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Q603393 Biologia
Pesquisadores da Universidade da Flórida estão realizando testes para introduzir nos Estados Unidos o inseto Calophya latiforceps (conhecido como gralha-da-folha-da-aroeira), nativo do Brasil, para combater a invasão de aroeira, que está diminuindo a biodiversidade de diversas regiões. Esse inseto alimenta-se de nutrientes da árvore, comprometendo seu crescimento. Esse processo é o controle biológico natural, que pode trazer risco para o ecossistema em que é implantado quando o organismo usado para fazer o controle: 
Alternativas
Q603392 Biologia
Uma pessoa vai ao mercado e compra pepino, cenoura, abóbora, tomate, uva, feijão, beterraba, couve e milho. Quantos desses produtos são frutos?
Alternativas
Q603391 Biologia
Em camundongos, o nanismo é causado por um alelo recessivo ligado ao cromossomo X e a pelagem rosa é determinada por um alelo autossômico dominante. Dois alelos recessivos para a pelagem proporcionam cor marrom para os camundongos, que é considerada selvagem (normal). Se uma fêmea anã com pelagem marrom é cruzada com um macho rosa normal de uma linhagem pura, quais serão as proporções fenotípicas, em F1 e F2, em cada sexo? 
Alternativas
Q603386 Química
Imagem associada para resolução da questão
Sobre as substâncias utilizadas em doping, apresentadas na questão anterior, considere as seguintes afirmativas: 

1. A metanfetamina possui uma amina secundária.
2. A testosterona é um composto aromático.
3. A testosterona possui função cetona.
4. A hidroclorotiazida é um sal.

Assinale a alternativa correta. 

Alternativas
Q603385 Química
As principais substâncias utilizadas no doping no esporte são classificadas como estimulantes, esteroides e diuréticos. São exemplos dessas classes, respectivamente, metanfetamina, testosterona e hidroclorotiazida, cujas estruturas são mostradas a seguir.

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A partir das estruturas das três substâncias, analise as afirmativas a seguir:
1. A testosterona possui seis carbonos quirais.
2. A metanfetamina possui dois isômeros ópticos.
3. A hidroclorotiazida possui isômeros geométricos.
4. As três substâncias utilizadas em doping apresentam algum tipo de isomeria.

Assinale a alternativa correta.

Alternativas
Q603383 Química
“Fórmula para fraudar leite no Sul era vendida a R$ 10 mil, diz Promotoria. Para cada 9 litros de leite, o fraudador misturava um litro de água e adicionava 10 gramas de ureia industrializada, que mascarava a dissolução. Essa substância continha formol, produto cancerígeno, que o MPE [Ministério Público Estadual] informou estimar ter contaminado 100 milhões de litros de leite em um ano."
(Notícia disponível em acesso em 08 ago. 2013.)
O texto extraído da notícia informa que o produto utilizado para fraudar o leite continha ureia e formol, compostos que possuem estruturas semelhantes, como mostrado ao lado.

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Com base nas estruturas, analise as seguintes afirmações: 
1. O número de oxidação do carbono na ureia é maior (mais positivo) que do carbono no formol. 

2. A carga formal do carbono da ureia é maior (mais positivo) que do carbono no formol.
3. Em ambos os casos a hibridização do carbono é sp2 .
4. Formol é um álcool.

Assinale a alternativa correta. 
Alternativas
Q603382 Química
As teorias atômicas vêm se desenvolvendo ao longo da história. Até o início do século XIX, não se tinha um modelo claro da constituição da matéria. De lá até a atualidade, a ideia de como a matéria é constituída sofreu diversas modificações, como se pode observar no modelo atômico de Bohr, que manteve paradigmas conceituais sobre a constituição da matéria, mas também inseriu novos conceitos surgidos no início do século XX.

No modelo atômico de Bohr:

1. O elétron circula em órbita com raio definido.
2. O elétron é descrito por uma função de onda.
3. Para descrever o elétron num orbital são necessários 4 números quânticos.
4. Toda a massa do átomo está concentrada no núcleo, que ocupa uma porção ínfima do espaço.

Entre as afirmativas acima, correspondem ao modelo atômico de Bohr:
Alternativas
Q602210 Inglês
                        Voices: The Pope's powerful message to Cubans 

                                 

Rick Jervis, September 24, 2015

SANTIAGO DE CUBA – I've always been fairly skeptical about how much power one man can exercise, even if that man commands the attention of 1.2 billion Roman Catholics.

