Answer:
The answer to your question is below
Explanation:
1) number of molecules = x
23 g of CoCl₂
Molar mass CoCl₂ = 59 + 71 = 130 g
130 g ------------------ 6.023 x 10²³ molecules
23 g ----------------- x
x = (23 x 6.023 x 10²³) / 130
x = 1.066 x 10²³ molecules
2)
3.2 moles of H₃PO₄ to grams
Molar mass = 3 + 31 + (16 x 4)
= 98 g
98 g ------------------- 1 mol
x ------------------- 3.2 moles
x = (3.2 x 98)/1
x = 313.6 g
3)
2.2 moles of (NH₄)₂ to grams
Molar mass = (14 x 2) + (8 x 1)
= 36 g
36 g of (NH₄)₂ ---------------- 1 mol
x ---------------- 2.2 moles
x = (2.2 x 36)/1
x = 79.2 grams
4)
Molecules = ? 4.5 g of NH₄SO₂
Molar mass = 14 + 32 + 32 + 4
= 82 g
82 g of NH₄SO₂ --------------- 6.023 x 10²³ molecules
4.5 g ---------------- x
x = (4.5 x 6.023 x 10²³) / 82
x = 3.3 x 10²³ molecules
5)
Liters of N₂ = ? 7.9 x 10³⁰ particles
22.4 l --------------------- 6.023 x 10²³ particles
x -------------------- 7.9 x 10³⁰
x = (7.9 x 10³⁰ x 22.4) / 6.023 x 10²³
x = 2.93 x 10⁸ particles
