Question

convert moles to grams in each of the following:

1. 1.5 moles nh₃

n: 14.01 h 1.008×3
14 (17.03g)
1.5 mol×17.03g/mol = 25.55g
25.6g

1. 0.65 moles h₂so₄

h 1.008×2 s: 32.07 o: 16.00
mm 2.016 + 32.07+64 = 98.0
0.65 mol×98.086 g/mol=
63.8

1. 7.5 moles na

na: 22.99 g/mol
7.5 mol×22.99g/mol≈172.43g
172g

1. 2.4 moles co₂

c: 12.01
o 16.00×2
mass = 12.01+32 = 44.01g/mol
2.4 mol×44.01 g/mol≈105.
106g

1. 2.56 moles ca
2. 0.75 moles alcl₃

al 26.98
cl 35.45×3
mm 26.98 + 106.35 = 133.
0.75 mol×133.33g/mol
100g

Explanation:

Step1: Calculate molar mass of NH₃

Molar mass = 14.01 + 3×1.008 = 17.034 g/mol

Step2: Compute mass of NH₃

Mass = 1.5 mol × 17.034 g/mol ≈ 25.55 g ≈ 25.6 g

Step1: Calculate molar mass of H₂SO₄

Molar mass = 2×1.008 + 32.07 + 4×16.00 = 98.086 g/mol

Step2: Compute mass of H₂SO₄

Mass = 0.65 mol × 98.086 g/mol ≈ 63.756 g ≈ 63.8 g

Step1: Molar mass of Na

Molar mass = 22.99 g/mol

Step2: Compute mass of Na

Mass = 7.5 mol × 22.99 g/mol = 172.425 g ≈ 172 g

Step1: Calculate molar mass of CO₂

Molar mass = 12.01 + 2×16.00 = 44.01 g/mol

Step2: Compute mass of CO₂

Mass = 2.4 mol × 44.01 g/mol = 105.624 g ≈ 106 g

Step1: Molar mass of Ca

Molar mass = 40.08 g/mol

Step2: Compute mass of Ca

Mass = 2.56 mol × 40.08 g/mol ≈ 102.60 g ≈ 103 g

Step1: Calculate molar mass of AlCl₃

Molar mass = 26.98 + 3×35.45 = 133.33 g/mol

Step2: Compute mass of AlCl₃

Mass = 0.75 mol × 133.33 g/mol = 99.9975 g ≈ 100 g

Answer:

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