      I understand that Pope John Paul II visited Poland in the 1970s and '80s and gave speeches so stirring that they helped launch the Solidarity opposition movement and lead to the collapse of communism in the country. And I know that popes throughout history have had influential moments.

      But, really, how much can one man and one microphone do? How literally do people take his message? These were the questions that kept my mind busy when I left for Cuba last week to cover Pope Francis' four-day trip. I was curious to see how much impact the words of this 78-year-old man can have on a population of 11 million.

      I'm becoming fairly familiar with Cuba. I've been to the island three times this year, five times overall, and grew up in southern Florida. My parents are Cubans who left the country in 1962. Cuba today continues to fascinate and dismay. It's a place of beauty and jolting contradictions. The re-establishment of relations between the U.S. and Cuban governments, begun last December, continue to stir excitement and hope in Cubans, and changes are trickling in.

      I followed Pope Francis from Havana to Santiago and heard him talk of reconciliation, love for mankind and the importance of family. I interviewed Cubans who glowed with the fervor of the faithful as they pledged their love for the Pope and promised to follow his message. But my question remained: What does all of this mean? How does it translate to actual change on the island?

      To help me sort through this, I visited Father Jorge Catasus, a popular parish priest here who helped welcome the Pope to the city. We sat in the cool, cavernous back room of his 18th-century church, safe from the 37-degree heat outside. Catasus said “don't focus on any grand political or social changes stemming from the papal visit". The most important changes, he said, come from within. That's what Pope Francis offered as a first step, and that's what Cubans across the island, in chants, cheers and tearful acceptance, agreed to abide by.

      “The lives of men are decided in their hearts", Catasus told me. “That's where we'll see the change". This may not be 1980s Poland, and Solidarity may still not be anywhere in sight. But first things first. A change of heart can often lead to a world of good.


                                                                         Adapted from <http://www.usatoday.com/> . 
According to the text, in the beginning the writer was skeptical about the results of the Pope's visit to Cuba because: 
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Q602209 Inglês
                        Voices: The Pope's powerful message to Cubans 

                                 

Rick Jervis, September 24, 2015

SANTIAGO DE CUBA – I've always been fairly skeptical about how much power one man can exercise, even if that man commands the attention of 1.2 billion Roman Catholics.

      I understand that Pope John Paul II visited Poland in the 1970s and '80s and gave speeches so stirring that they helped launch the Solidarity opposition movement and lead to the collapse of communism in the country. And I know that popes throughout history have had influential moments.

      But, really, how much can one man and one microphone do? How literally do people take his message? These were the questions that kept my mind busy when I left for Cuba last week to cover Pope Francis' four-day trip. I was curious to see how much impact the words of this 78-year-old man can have on a population of 11 million.

      I'm becoming fairly familiar with Cuba. I've been to the island three times this year, five times overall, and grew up in southern Florida. My parents are Cubans who left the country in 1962. Cuba today continues to fascinate and dismay. It's a place of beauty and jolting contradictions. The re-establishment of relations between the U.S. and Cuban governments, begun last December, continue to stir excitement and hope in Cubans, and changes are trickling in.

      I followed Pope Francis from Havana to Santiago and heard him talk of reconciliation, love for mankind and the importance of family. I interviewed Cubans who glowed with the fervor of the faithful as they pledged their love for the Pope and promised to follow his message. But my question remained: What does all of this mean? How does it translate to actual change on the island?

      To help me sort through this, I visited Father Jorge Catasus, a popular parish priest here who helped welcome the Pope to the city. We sat in the cool, cavernous back room of his 18th-century church, safe from the 37-degree heat outside. Catasus said “don't focus on any grand political or social changes stemming from the papal visit". The most important changes, he said, come from within. That's what Pope Francis offered as a first step, and that's what Cubans across the island, in chants, cheers and tearful acceptance, agreed to abide by.

      “The lives of men are decided in their hearts", Catasus told me. “That's where we'll see the change". This may not be 1980s Poland, and Solidarity may still not be anywhere in sight. But first things first. A change of heart can often lead to a world of good.


                                                                         Adapted from <http://www.usatoday.com/> . 
According to the text, Jorge Catasus is:
Alternativas
Q602208 Inglês
                        Voices: The Pope's powerful message to Cubans 

                                 

Rick Jervis, September 24, 2015

SANTIAGO DE CUBA – I've always been fairly skeptical about how much power one man can exercise, even if that man commands the attention of 1.2 billion Roman Catholics.

