Find number of hydrogen atoms:
1 mol of NH3
1 mol of N2H4
4 mol of NH3
3 mol of N2H4
1 mol of any compound (NH3, N2H4, etc) has 6.02E23 molecules. Then NH3 has 3x that many H atoms, N2H4 has 4 x that many H atoms, etc.
To find the number of hydrogen atoms in a given compound, you need to know the chemical formula of the compound and the number of moles of that compound.
The chemical formula of ammonia (NH3) indicates that there is 1 nitrogen (N) atom and 3 hydrogen (H) atoms in each molecule of ammonia.
1. For 1 mole of NH3:
- Since there are 3 hydrogen atoms in 1 molecule of NH3, in 1 mole of NH3 there will be 3 moles of hydrogen atoms.
- Therefore, the number of hydrogen atoms in 1 mole of NH3 is 3 moles.
2. For 1 mole of N2H4:
- The chemical formula of hydrazine is N2H4, which means there are 2 nitrogen (N) atoms and 4 hydrogen (H) atoms in each molecule of N2H4.
- Since there are 4 hydrogen atoms in 1 molecule of N2H4, in 1 mole of N2H4 there will be 4 moles of hydrogen atoms.
- Therefore, the number of hydrogen atoms in 1 mole of N2H4 is 4 moles.
3. For 4 moles of NH3:
- In this case, you need to multiply the number of moles of NH3 by the number of hydrogen atoms per mole of NH3 (which is 3 moles of H per mole of NH3).
- 4 moles of NH3 x 3 moles of H/mole of NH3 = 12 moles of H.
- Therefore, the number of hydrogen atoms in 4 moles of NH3 is 12 moles of H.
4. For 3 moles of N2H4:
- In this case, you need to multiply the number of moles of N2H4 by the number of hydrogen atoms per mole of N2H4 (which is 4 moles of H per mole of N2H4).
- 3 moles of N2H4 x 4 moles of H/mole of N2H4 = 12 moles of H.
- Therefore, the number of hydrogen atoms in 3 moles of N2H4 is 12 moles of H.