Question

Quantos mols estão presentes em?

Answer 1

Bom dia!

a) Calculo da massa molar :

H₂O = 1* 2 + 16 => 18 g/mol

1 mol H₂O ------------ 18 g
n mol-------------------- 90 g

n = 90 * 1 / 18

n = 90 / 18

n = 5,0 mols
_________________________________________

b) C₃H₄O₃ = 12 * 3 + 1 * 4 + 16 * 3 => 88 g/mol

1 mol C₃H₄O₃----------------------- 88 g
n mol ---------------------------------532g

n = 532 * 1 / 88

n = 532 / 88

n = 6,04 mols
__________________________________________________

c) CaCO₃ = 40 + 12 + 16 * 3 => 100 g/mol

1 mol CaCO₃-------------------- 100g
n mol------------------------------ 100 g

n = 100 * 1 / 100

n = 100 / 100

n = 1,0 mol
_____________________________________________________

d) CH₃ = 12 + 1 * 3 => 15 g/mol

1 mol CH₃ ---------------- 15 g
n mol -----------------------135 g

n = 135 * 1 / 15

n = 135 / 15

n = 9,0 mols
________________________________________________________