      I understand that Pope John Paul II visited Poland in the 1970s and '80s and gave speeches so stirring that they helped launch the Solidarity opposition movement and lead to the collapse of communism in the country. And I know that popes throughout history have had influential moments.

      But, really, how much can one man and one microphone do? How literally do people take his message? These were the questions that kept my mind busy when I left for Cuba last week to cover Pope Francis' four-day trip. I was curious to see how much impact the words of this 78-year-old man can have on a population of 11 million.

      I'm becoming fairly familiar with Cuba. I've been to the island three times this year, five times overall, and grew up in southern Florida. My parents are Cubans who left the country in 1962. Cuba today continues to fascinate and dismay. It's a place of beauty and jolting contradictions. The re-establishment of relations between the U.S. and Cuban governments, begun last December, continue to stir excitement and hope in Cubans, and changes are trickling in.

      I followed Pope Francis from Havana to Santiago and heard him talk of reconciliation, love for mankind and the importance of family. I interviewed Cubans who glowed with the fervor of the faithful as they pledged their love for the Pope and promised to follow his message. But my question remained: What does all of this mean? How does it translate to actual change on the island?

      To help me sort through this, I visited Father Jorge Catasus, a popular parish priest here who helped welcome the Pope to the city. We sat in the cool, cavernous back room of his 18th-century church, safe from the 37-degree heat outside. Catasus said “don't focus on any grand political or social changes stemming from the papal visit". The most important changes, he said, come from within. That's what Pope Francis offered as a first step, and that's what Cubans across the island, in chants, cheers and tearful acceptance, agreed to abide by.

      “The lives of men are decided in their hearts", Catasus told me. “That's where we'll see the change". This may not be 1980s Poland, and Solidarity may still not be anywhere in sight. But first things first. A change of heart can often lead to a world of good.


                                                                         Adapted from <http://www.usatoday.com/> . 
Consider the following statements about what the author of the text did in the island during the Pope's visit:

1. He visited a priest who also gave speeches during the Pope's stay in Cuba.

2. He talked to the Cuban people and observed their faith.

3. In order to escape from the warm weather, he decided to go to an old church.

4. He followed Pope Francis and heard his speeches.

Which of the statements above are TRUE, according to the text? 
Alternativas
Q602207 Inglês
                        Voices: The Pope's powerful message to Cubans 

                                 

Rick Jervis, September 24, 2015

SANTIAGO DE CUBA – I've always been fairly skeptical about how much power one man can exercise, even if that man commands the attention of 1.2 billion Roman Catholics.

      I understand that Pope John Paul II visited Poland in the 1970s and '80s and gave speeches so stirring that they helped launch the Solidarity opposition movement and lead to the collapse of communism in the country. And I know that popes throughout history have had influential moments.

      But, really, how much can one man and one microphone do? How literally do people take his message? These were the questions that kept my mind busy when I left for Cuba last week to cover Pope Francis' four-day trip. I was curious to see how much impact the words of this 78-year-old man can have on a population of 11 million.

      I'm becoming fairly familiar with Cuba. I've been to the island three times this year, five times overall, and grew up in southern Florida. My parents are Cubans who left the country in 1962. Cuba today continues to fascinate and dismay. It's a place of beauty and jolting contradictions. The re-establishment of relations between the U.S. and Cuban governments, begun last December, continue to stir excitement and hope in Cubans, and changes are trickling in.

      I followed Pope Francis from Havana to Santiago and heard him talk of reconciliation, love for mankind and the importance of family. I interviewed Cubans who glowed with the fervor of the faithful as they pledged their love for the Pope and promised to follow his message. But my question remained: What does all of this mean? How does it translate to actual change on the island?

      To help me sort through this, I visited Father Jorge Catasus, a popular parish priest here who helped welcome the Pope to the city. We sat in the cool, cavernous back room of his 18th-century church, safe from the 37-degree heat outside. Catasus said “don't focus on any grand political or social changes stemming from the papal visit". The most important changes, he said, come from within. That's what Pope Francis offered as a first step, and that's what Cubans across the island, in chants, cheers and tearful acceptance, agreed to abide by.

      “The lives of men are decided in their hearts", Catasus told me. “That's where we'll see the change". This may not be 1980s Poland, and Solidarity may still not be anywhere in sight. But first things first. A change of heart can often lead to a world of good.


