12
During the burning (oxidation) of carbon no hydrogen is released.
depends
Assuming we are at standard temperature and pressure (STP), the answer is approximately 1.85L of hydrogen gas. The HCl is the limiting reactant and the Mg is the excess reactant.
2 to 3 liters.
40 litres of oil / 5 litres cans = 8 cans can be filled with 40 litres of oil.
30 litres of petrol are filled because you're talking about more than one litre (plural).
2/1
21
86/3.5 = 24.57 so answer is 24 complete bottles
yes hydrogen is ductile because if you put a few liters of hydrogen in a few gallons large bottle it would compleate the space
75-80 liters for an average bath- up to about 140 liters if filled to the overflow drain.
About 1246L if filled to the very top.