Perform the calculations for: a) the volume of oxygen required for the combustion of 120g of magnesium in the presence of oxygen air;
b)the volume of air where the volume of oxygen is located
c) the number of moles of magnesium oxide obtanied.

2. what volume will occupy under standard contitions:
a)22g hydrogen H2
b)5 mol P2O3

3. what volume will occupy under normal conditions:
a) 0.05 mol CH4
b)3.01×10 23 molecule Cl2

please please help me with the questions in the photo and with the ones that i have written up this text pleasee

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