Answer:
8.098 x 10²² molecules
Step-by-step explanation:
1. Calculate the moles of the compound.
C3H6 = (3 x 12) + (6 x 1) = 42
5.65 ÷ 42 = 0.1345
2. Multiply.
In order to find the number of molecules in the sample, we must multiply the number moles of the compound with the avogadro's constant.
0.1345 x 6.02 x 10²³
= 8.098 x 10²²