Explanation:
proton number and neutron number sums up to form the mass number
Answer:
1) <em>C</em> NaOH = 0.763 M
Explanation:
- H2SO4 + 2 NaOH → 2 H2O + Na2SO4
∴ V NaOH = 49.7 mL = 0.0497 L
∴ m H2SO4 = 1.86 g
∴ V sln = 20.00 ml = 0.020 L
∴ Mw H2SO4 = 98.079 g/mol
⇒ n H2SO4 = (1.86 g)(mol / 98.079 g) = 0.019 mol H2SO4
⇒ n NaOH = (0.019 mol H2SO4)(2 mol NaOH/ mol H2SO4) = 0.038 mol NaOH
⇒ <em>C</em> NaOH = 0.038 mol / 0.0497 L = 0.763 M
Answer:
69mol
Explanation:
The balanced chemical equation given in this question is as follows;
N₂ + 3H₂ → 2NH₃
The above balanced equation shows that 3 moles of hydrogen gas (H2) reacts to produce 2 moles of ammonia (NH3).
To convert the given mass of hydrogen to moles, we use the following formula:
mole = mass/molar mass
Molar mass of H2 = 2g/mol
mole = 207/2
= 103.5mol
If 3 moles of H2 produce 2 moles of NH3,
Then, 103.5mol of H2 will produce 103.5 × 2 / 3
= 207/3
= 69mol