{"id":20622,"date":"2024-11-12T22:36:53","date_gmt":"2024-11-13T01:36:53","guid":{"rendered":"https:\/\/xequematenem.com.br\/blog\/?p=20622"},"modified":"2024-11-13T21:26:52","modified_gmt":"2024-11-14T00:26:52","slug":"questao-97-enem-2024","status":"publish","type":"post","link":"https:\/\/xequematenem.com.br\/blog\/questao-97-enem-2024\/","title":{"rendered":"Quest\u00e3o 097 \u2013 ENEM 2024"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">O soro caseiro serve para combater a desidrata\u00e7\u00e3o por meio da reposi\u00e7\u00e3o da \u00e1gua e sais minerais perdidos, por exemplo, por diarreia. Uma receita simples para a sua prepara\u00e7\u00e3o consiste em utilizar duas colheres grandes (de sopa) de a\u00e7\u00facar e duas colheres pequenas (de caf\u00e9) de sal de cozinha, dissolvidos em 2 L de \u00e1gua fervida, obtendo-se uma solu\u00e7\u00e3o com concentra\u00e7\u00e3o de \u00edon s\u00f3dio de 1,4 mg\/mL.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Considere as massas molares: NaCl = 58,5 g\/mol; Na = 23 g\/mol.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Qual \u00e9 o valor mais pr\u00f3ximo da massa, em grama, de cloreto de s\u00f3dio presente em uma \u00fanica colher pequena?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A) 0,7 g&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B) 1,8 g&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C) 2,8 g<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D) 3,6 g&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E) 7,0 g<\/p>\n\n\n\n<p class=\"has-text-align-center has-large-font-size wp-block-paragraph\"><strong>Solu\u00e7\u00e3o<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Duas colheres pequenas de sal de cozinha dissolvidas em 2 litros de \u00e1gua resultam em uma solu\u00e7\u00e3o com concentra\u00e7\u00e3o de \u00edons s\u00f3dio de 1,4 mg por mililitro, equivalente a 1,4 g por litro de solu\u00e7\u00e3o. Como foram adicionadas 2 colheres pequenas em 2 litros de \u00e1gua, isso corresponde a 1 colher de sal por litro de solu\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Em 1 mol de NaCl temos 1 mol de \u00edons s\u00f3dio, portanto<strong> <\/strong>o valor mais pr\u00f3ximo da massa, em grama, de cloreto de s\u00f3dio presente em uma \u00fanica colher pequena \u00e9 dado por:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1 mol de NaCl&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1 mol de Na<sup>+<\/sup><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">58,5 g&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- 23 g de Na<sup>+<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">x &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211; 1,4 g de Na<sup>+<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">x = 3,6 g de NaC<em>l<\/em><em><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Alternativa D<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O soro caseiro serve para combater a desidrata\u00e7\u00e3o por meio da reposi\u00e7\u00e3o da \u00e1gua e sais minerais perdidos, por exemplo, por diarreia. Uma receita simples para a sua prepara\u00e7\u00e3o consiste em utilizar duas colheres grandes (de sopa) de a\u00e7\u00facar e duas colheres pequenas (de caf\u00e9) de sal de cozinha, dissolvidos em 2 L de \u00e1gua [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[151,17],"tags":[],"area-do-conhecimento":[116,120],"assunto":[],"class_list":["post-20622","post","type-post","status-publish","format-standard","hentry","category-2024-questoes-enem-regular","category-questoes-do-enem","area-do-conhecimento-ciencias-da-natureza-e-suas-tecnologias","area-do-conhecimento-quimica"],"_links":{"self":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/20622","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/comments?post=20622"}],"version-history":[{"count":2,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/20622\/revisions"}],"predecessor-version":[{"id":20864,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/20622\/revisions\/20864"}],"wp:attachment":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/media?parent=20622"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/categories?post=20622"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/tags?post=20622"},{"taxonomy":"area-do-conhecimento","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/area-do-conhecimento?post=20622"},{"taxonomy":"assunto","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/assunto?post=20622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}