Homework Help: chem h

Posted by Skye on Monday, December 5, 2011 at 11:44pm.

Methanol (CH3OH) is used in the production of many chemicals. methanol is made by reacting carbon monoxide and hydrogen at high temperature and pressure.

CO(g) + 2H2(g) ==> CH3OH(g)

a) How many moles of each reactant are needed to produce 3.60 x 10^2 g CH3OH?
b)Calculate the number of grams of each reactant needed to produce 4.00 mol CH3OH.
c)How many grams of hydrogen are necessary to react with 2.85 mol CO?

chem h - DrBob222, Tuesday, December 6, 2011 at 12:15am
Convert 360 g CH3OH to moles. moles = g/molar mass = about 360/32 about 11 moles but you need to do it more accurately than my estimates.
You will need 11 moles CH3OH x (1 mole CO/1 mole CH3OH) = 11 x 1/1 = about 11 moles CO

11 moles CH3OH x (2 moles H2/1 mole CH3OH) = 11 x 2/1 = about 22 moles H2.

b. Convert moles to grams. g = moles x molar mass
c. 2.85 mol CO x (2 moles H2/1 mol CO = 2.85 x (2/1) = about 5.7 moles H2. Convert to grams.

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