Question

Докажите где больше кислорода в 36 г воды H2O или в 44 г углекислого газа CO2

Answer 1

Одинаковое количество 2 моль атомов в двух молях воды (36:18=2моль) и 2 моль атомов в 1 моль СО2(44:44=1моль).

Answer 2

Массовая доля кислорода в молекуле Н2О равна
W(O)= 16/18 = 8/9
36*8/9=4*8= 32г кислорода в 36 г воды

массовая доля кислорода в молекуле CO2
W(O2)= 16*2/(16*2+12) = 32/44 = 8/11
44*8/11 = 4*8 = 32 г кислорода в 44 г углекислого газа

количество одинаково в итоге

Answer 3

Comparison of Oxygen Content in Water (H2O) and Carbon Dioxide (CO2)

To determine where there is more oxygen content, we can compare the molecular weights of water (H2O) and carbon dioxide (CO2). The molecular weight of water is 18 grams per mole, while the molecular weight of carbon dioxide is 44 grams per mole.

Since we are given the masses of 36 grams of water and 44 grams of carbon dioxide, we can calculate the number of moles for each substance using their respective molecular weights.

For water (H2O): - Molecular weight: 18 grams per mole - Mass given: 36 grams - Number of moles: 36 grams / 18 grams per mole = 2 moles

For carbon dioxide (CO2): - Molecular weight: 44 grams per mole - Mass given: 44 grams - Number of moles: 44 grams / 44 grams per mole = 1 mole

Now, let's compare the number of moles of oxygen in each substance.

For water (H2O): - Formula: H2O - Number of oxygen atoms per molecule: 1 - Number of moles of oxygen: 2 moles * 1 oxygen atom = 2 moles

For carbon dioxide (CO2): - Formula: CO2 - Number of oxygen atoms per molecule: 2 - Number of moles of oxygen: 1 mole * 2 oxygen atoms = 2 moles

From the calculations, we can see that both water (H2O) and carbon dioxide (CO2) contain the same number of moles of oxygen, which is 2 moles.

Therefore, both 36 grams of water (H2O) and 44 grams of carbon dioxide (CO2) contain the same amount of oxygen.

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