the volume will be 0.84mol of Y


=

= 0.134 mol
mol of oxygen:
ratio of

= 2 : 15
= 1 : 7.5
: . mol of

= 0.134mol * 7.5
= 1.01 mol
Mass of Oxygen = mol * Mr
= 1.01 mol * (16*2) g/mol
= 32.22g
Note: Mr is molar mass
D is the answer here look
Answer: 15.8 g of
will be required to produce 1.60 grams of 
Explanation:
To calculate the moles :

According to stoichiometry :
As 1 mole of
is given by = 2 moles of 
Thus 0.05 moles of
is given by =
of 
Mass of 
Thus 15.8 g of
will be required to produce 1.60 grams of 