Methane gas is produced from the reaction of solid carbon and hydrogen gas: c(s)+2h2(g)→ch4(g) . how many liters of hydrogen gas at standard temperature and pressure (stp) are required to produce 40 liters of methane?

80 liters

Explanation:

At STP, 1 mole of ideal gas has a volume of 22.4 liters.

Therefore, since liters and moles are directly proportional, we can use stoichiometry directly.

40L CH₄ × (2L H₂ / 1L CH₄) = 80L H₂

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

answer; 4 electrons;