For a chemical reaction, you require 1 mole of CH4. Your bottle contains 19 grams. Do you have enough? Pick the statement that is correct.

Answer:
A reaction of 19g of CH4 would yield 1.185mole of CH4, so, yes we have enough
Explanation:
To know if you have enough CH4, let us find the number of mole of CH4. This is illustrated below:
Mass of CH4 = 19g
Molar Mass of CH4 = 12.01 + (1.00784 x 4) = 12.01 + 4.03 = 16.04g/mol
Number of mole = Mass /Molar Mass
Number of mole = 19/16.04 = 1.185moles.
From the calculation above, the number of mole of CH4 obtained is 1.185moles. Therefore, we have enough