Question

How many liters of oxygen gas, at standard temperature and pressure, will react with 25.0 grams of magnesium metal? Show all of the work used to solve this problem.

2 Mg + O2 ----> 2 MgO

Answer 1

25.0g Mg * (1 mol Mg/24.3050 g Mg) * (1 mol O2/2 mol Mg) * (22.4L O2/1 mol O2)= 11.5L O2

Answer 2

where did 22.4 L of oxygen gas come from?

Answer 3

It's standard. Whenever you convert, 1mole of any volume of gas is always 22.4L

Answer 4

Just like Avogadro's number: 6.02*10^23 particles

Answer 5

ooo.. ok.. thankyou. just wanted to understand. Thank you so much.

Answer 6

:) Yup! No problem!