Question

convert moles to grams in each of the following:

1. 1.5 moles nh₃
2. 0.65 moles h₂so₄
3. 7.5 moles na
4. 2.4 moles co₂
5. 2.56 moles ca
6. 0.75 moles alcl₃

Explanation:

11. Step1: Molar mass of NH₃

N:14.01, H:1.008×3. Molar mass=14.01+3.024=17.034 g/mol

Step2: Mass calculation

1.5 mol ×17.034 g/mol≈25.55 g

12. Step1: Molar mass of H₂SO₄

H:1.008×2, S:32.07, O:16.00×4. Molar mass=2.016+32.07+64=98.086 g/mol

Step2: Mass calculation

0.65 mol ×98.086 g/mol≈63.76 g

13. Step1: Molar mass of Na

Na:22.99 g/mol

Step2: Mass calculation

7.5 mol ×22.99 g/mol≈172.43 g

14. Step1: Molar mass of CO₂

C:12.01, O:16.00×2. Molar mass=12.01+32=44.01 g/mol

Step2: Mass calculation

2.4 mol ×44.01 g/mol≈105.62 g

15. Step1: Molar mass of Ca

Ca:40.08 g/mol

Step2: Mass calculation

2.56 mol ×40.08 g/mol≈102.60 g

16. Step1: Molar mass of AlCl₃

Al:26.98, Cl:35.45×3. Molar mass=26.98+106.35=133.33 g/mol

Step2: Mass calculation

0.75 mol ×133.33 g/mol≈100.00 g

Answer:

1. 25.6 g
2. 63.8 g
3. 172 g
4. 106 g
5. 103 g
6. 100 g