Questões de Vestibular CEDERJ 2021 para Vestibular - Língua Inglesa, 2022.1

Na titulação de 50.00 mL de HAc 0.10 M (Ka = 1.8 x 10^-5 ) com padrão de NaOH 0.10 M, após a adição dos seguintes volumes do titulante: 49.95 mL e 75.00 mL, os valores do pH, serão, aproximadamente:

Sobre o composto orgânico de fórmula estrutural

H₂C = C(C₃H₇)CH(CH₃)CH(CH₃)CH₂CH₃

fazem-se as seguintes afirmações:

I É um alceno.

II Possui três ramificações diferentes entre si, ligadas à cadeia principal.

III Apesar de ter fórmula molecular C₁₁H₂₂, não é um hidrocarboneto.

IV Possui no total quatro carbonos terciários.

A opção que contém as afirmações corretas é:

TEXT 1

Avaiable from:<https://twitter.com/dalupton/status/1291675856926998530>   Access: 10 Oct. 2021.

In the comic strip, all the characters are answering a question. It may be inferred, from their answers, that this question is:

TEXT 2

Available from: www.nature.com/naturemedicine. Access: 10 Oct. 2021. Adapted.

The linking word “although” (underlined in two sentences of the text) establishes a contrast between ideas, and it may be replaced by “but”. The alternative which correctly expresses the ideas which are contrasted in the two sentences is: 

TEXT 3

A pandemic of change?

Many researchers and wildlife organizations are urging scientists to use this unprecedented time for a close examination of the impact of human activity on the natural world. They argue that the information that researchers gather during this time could help improve conservation and biodiversity efforts.

It may also improve their ability to predict global environmental changes and potential cases of zoonoses, the transmission of disease from animals to humans. This could save millions of human lives, and economic losses, going forward.

Realistically, it will take years to assess exactly how the COVID-19 pandemic has affected wildlife, the environment, and the climate. Moreover, the impact of the pandemic on the natural world is unlikely to be linear. Research suggests that a reduction in some pollutants, including nitrogen oxides, may result in the rise of others, such as ozone.

Understanding how this pandemic has changed humans’ relationship with nature may be just as complex. But for now, these positive changes may be enough to give some people, and Mother Nature, the hope of a better future.

Avaiable from: <https://www.medicalnewstoday.com/articles/how-covid-19-has-changed-the-face-of-the-natural-world#A-pandemic-of-change?> Access: 10 Oct. 2021. Adapted.

According to the article, up to the moment, the consequences of COVID-19 on the environment: