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Resultados: 58.062 questões

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  • Linguagens

    Inglês

    Read the following passage and choose the option which best completes each question, according to the text:  

    Footfalls

        London is a city made for walking. Unlike, for example, Los Angeles its centre is easily accessible on foot. Between 2001 and 2011 the number of trips made daily on foot in London increased by 12%. Each day 6.2m walks are made across the city.
       Several reasons account for the walking boom. The number of Londoners increased by 12% from 7.3m in 2001 to 8.2m in 2011, and Underground trains are hot and overcrowded. But other factors also encourage pedestrians. In 2004 Ken Livingstone, then mayor of London, promised to make London a “walkable city”. Some of his plans were carried on by Boris Johnson, the current mayor. These include a scheme to create clearly-marked maps for use across the city and make streets more pedestrian-friendly. Londoners may also be more aware of the advantages of walking. Health campaigns like the National Health Service’s “Live Well” emphasize that walking is the easiest form of exercise.
       High streets and town centres need to win back walkers. Learning from London’s incentives could be a start. 

    (Adapted from: http://www.economist.com/news/britain/21582576-urban-pedestrians-buck-national-trend-footfalls.) 

    The National Health Service’s campaign “Live Well” call attention to the fact that

    Escolha uma alternativa para a questão 9bd6ac63-b0
  • Linguagens

    Português

    Leia abaixo trecho retirado do romance Abdias, de Cyro dos Anjos:

    “Esperem. Não devo escrever tudo o que me vem à cabeça. Às vezes representamos como atores, perante nós próprios, e mesmo aquilo que brota espontaneamente do coração costuma não ser sincero. Os sentimentos usam máscaras até em sua câmara íntima. Para encontrar a verdade, temos de despi-los, nos redutos mais secretos. Bem sei que não sou um monstro. Talvez tenha querido passar como tal, apenas para excitar a piedade de alguém em cujas mãos possam estas páginas cair algum dia. É muito conhecido este processo de captarmos a benevolência alheia com a confissão nua de nossas misérias.” (ANJOS, 1963, p. 102)

    Com base no trecho acima bem como na leitura do romance, pode-se afirmar que todas as afirmativas estão corretas, EXCETO
    Escolha uma alternativa para a questão 9bd74b2d-04
  • Ciências da Natureza

    Biologia

          Paleontólogos encontraram o fóssil de um anfíbio que viveu há cerca de 250 milhões de anos. Batizado de Kwatisuchus rosai, o animal era aparentado a espécies já descritas na Rússia. O achado confirma a suspeita de que os animais da época circulavam pela Pangeia. As falhas do registro fóssil tornam difícil dizer qual caminho os anfíbios percorreram entre os territórios dos atuais Brasil e Rússia. O K. rosai fazia parte de um grupo de anfíbios chamados temnospôndilos, predadores de peixes, caçava em terra e contou com a vantagem de uma dieta variada e com a provável capacidade de construir buracos revestidos de muco, onde se protegeria da seca.

    (https://revistapesquisa.fapesp.br. Adaptado.)


    As forças que configuraram a atual posição dos continentes e a importância fisiológica do muco nos buracos construídos pelo K. rosai são, respectivamente,
    Escolha uma alternativa para a questão 9bd8da55-31
  • Linguagens

    Inglês

    Mobile milestones: how your phone
    became an essential part of your life


    Imagem da questão de Inglês, UNIFESP 2017, Interpretação de texto | Reading comprehension



        Has any device changed our lives as much, and as quickly, as the mobile phone? There are people today for whom the world of address books, street atlases and phone boxes seems very far away, lost in the mists of time. Following, there are just some of the big milestones from the past 30 years that have made almost everything we do easier, more public and very, very fast.
    • The first phones arrive – and become status symbols Few people got the chance to use the very early mobile phones. The first call was made in New York in 1973, but handsets with a network to use were not available until 1983 in the US, and 1985 in the UK. That first British mobile phone was essentially a heavy briefcase with a receiver attached by a wire. It cost £2,000 (£5,000 in today’s prices), and gave you half an hour’s chat on an overnight charge. Making a call was not something you could do subtly, but that wasn’t the point; the first handsets were there to be seen. They sent a message that you were bold and confident with new technology, that you were busy and important enough to need a mobile phone, and were rich enough to buy one.
    • Text messages spawn a whole new language
        The first mobiles worked with analogue signals and could only make phone calls, but the digital ones that followed in the early 1990s could send SMS messages as well. After the first message was sent on 3 December 1992, texting took off like a rocket, even though it was still a pretty cumbersome procedure. Handsets with predictive text would make things easier, but in the 1990s you could save a lot of time by removing all excess letters from a message, often the vowels, and so txtspk ws brn. Today the average mobile phone sends more than 100 texts per month.
    • Phones turn us all into photographers...
        There seemed to be no good reason for the first camera phones, which began to appear in 2002, with resolutions of about 0.3 megapixels. They took grainy, blurry pictures on postage stamp-sized screens, and even these filled the phone’s memory in no time. Gradually, though, as the quality improved, the uses followed. As well as the usual photos of friends and family, they were handy for “saving” pieces of paper, and in pubs you could take a picture of the specials board and take it back to your table. Modern camera phones have changed beyond recognition in the past 20 years. The new mobile phones boast the highest resolution dual camera on a smartphone: a 16-megapixel camera and a 20-megapixel camera side-by-side. The dual camera allows users to focus on their subjects, while blurring out the background, producing professional-looking portraits.
    • …and we turn ourselves into celebrities
        Twenty years ago people would have thought you a little strange if you took flattering photos of yourself and your lifestyle and then distributed them to your friends – let alone to members of the public. If you used printed photographs rather than a smartphone app, they would still think so today. Yet sharing our lives on social media is now the norm, not the exception – and it was the camera phone that made it all possible. Now, some phones come with an enormous 64GB of memory, so you can capture, share and store an almost countless number of videos and pictures – well, certainly enough to keep up with the Kardashians.

    (www.theguardian.com, 07.07.2017. Adaptado.)
    De acordo com o texto, um dos aspectos positivos dos telefones celulares é que eles
    Escolha uma alternativa para a questão 9bd9bf2d-dd
  • Linguagens

    Inglês

    Read the following passage and choose the option which best completes each question, according to the text:  

    Footfalls

        London is a city made for walking. Unlike, for example, Los Angeles its centre is easily accessible on foot. Between 2001 and 2011 the number of trips made daily on foot in London increased by 12%. Each day 6.2m walks are made across the city.
       Several reasons account for the walking boom. The number of Londoners increased by 12% from 7.3m in 2001 to 8.2m in 2011, and Underground trains are hot and overcrowded. But other factors also encourage pedestrians. In 2004 Ken Livingstone, then mayor of London, promised to make London a “walkable city”. Some of his plans were carried on by Boris Johnson, the current mayor. These include a scheme to create clearly-marked maps for use across the city and make streets more pedestrian-friendly. Londoners may also be more aware of the advantages of walking. Health campaigns like the National Health Service’s “Live Well” emphasize that walking is the easiest form of exercise.
       High streets and town centres need to win back walkers. Learning from London’s incentives could be a start. 

    (Adapted from: http://www.economist.com/news/britain/21582576-urban-pedestrians-buck-national-trend-footfalls.) 

    The word could in “Learning from London’s incentives could be a start.” (paragraph 03) indicates
    Escolha uma alternativa para a questão 9bdb5adf-b0
  • Ciências da Natureza

    Química

    As ligas de solda mais comuns são misturas de estanho e chumbo. Duas dessas ligas são as representadas pelas siglas 63-37 e 60-40. Nessas siglas, o primeiro número representa a porcentagem de estanho presente em cada mistura, e o segundo número, a porcentagem de chumbo.

    Os gráficos representam as curvas de aquecimento dessas duas ligas.


    Imagem da questão de Química, UNESP 2024, Substâncias e suas propriedades


    A análise dos gráficos revela que 
    Escolha uma alternativa para a questão 9bdb77a4-31
  • Linguagens

    Inglês

    Mobile milestones: how your phone
    became an essential part of your life


    Imagem da questão de Inglês, UNIFESP 2017, Interpretação de texto | Reading comprehension



        Has any device changed our lives as much, and as quickly, as the mobile phone? There are people today for whom the world of address books, street atlases and phone boxes seems very far away, lost in the mists of time. Following, there are just some of the big milestones from the past 30 years that have made almost everything we do easier, more public and very, very fast.
    • The first phones arrive – and become status symbols Few people got the chance to use the very early mobile phones. The first call was made in New York in 1973, but handsets with a network to use were not available until 1983 in the US, and 1985 in the UK. That first British mobile phone was essentially a heavy briefcase with a receiver attached by a wire. It cost £2,000 (£5,000 in today’s prices), and gave you half an hour’s chat on an overnight charge. Making a call was not something you could do subtly, but that wasn’t the point; the first handsets were there to be seen. They sent a message that you were bold and confident with new technology, that you were busy and important enough to need a mobile phone, and were rich enough to buy one.
    • Text messages spawn a whole new language
        The first mobiles worked with analogue signals and could only make phone calls, but the digital ones that followed in the early 1990s could send SMS messages as well. After the first message was sent on 3 December 1992, texting took off like a rocket, even though it was still a pretty cumbersome procedure. Handsets with predictive text would make things easier, but in the 1990s you could save a lot of time by removing all excess letters from a message, often the vowels, and so txtspk ws brn. Today the average mobile phone sends more than 100 texts per month.
    • Phones turn us all into photographers...
        There seemed to be no good reason for the first camera phones, which began to appear in 2002, with resolutions of about 0.3 megapixels. They took grainy, blurry pictures on postage stamp-sized screens, and even these filled the phone’s memory in no time. Gradually, though, as the quality improved, the uses followed. As well as the usual photos of friends and family, they were handy for “saving” pieces of paper, and in pubs you could take a picture of the specials board and take it back to your table. Modern camera phones have changed beyond recognition in the past 20 years. The new mobile phones boast the highest resolution dual camera on a smartphone: a 16-megapixel camera and a 20-megapixel camera side-by-side. The dual camera allows users to focus on their subjects, while blurring out the background, producing professional-looking portraits.
    • …and we turn ourselves into celebrities
        Twenty years ago people would have thought you a little strange if you took flattering photos of yourself and your lifestyle and then distributed them to your friends – let alone to members of the public. If you used printed photographs rather than a smartphone app, they would still think so today. Yet sharing our lives on social media is now the norm, not the exception – and it was the camera phone that made it all possible. Now, some phones come with an enormous 64GB of memory, so you can capture, share and store an almost countless number of videos and pictures – well, certainly enough to keep up with the Kardashians.

    (www.theguardian.com, 07.07.2017. Adaptado.)
    No texto, um dos exemplos da expressão “big milestones” (1o parágrafo) é
    Escolha uma alternativa para a questão 9bdd3cf8-dd
  • Ciências da Natureza

    Física

    A imagem mostra cilindros de gelo-seco, CO2 (s), substância muito empregada no transporte e conservação de alimentos sob refrigeração.


    Imagem da questão de Física, UNESP 2024, Física Térmica - Termologia

    (www.gbgeloseco.com.br)


    O gelo-seco tem esse nome porque sofre sublimação, ou seja, passa diretamente do estado sólido para o estado gasoso, sem passar pelo estado líquido. Sabendo que o volume molar de um gás medido nas CATP (Condições Ambiente de Temperatura e Pressão) é igual a 25 L/mol, o volume, medido nas CATP, ocupado pelo gás resultante da sublimação de 1,1 kg de gelo-seco é próximo de
    Escolha uma alternativa para a questão 9bde1f26-31
  • Linguagens

    Português

    Leia a canção “Caminhos de Minas”, de Elcio Lucas, para responder à questão subsequente:

    Pelos caminhos de Minas
    onde a esperança é maior
    onde domina a coragem
    onde se planta a verdade
    de um amor.

    Pelos caminhos de Minas
    onde o encontro é fatal
    com a vida sofrida
    lágrimas corridas
    que molham o chão.

    As grossas raízes
    ingênuas e firmes
    sustentam toda canção
    e seivam todo coração
    que tem fé na terra
    que tem luz nas trevas
    que ama o chão.

