Question

0.1 dm³ of argon contains x atoms .How many atoms are there in 0.2 dm³ of hydrogen gas under the same conditions?

Answer 1

Answer:

B.) 2x

Explanation:

Hello,

In this case, we can apply the following rule of three, knowing that 0.1 dm³ equals x and 0.2 dm³ is the unknown:

$0.1dm^3\longrightarrow x\\0.2dm^3 \longrightarrow ?$

Thus, solving for the unknown we find:

$?=\frac{0.2dm^3*x}{0.1dm^3} \\\\?=2*x$

Therefore, the answer is B.) 2x.

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