Antarctica is around fifty times the size of - id42354576 от Glebborg 03.06.2021 19:13

Question

Химия: Antarctica is around fifty times the size of the UK and it is where the South Pole is. Ice Antarctica and 1) snow cover most of Antarctica and it is very cold. It is the coldest place on Earth. It doesn t 2) desert. Its 3) very much so Antarctica is actually a lasts from March to August and it is dark all day long. In it never gets dark. People don t live in Antarctica but some animals do. You 4) can find 5) on the ice and 6) ответьте только правильно​

Glebborg · Accepted Answer

Дано: m(p-pa naoh) = 120 г ω(naoh) = 5%=0,05 знайти: m(nh2ch2-cooh) - ? рішення. m(naoh) = m(p-pa naoh)×ω(naoh) m(naoh) = 120 г×0,05 = 6 г m(naoh) = 40 г/моль n(naoh) = m(naoh)/m(naoh) n(naoh) = 6 г/40 г/моль = 0,15 моль m(nh2ch2cooh) = 75 г/моль nh2ch2-cooh + naoh = nh2ch2coona + h2o з рівняння реакції слідує, що n(nh2ch2-cooh) = n(naoh) = 0,15 моль m(nh2ch2-cooh) = n(nh2ch2-cooh)×m(nh2ch2-cooh) m(nh2ch2-cooh) = 0,15 моль × 75 г/моль = 11,25 г відповідь: 11,25 г...

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