                                                                         Adapted from <http://www.usatoday.com/> . 
Concerning the author of the text, identify the statements below as true (T) or false (F):

( ) He was raised in the south of Florida, USA.

( ) His parents are Cubans who left the country and moved to the USA.

( ) He feels fascinated by the beauty and contradictions of Cuba.

( ) He considers that Cubans are not interested about the re-establishment of relations with the USA.

( ) He was born in 1962 when his parents left Cuba.

Mark the alternative which presents the correct sequence, from top to bottom. 
Alternativas
Q602206 Inglês
Forget Texting While Driving: AT&T Survey reveals drivers do a lot more with their smartphones

By Menchie Mendoza, Tech Times | May 20, 10:10 AM 

                                   

      Drivers who continue to use their smartphones while driving are not only distracted when they call and text. Apart from calling and texting, drivers are also browsing the Internet, tweeting, video chatting, taking selfies and sending email with their devices, according to a study by AT&T.

      The research was conducted as part of the carrier's "It Can Wait" campaign launched in 2010. It hopes to increase awareness of the dangers posed by using smartphones while one is behind the wheel. The study polled 2,067 U.S. residents ages 16-65 who use their smartphone and drive once or more per day.

      Seventy percent of those surveyed admit they use their smartphones for a number of activities while they are driving: 61 percent say they text and 33 percent send email while they are behind the wheel. Posting or interacting on social media is also one of the most common activities that drivers engage in. Using Facebook ranks first on the list, with 27 percent of drivers logging in while driving. Other social media channels that keep drivers "multitasking" include Instagram and Twitter (14 percent) and Snapchat (11 percent).

      The results also show that there is a deeper problem involved when people use social media while driving. Among those surveyed, 22 percent blame their addiction to social media.

      Other revelations show 62 percent keep their smartphones within easy reach, and that 30 percent of those who post to Twitter while driving do it "all the time". Drivers also don't seem to run out of other activities using their smartphones since most apps are now easily accessed with just a simple tap. Because of this, 28 percent of drivers browse the web; 17 percent take selfies (or groupies); and 10 percent video chat. 

      "One in 10 say they do video chat while driving", said Lori Lee, AT&T's senior VP for global marketing. "I don't even have words for that". AT&T plans to expand the "It Can Wait" campaign in order to add more focus on the topic of texting while driving by including other driving distractions that result from using the smartphones. "When we launched 'It Can Wait' five years ago, we pleaded with people to realize that no text is worth a life", said Lee. "The same applies to other smartphone activities that people are doing while driving. For the sake of you and those around you, please keep your eyes on the road, not on your phone". AT&T will also launch a nationwide virtual reality tour in summer in order to spread the word that driving and using a smartphone don't and will never mix.

                                                                          Adapted from <http://www.techtimes.com/>. 
Because of the results of its survey, AT&T is planning:

1. to expand its campaign and include other smartphone distractions.

2. to expand its campaign to other parts of the world.

3. to improve smartphone use with new apps.

4. to invest in a virtual reality tour as part of their awareness efforts.

According to the text, the correct items are: 
Alternativas
Q602205 Inglês
Forget Texting While Driving: AT&T Survey reveals drivers do a lot more with their smartphones

By Menchie Mendoza, Tech Times | May 20, 10:10 AM 

                                   

      Drivers who continue to use their smartphones while driving are not only distracted when they call and text. Apart from calling and texting, drivers are also browsing the Internet, tweeting, video chatting, taking selfies and sending email with their devices, according to a study by AT&T.

      The research was conducted as part of the carrier's "It Can Wait" campaign launched in 2010. It hopes to increase awareness of the dangers posed by using smartphones while one is behind the wheel. The study polled 2,067 U.S. residents ages 16-65 who use their smartphone and drive once or more per day.

      Seventy percent of those surveyed admit they use their smartphones for a number of activities while they are driving: 61 percent say they text and 33 percent send email while they are behind the wheel. Posting or interacting on social media is also one of the most common activities that drivers engage in. Using Facebook ranks first on the list, with 27 percent of drivers logging in while driving. Other social media channels that keep drivers "multitasking" include Instagram and Twitter (14 percent) and Snapchat (11 percent).

      The results also show that there is a deeper problem involved when people use social media while driving. Among those surveyed, 22 percent blame their addiction to social media.

