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?

A. )×/2
B.)2x
C.)4x​

Answer 1

B.) 2x

Step-by-step 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:

`?=(0.2dm^3*x)/(0.1dm^3) \\\\?=2*x`

Therefore, the answer is B.) 2x.

Best regards.