Final answer:
In 2 molecules of C₃H₆, there are a total of 12 hydrogen atoms. This is calculated by multiplying the 6 hydrogens in a single molecule by the number of molecules, which is 2.
Step-by-step explanation:
To determine how many hydrogen atoms are there in 2 molecules of C₃H₆, we simply calculate the number by multiplying the number of hydrogen atoms in one molecule by the number of molecules we have. The molecular formula C₃H₆ indicates that there are 6 hydrogen atoms in one molecule of C₃H₆.
So, for 2 molecules of C₃H₆:
Number of hydrogen atoms in 1 molecule = 6
Number of hydrogen atoms in 2 molecules = 6 × 2 = 12 hydrogen atoms