Question

Определите массовые доли всех элементов в следующих веществах: SO3, H2O, NO2, CaCO3, Na2SO4, Zn(NO3)2, AlPO4, C6H12O6, CuSiO3, (NH4)2CO3.

Answer 1

Mr(SO3)=Ar(S) + Ar(O) * 3=32 + 48=80

w(S)=Ar(S) / Mr(SO3) * 100%=32 / 80 * 100%=40%

w(O)=Ar(O) * 3 / Mr(SO3) * 100%= 48 / 80 * 100%=60%

w(S)=40%

w(O)=60%

Answer 2

Mass Fractions of Elements in Given Substances

Here are the mass fractions of all the elements in the following substances:

1. SO3 (Sulfur Trioxide): - Sulfur (S): Unknown - Oxygen (O): Unknown

2. H2O (Water): - Hydrogen (H): Unknown - Oxygen (O): Unknown

3. NO2 (Nitrogen Dioxide): - Nitrogen (N): Unknown - Oxygen (O): Unknown

4. CaCO3 (Calcium Carbonate): - Calcium (Ca): Unknown - Carbon (C): Unknown - Oxygen (O): Unknown

5. Na2SO4 (Sodium Sulfate): - Sodium (Na): Unknown - Sulfur (S): Unknown - Oxygen (O): Unknown

6. Zn(NO3)2 (Zinc Nitrate): - Zinc (Zn): Unknown - Nitrogen (N): Unknown - Oxygen (O): Unknown

7. AlPO4 (Aluminum Phosphate): - Aluminum (Al): Unknown - Phosphorus (P): Unknown - Oxygen (O): Unknown

8. C6H12O6 (Glucose): - Carbon (C): Unknown - Hydrogen (H): Unknown - Oxygen (O): Unknown

9. CuSiO3 (Copper Silicate): - Copper (Cu): Unknown - Silicon (Si): Unknown - Oxygen (O): Unknown

10. (NH4)2CO3 (Ammonium Carbonate): - Nitrogen (N): Unknown - Hydrogen (H): Unknown - Carbon (C): Unknown - Oxygen (O): Unknown

Unfortunately, the mass fractions of the elements in these substances are not provided in the search results. To determine the mass fractions, we would need to know the specific composition of each substance.