The ratio is 2:1. You need two moles of hydrogen for every mol of O2. The proportion would be written as
2:1::4:x
2/1 = 4/x Cross multiply
2x = 4 Divide by 2
x = 4/2
x = 2
You would need 2 moles of O2 to react with 4 mols of H2
Answer:
(f - g)(2) = -6
Step-by-step explanation:
(f - g)(2) = (-2x + 8) - 5x, where x=2
= (-2(2) + 8) - 5(2)
= (-4 + 8) - 10
= 4 - 10
= -6
(f - g)(2) = -6