    Sobre esse texto, pode-se afirmar:
    Escolha uma alternativa para a questão 9be0565e-04
  • Linguagens

    Inglês

    Mobile milestones: how your phone
    became an essential part of your life


    Imagem da questão de Inglês, UNIFESP 2017, Interpretação de texto | Reading comprehension



        Has any device changed our lives as much, and as quickly, as the mobile phone? There are people today for whom the world of address books, street atlases and phone boxes seems very far away, lost in the mists of time. Following, there are just some of the big milestones from the past 30 years that have made almost everything we do easier, more public and very, very fast.
    • The first phones arrive – and become status symbols Few people got the chance to use the very early mobile phones. The first call was made in New York in 1973, but handsets with a network to use were not available until 1983 in the US, and 1985 in the UK. That first British mobile phone was essentially a heavy briefcase with a receiver attached by a wire. It cost £2,000 (£5,000 in today’s prices), and gave you half an hour’s chat on an overnight charge. Making a call was not something you could do subtly, but that wasn’t the point; the first handsets were there to be seen. They sent a message that you were bold and confident with new technology, that you were busy and important enough to need a mobile phone, and were rich enough to buy one.
    • Text messages spawn a whole new language
        The first mobiles worked with analogue signals and could only make phone calls, but the digital ones that followed in the early 1990s could send SMS messages as well. After the first message was sent on 3 December 1992, texting took off like a rocket, even though it was still a pretty cumbersome procedure. Handsets with predictive text would make things easier, but in the 1990s you could save a lot of time by removing all excess letters from a message, often the vowels, and so txtspk ws brn. Today the average mobile phone sends more than 100 texts per month.
    • Phones turn us all into photographers...
        There seemed to be no good reason for the first camera phones, which began to appear in 2002, with resolutions of about 0.3 megapixels. They took grainy, blurry pictures on postage stamp-sized screens, and even these filled the phone’s memory in no time. Gradually, though, as the quality improved, the uses followed. As well as the usual photos of friends and family, they were handy for “saving” pieces of paper, and in pubs you could take a picture of the specials board and take it back to your table. Modern camera phones have changed beyond recognition in the past 20 years. The new mobile phones boast the highest resolution dual camera on a smartphone: a 16-megapixel camera and a 20-megapixel camera side-by-side. The dual camera allows users to focus on their subjects, while blurring out the background, producing professional-looking portraits.
    • …and we turn ourselves into celebrities
        Twenty years ago people would have thought you a little strange if you took flattering photos of yourself and your lifestyle and then distributed them to your friends – let alone to members of the public. If you used printed photographs rather than a smartphone app, they would still think so today. Yet sharing our lives on social media is now the norm, not the exception – and it was the camera phone that made it all possible. Now, some phones come with an enormous 64GB of memory, so you can capture, share and store an almost countless number of videos and pictures – well, certainly enough to keep up with the Kardashians.

    (www.theguardian.com, 07.07.2017. Adaptado.)
    The mobile phones connected to a network were first accessible
    Escolha uma alternativa para a questão 9be0d6f7-dd
  • Ciências da Natureza

    Química

    Uma solução aquosa do sal sulfato de cobre pentahidratado, CuSO4 .5H2 O, massa molar = 250 g/mol, foi preparada pela diluição de 10 mL de uma solução estoque do sal que contém 10 g do sal /100 mL de solução, até o volume final de 1 L.

    A concentração da solução diluída do sal, expressa em g/L e em mol/L, é, respectivamente,
    Escolha uma alternativa para a questão 9be0e803-31
  • Ciências da Natureza

    Física

    Imagem da questão de Física, ENEM 2009, Magnetismo Dentre os fenômenos decorrentes da interação entre a radiação e os átomos do indivíduo que permitem a obtenção desta imagem inclui-se a

    Escolha uma alternativa para a questão 9be22e6f-bc
  • Ciências da Natureza

    Biologia

    Analise a fórmula que representa a estrutura molecular da adrenalina.



    Imagem da questão de Biologia, UNESP 2024, Moléculas, células e tecidos



    A adrenalina, fórmula molecular             , é um hormônio produzido e secretado pelas glândulas             . Na estrutura desse hormônio, nota-se a presença da função orgânica nitrogenada denominada             .


