Question

How many moles of oxygen will occupy a volume of 2.50 liters?

Answer 1

Data:
n (number of mols) = ?
V (volume) = 2.50 Liters
If:
1 L → 1000 g
2.50 L → y

y = 1000*2.50 = 2500 g

Therefore:
m (mass) = 2500 g

Now:
Molar Mass (MM) of oxygen = 16 g/mol

Formula:

`n = (m)/(MM)`

Solving:

`n = (m)/(MM)`

`n = (2500\:\diagup\!\!\!\!\!g)/(16\:\diagup\!\!\!\!\!g/mol)`

`\boxed{\boxed{n = 156.25\:mols}}\end{array}}\qquad\quad\checkmark`