Question

In 20 L of air, there is about 0.78 L of carbon dioxide. About how many liters of carbon dioxide are there in 1 L of air?

Answer 1

Answer:

20: 0.78 = 1: 0.039

Step-by-step explanation:

Just divided 20 until you get to 1.

20 ÷ 20 = 1

0.78 ÷ 20 =  0.039.

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Answer 2

Steps:

So for this we will be setting up a proportion. Since we know that for 20 L of air there is 0.78 L of CO₂, we can determine that for 1 L of air there is X L of CO₂ . We can set that up as such:

$\frac{20}{0.78}=\frac{1}{x}$

From here we can solve for x. Firstly, cross-multiply:

$20x=0.78$

Next, divide both sides by 20:

$x=0.039$

Answer:

For 1 L of air, there is 0.039 L of CO₂