A synthesis reaction takes place when carbon monoxide (CO) and hydrogen gas (H2) react to form methanol (CH3OH). How many grams of methanol are produced when 2.8 grams of carbon monoxide reacts with 0.50 grams of hydrogen gas? (5 points) a
3.2 grams

b
3.6 grams

c
4.0 grams

d
6.0 grams

8 grams

Explanation:edg2021

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a.3.2

Explanation:Balanced chemical reaction:  CO (g) + 2 H2 (g) →  CH3OH (l)

First use stoichiometry to convert grams of CO and H2 to moles of CH3OH to determine which reactant is the limiting reagent.

2.8 g CO x (1 mol CO / 28 g CO) x (1 mol CH3OH / 1 mol CO) = 0.10 mol CH3OH

0.50 g H2 x (1 mol H2 / 2 g H2) x (1 mol CH3OH / 2 mol H2) = 0.13 mol CH3OH

As you can see, CO produces less CH3OH, therefore, it is the limiting reagent.  Now convert 0.10 mol CH3OH to grams CH3OH.

0.10 mol CH3OH x (32 g CH3OH / 1 mol CH3OH) = 3.2 g CH3OH

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