      Other revelations show 62 percent keep their smartphones within easy reach, and that 30 percent of those who post to Twitter while driving do it "all the time". Drivers also don't seem to run out of other activities using their smartphones since most apps are now easily accessed with just a simple tap. Because of this, 28 percent of drivers browse the web; 17 percent take selfies (or groupies); and 10 percent video chat. 

      "One in 10 say they do video chat while driving", said Lori Lee, AT&T's senior VP for global marketing. "I don't even have words for that". AT&T plans to expand the "It Can Wait" campaign in order to add more focus on the topic of texting while driving by including other driving distractions that result from using the smartphones. "When we launched 'It Can Wait' five years ago, we pleaded with people to realize that no text is worth a life", said Lee. "The same applies to other smartphone activities that people are doing while driving. For the sake of you and those around you, please keep your eyes on the road, not on your phone". AT&T will also launch a nationwide virtual reality tour in summer in order to spread the word that driving and using a smartphone don't and will never mix.

                                                                          Adapted from <http://www.techtimes.com/>. 
The word “they", in boldface and italics, last paragraph, refers to: 
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Q602204 Inglês
Forget Texting While Driving: AT&T Survey reveals drivers do a lot more with their smartphones

By Menchie Mendoza, Tech Times | May 20, 10:10 AM 

                                   

      Drivers who continue to use their smartphones while driving are not only distracted when they call and text. Apart from calling and texting, drivers are also browsing the Internet, tweeting, video chatting, taking selfies and sending email with their devices, according to a study by AT&T.

      The research was conducted as part of the carrier's "It Can Wait" campaign launched in 2010. It hopes to increase awareness of the dangers posed by using smartphones while one is behind the wheel. The study polled 2,067 U.S. residents ages 16-65 who use their smartphone and drive once or more per day.

      Seventy percent of those surveyed admit they use their smartphones for a number of activities while they are driving: 61 percent say they text and 33 percent send email while they are behind the wheel. Posting or interacting on social media is also one of the most common activities that drivers engage in. Using Facebook ranks first on the list, with 27 percent of drivers logging in while driving. Other social media channels that keep drivers "multitasking" include Instagram and Twitter (14 percent) and Snapchat (11 percent).

      The results also show that there is a deeper problem involved when people use social media while driving. Among those surveyed, 22 percent blame their addiction to social media.

      Other revelations show 62 percent keep their smartphones within easy reach, and that 30 percent of those who post to Twitter while driving do it "all the time". Drivers also don't seem to run out of other activities using their smartphones since most apps are now easily accessed with just a simple tap. Because of this, 28 percent of drivers browse the web; 17 percent take selfies (or groupies); and 10 percent video chat. 

      "One in 10 say they do video chat while driving", said Lori Lee, AT&T's senior VP for global marketing. "I don't even have words for that". AT&T plans to expand the "It Can Wait" campaign in order to add more focus on the topic of texting while driving by including other driving distractions that result from using the smartphones. "When we launched 'It Can Wait' five years ago, we pleaded with people to realize that no text is worth a life", said Lee. "The same applies to other smartphone activities that people are doing while driving. For the sake of you and those around you, please keep your eyes on the road, not on your phone". AT&T will also launch a nationwide virtual reality tour in summer in order to spread the word that driving and using a smartphone don't and will never mix.

                                                                          Adapted from <http://www.techtimes.com/>. 
Consider the following statements about the AT&T study about the use of smartphones while driving:

1. More than two thousand residents in the United States were interviewed.

2. 70% of the people surveyed said they use smartphones to perform several activities.

3. Less than one tenth of the polled people said they use Snapchat.

4. About one third of the polled people said they send e-mails.

5. People said it is all right to use smartphones provided that they are able to multitask.

Which of the statements above are TRUE, according to the text? 
Alternativas
Q602203 Inglês
Forget Texting While Driving: AT&T Survey reveals drivers do a lot more with their smartphones

By Menchie Mendoza, Tech Times | May 20, 10:10 AM 

                                   

      Drivers who continue to use their smartphones while driving are not only distracted when they call and text. Apart from calling and texting, drivers are also browsing the Internet, tweeting, video chatting, taking selfies and sending email with their devices, according to a study by AT&T.

      The research was conducted as part of the carrier's "It Can Wait" campaign launched in 2010. It hopes to increase awareness of the dangers posed by using smartphones while one is behind the wheel. The study polled 2,067 U.S. residents ages 16-65 who use their smartphone and drive once or more per day.

