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

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

stephstar101 · Answer

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

anonymous · Answer

where did 22.4 L of oxygen gas come from?

stephstar101 · Answer

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

stephstar101 · Answer

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

anonymous · Answer

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

stephstar101 · Answer

:) Yup! No problem!