    As lacunas do texto são preenchidas, respectivamente, por

    Escolha uma alternativa para a questão 9be3921f-31
  • Linguagens

    Inglês

    Mobile milestones: how your phone
    became an essential part of your life


    Imagem da questão de Inglês, UNIFESP 2017, Interpretação de texto | Reading comprehension



        Has any device changed our lives as much, and as quickly, as the mobile phone? There are people today for whom the world of address books, street atlases and phone boxes seems very far away, lost in the mists of time. Following, there are just some of the big milestones from the past 30 years that have made almost everything we do easier, more public and very, very fast.
    • The first phones arrive – and become status symbols Few people got the chance to use the very early mobile phones. The first call was made in New York in 1973, but handsets with a network to use were not available until 1983 in the US, and 1985 in the UK. That first British mobile phone was essentially a heavy briefcase with a receiver attached by a wire. It cost £2,000 (£5,000 in today’s prices), and gave you half an hour’s chat on an overnight charge. Making a call was not something you could do subtly, but that wasn’t the point; the first handsets were there to be seen. They sent a message that you were bold and confident with new technology, that you were busy and important enough to need a mobile phone, and were rich enough to buy one.
    • Text messages spawn a whole new language
        The first mobiles worked with analogue signals and could only make phone calls, but the digital ones that followed in the early 1990s could send SMS messages as well. After the first message was sent on 3 December 1992, texting took off like a rocket, even though it was still a pretty cumbersome procedure. Handsets with predictive text would make things easier, but in the 1990s you could save a lot of time by removing all excess letters from a message, often the vowels, and so txtspk ws brn. Today the average mobile phone sends more than 100 texts per month.
    • Phones turn us all into photographers...
        There seemed to be no good reason for the first camera phones, which began to appear in 2002, with resolutions of about 0.3 megapixels. They took grainy, blurry pictures on postage stamp-sized screens, and even these filled the phone’s memory in no time. Gradually, though, as the quality improved, the uses followed. As well as the usual photos of friends and family, they were handy for “saving” pieces of paper, and in pubs you could take a picture of the specials board and take it back to your table. Modern camera phones have changed beyond recognition in the past 20 years. The new mobile phones boast the highest resolution dual camera on a smartphone: a 16-megapixel camera and a 20-megapixel camera side-by-side. The dual camera allows users to focus on their subjects, while blurring out the background, producing professional-looking portraits.
    • …and we turn ourselves into celebrities
        Twenty years ago people would have thought you a little strange if you took flattering photos of yourself and your lifestyle and then distributed them to your friends – let alone to members of the public. If you used printed photographs rather than a smartphone app, they would still think so today. Yet sharing our lives on social media is now the norm, not the exception – and it was the camera phone that made it all possible. Now, some phones come with an enormous 64GB of memory, so you can capture, share and store an almost countless number of videos and pictures – well, certainly enough to keep up with the Kardashians.

    (www.theguardian.com, 07.07.2017. Adaptado.)
    According to the third paragraph, people started to shorten words when writing messages by mobile phone because
    Escolha uma alternativa para a questão 9be4ad73-dd
  • Linguagens

    Inglês

    Figura 1 de 2 da questão de Inglês, Universidade Estadual de Montes Claros - MG 2018, Interpretação de texto | Reading comprehension

    Figura 2 de 2 da questão de Inglês, Universidade Estadual de Montes Claros - MG 2018, Interpretação de texto | Reading comprehension

    Fonte: GANDER, Kashmira. Psychopaths can’t tell if a person is genuinely sad or afraid, study sugests. Disponível em:<https://www.newsweek.com/psychopaths-cant-tell-if-person-genuinely-sad-or-afraid-study-suggests-1055599>. Publicado em: 8 março 2018. Acesso em: 14 out. 2018.

    De acordo com o texto, podemos afirmar que:
    Escolha uma alternativa para a questão 9be4fe70-04
  • Ciências da Natureza

    Química

    Em uma solução aquosa de cianeto de sódio (NaCN), ocorrem os seguintes equilíbrios simultâneos:



    Imagem da questão de Química, UNESP 2024, Equilíbrio Químico



    O cianeto de hidrogênio (HCN) é um gás extremamente tóxico, que pode ser fatal quando inalado. Para minimizar o escape desse gás para a atmosfera, recomenda-se

