Question

# Carbon and oxygen react to form carbon monoxide:$2 \mathrm { C } + \mathrm { O } _ { 2 } \longrightarrow 2 \mathrm { CO }$. What masses of carbon and oxygen are needed to make 56.0 g CO? Which law does this illustrate?

Solutions

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Given equation :

$$$\text{2C + O_2 \rightarrow 2CO}\tag{1}$$$

Based on above-balanced equation, we can write the below relation :

$$$\text{2 mole carbon : 1 mole oxygen : 2 mole CO}\tag{2}$$$

Molecular mass of carbon, oxygen and CO are 12, 32 and 28 respectively.

Also, we know that Mass = moles $\times$ molecular weight, hence we can rewrite equation (1) as :

$$$\text{24 g carbon : 32 g oxygen : 56 g CO}\tag{3}$$$

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