      Seventy percent of those surveyed admit they use their smartphones for a number of activities while they are driving: 61 percent say they text and 33 percent send email while they are behind the wheel. Posting or interacting on social media is also one of the most common activities that drivers engage in. Using Facebook ranks first on the list, with 27 percent of drivers logging in while driving. Other social media channels that keep drivers "multitasking" include Instagram and Twitter (14 percent) and Snapchat (11 percent).

      The results also show that there is a deeper problem involved when people use social media while driving. Among those surveyed, 22 percent blame their addiction to social media.

      Other revelations show 62 percent keep their smartphones within easy reach, and that 30 percent of those who post to Twitter while driving do it "all the time". Drivers also don't seem to run out of other activities using their smartphones since most apps are now easily accessed with just a simple tap. Because of this, 28 percent of drivers browse the web; 17 percent take selfies (or groupies); and 10 percent video chat. 

      "One in 10 say they do video chat while driving", said Lori Lee, AT&T's senior VP for global marketing. "I don't even have words for that". AT&T plans to expand the "It Can Wait" campaign in order to add more focus on the topic of texting while driving by including other driving distractions that result from using the smartphones. "When we launched 'It Can Wait' five years ago, we pleaded with people to realize that no text is worth a life", said Lee. "The same applies to other smartphone activities that people are doing while driving. For the sake of you and those around you, please keep your eyes on the road, not on your phone". AT&T will also launch a nationwide virtual reality tour in summer in order to spread the word that driving and using a smartphone don't and will never mix.

                                                                          Adapted from <http://www.techtimes.com/>. 
Identify the statements below as true (T) or false (F). According to the text, the results of the AT&T survey show that while driving, people use their smartphones to: 

( ) take pictures.

( ) chat by using video.

( ) interact in social media.

( ) send text messages.

( ) watch video clips.

Mark the alternative which presents the correct sequence, from top to bottom. 
Alternativas
Q602202 Biologia
Um estudo da Universidade Federal de Minas Gerais mostra que é possível reduzir muito os arrotos das 211 milhões de cabeças do rebanho brasileiro. Com melhor pasto e suplementação alimentar, o gado engordaria mais e mais rápido e passaria menos tempo arrotando.

                                                              Fonte: Folha de S. Paulo, 29 de agosto de 2015.

A redução da quantidade de arrotos pode ajudar a controlar o aquecimento do planeta porque diminui a emissão de: 
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Q602200 Biologia
A figura ao lado apresenta uma classificação dos seres vivos baseada em sua fonte primária de energia.

Bactérias são encontradas nos grupos: 

                                Imagem associada para resolução da questão
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Q602195 Biologia
Existem diferentes modos de transmissão das doenças infecciosas humanas. A figura ao lado apresenta três deles.

Dengue e tuberculose têm seus principais modos de transmissão representados, respectivamente, em: 

                           Imagem associada para resolução da questão
Alternativas
Q602184 Química
O Nobel da Paz de 2013 foi entregue à Organização para a Proibição das Armas Químicas, o que reforçou a preocupação mundial quanto à erradicação desse tipo de armamento. O VX é um agente químico altamente tóxico, classificado como arma de destruição em massa. A eliminação desse agente é realizada via degradação, que pode ocorrer por três caminhos, tal como ilustrado ao lado. No entanto, o composto “5" também pode atuar como arma química, por ser muito mais tóxico que os outros produtos da degradação.

                   Imagem associada para resolução da questão

O quadro abaixo mostra as condições para detoxificação do agente VX e respectivos resultados pelos diferentes métodos.

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Com base nas informações fornecidas, qual método de detoxificação é mais eficiente?
Alternativas
Q602183 Química
Um dos parâmetros que caracteriza a qualidade de manteigas industriais é o teor de ácidos carboxílicos presentes, o qual pode ser determinado de maneira indireta, a partir da reação desses ácidos com etanol, levando aos ésteres correspondentes. Uma amostra de manteiga foi submetida a essa análise e a porcentagem dos ésteres produzidos foi quantificada, estando o resultado ilustrado no diagrama ao lado.

O ácido carboxílico presente em maior quantidade na amostra analisada é o: 

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Alternativas
Respostas
441: C
442: E
443: A
444: C
445: C
446: C
447: D
448: A
449: E
450: B
451: B
452: B
453: B
454: C
455: D
456: B
457: E
458: C
459: C
460: E