When compound Y is heated, it decomposes to the element X and hydrogen gas. Decomposition of 1g of Y yields 0.0250 mol of gas. Calculate the possible molar mass values for X.
a. 10, 20 and 30g/mol
b. 30,40 and 50g/mol
c. 20, 40 and 60 g/mol
d. 40, 80 and 120 g/mol
e. 15, 30 and 45 g/mol
f. 30, 50 and 70g/mol