    Escolha uma alternativa para a questão 9be63700-31
  • Linguagens

    Inglês

    Mobile milestones: how your phone
    became an essential part of your life


    Imagem da questão de Inglês, UNIFESP 2017, Vocabulário | Vocabulary



        Has any device changed our lives as much, and as quickly, as the mobile phone? There are people today for whom the world of address books, street atlases and phone boxes seems very far away, lost in the mists of time. Following, there are just some of the big milestones from the past 30 years that have made almost everything we do easier, more public and very, very fast.
    • The first phones arrive – and become status symbols Few people got the chance to use the very early mobile phones. The first call was made in New York in 1973, but handsets with a network to use were not available until 1983 in the US, and 1985 in the UK. That first British mobile phone was essentially a heavy briefcase with a receiver attached by a wire. It cost £2,000 (£5,000 in today’s prices), and gave you half an hour’s chat on an overnight charge. Making a call was not something you could do subtly, but that wasn’t the point; the first handsets were there to be seen. They sent a message that you were bold and confident with new technology, that you were busy and important enough to need a mobile phone, and were rich enough to buy one.
    • Text messages spawn a whole new language
        The first mobiles worked with analogue signals and could only make phone calls, but the digital ones that followed in the early 1990s could send SMS messages as well. After the first message was sent on 3 December 1992, texting took off like a rocket, even though it was still a pretty cumbersome procedure. Handsets with predictive text would make things easier, but in the 1990s you could save a lot of time by removing all excess letters from a message, often the vowels, and so txtspk ws brn. Today the average mobile phone sends more than 100 texts per month.
    • Phones turn us all into photographers...
        There seemed to be no good reason for the first camera phones, which began to appear in 2002, with resolutions of about 0.3 megapixels. They took grainy, blurry pictures on postage stamp-sized screens, and even these filled the phone’s memory in no time. Gradually, though, as the quality improved, the uses followed. As well as the usual photos of friends and family, they were handy for “saving” pieces of paper, and in pubs you could take a picture of the specials board and take it back to your table. Modern camera phones have changed beyond recognition in the past 20 years. The new mobile phones boast the highest resolution dual camera on a smartphone: a 16-megapixel camera and a 20-megapixel camera side-by-side. The dual camera allows users to focus on their subjects, while blurring out the background, producing professional-looking portraits.
    • …and we turn ourselves into celebrities
        Twenty years ago people would have thought you a little strange if you took flattering photos of yourself and your lifestyle and then distributed them to your friends – let alone to members of the public. If you used printed photographs rather than a smartphone app, they would still think so today. Yet sharing our lives on social media is now the norm, not the exception – and it was the camera phone that made it all possible. Now, some phones come with an enormous 64GB of memory, so you can capture, share and store an almost countless number of videos and pictures – well, certainly enough to keep up with the Kardashians.

    (www.theguardian.com, 07.07.2017. Adaptado.)
    No trecho do terceiro parágrafo “by removing all excess letters from a message, often the vowels, and so txtspk ws brn”, o termo em destaque indica ideia de
    Escolha uma alternativa para a questão 9be8a461-dd
  • Ciências da Natureza

    Física

    Em 1932, James Chadwick descobriu o nêutron pelo bombardeamento do isótopo berílio-9 com partículas α, conforme a equação nuclear:


    Imagem da questão de Física, UNESP 2024, Física Moderna



    O número de nêutrons do isótopo X formado nesse bombardeamento é
    Escolha uma alternativa para a questão 9be8ce71-31
  • Linguagens

    Inglês

    Figura 1 de 2 da questão de Inglês, Universidade Estadual de Montes Claros - MG 2018, Interpretação de texto | Reading comprehension

    Figura 2 de 2 da questão de Inglês, Universidade Estadual de Montes Claros - MG 2018, Interpretação de texto | Reading comprehension

    Fonte: GANDER, Kashmira. Psychopaths can’t tell if a person is genuinely sad or afraid, study sugests. Disponível em:<https://www.newsweek.com/psychopaths-cant-tell-if-person-genuinely-sad-or-afraid-study-suggests-1055599>. Publicado em: 8 março 2018. Acesso em: 14 out. 2018.

    De acordo com o texto, é INCORRETO afirmar que:
    Escolha uma alternativa para a questão 9bea5ea9-04
  • Ciências da Natureza

    Química

    A hidrazina (N2 H4), substância utilizada como propelente de foguetes, sofre combustão conforme a equação:

    N2 H4 + O2  →  N2 + 2H2O


    A tabela apresenta alguns valores de entalpias de ligação envolvidas nessa reação.


    Imagem da questão de Química, UNESP 2024, Transformações Químicas e Energia


    Utilizando os dados tabelados, calcula-se que a combustão de 1 mol de hidrazina irá liberar
    Escolha uma alternativa para a questão 9beb7109-31