Question

URGENTE
Determime mols e gramas
A- 35 mols de O2
B-120g de KOH
C- 350g de O2

Answer 1

Olá!:

a) Massa molar O₂ = 16 * 2 => 32 g/mol

então:

1 mol O₂ ---------------- 32 g
35 mols O₂ ------------- m

m = 35 * 32 / 1

m = 1120 g de O₂
____________________________________

b) Massa molar KOH = 39 + 16 + 1 => 56 g/mol

1 mol KOH ------------------------ 56 g
n mols KOH ----------------------- 120 g

n = 120 * 1 / 56

n = 2,142 mols de KOH
___________________________________________________

c) Massa molar O₂ = 16 * 2 => 32 g/mol

1 mol O₂ -------------------- 32 g
 n mol O₂ ------------------- 350 g

n = 350 * 1 / 32

n = 10,9375 mols

_________________________________________________


espero ter ajudado!