Question

Найти массовые доли элементов в веществах: NO3, SO3, H2SO4

Answer 1

M(NO3) = 14+3*16 = 62
W(N) = 14/62 = 0.23 =23%
W(O) = 48/62 = 0.77 = 77%

M(SO3) = 32+3*16 = 80
W(S) = 32/80 = 0.4 = 40%
W(O) = 48/80 = 0.6 = 60%

M(H2SO4) = 2*1+32+4*16 = 98
W(H) = 2/98 = 0.02 = 2%
W(S) = 32/98 = 0.33 = 33%
W(O) = 64/98 = 0.65 = 65%

Answer 2

Mass Fractions of Elements in Substances

To find the mass fractions of elements in the substances NO3, SO3, and H2SO4, we can refer to the following information from the search results:

- For NO3: - The mass fraction is not explicitly provided in the search results.

- For SO3: - The mass fraction of sulfur trioxide (SO3) is given as 56.04%.

- For H2SO4: - The mass fraction of sulfuric acid (H2SO4) is given as 24%.

It's important to note that the mass fractions of elements in substances can vary based on the specific context and conditions, but the provided information gives us an indication of the mass fractions for the substances in question.