Mole Concept

Question

The mass percent of nitrogen in NH4 NO3 (Atomic masses: N=14, H=1, O=16) is:

RankGuru · Accepted Answer

1. **Calculate Molar Mass of $NH_4NO_3$**:
   - $M = 2 	imes 14 (N) + 4 	imes 1 (H) + 3 	imes 16 (O)$
   - $M = 28 + 4 + 48 = 80 \ g/mol$.
2. **Determine Mass of Nitrogen**:
   - There are 2 atoms of Nitrogen in the formula unit.
   - $Mass \ of \ N = 2 	imes 14 = 28 \ g$.
3. **Calculate Mass Percent**:
   - $Percent \ = \frac{28}{80} 	imes 100 = 0.35 	imes 100 = 35\%$.

Rank Guru

Mole Concept

Select the correct option:

Solution

🔒 Solution Hidden from View

More mole concept Practice Questions

How many moles of oxygen atoms are present in 5.0 g of CaCO3? (Atomic masses: Ca=40, C=12, O=16)

The density of a gas at STP is 1.25 g L⁻¹. Its molar mass is approximately:

When 9.0 g of aluminium reacts completely with oxygen, how many grams of Al2O3 are formed? (2Al + 3/...

Which statement correctly defines molality?

0.50 mol of CaCO3 is heated strongly. How many liters of CO2 (at STP) are evolved? (CaCO3 → CaO + CO...

About This Question