# Problem: How many  C2H4  molecules are contained in 45.8 mg of  C 2H4 ? The molar mass of  C2H4  is 28.05 g/mol. A) 2.71× 10 20 C2H4 molecules B) 9.83 × 10 20  C2H4  molecules C) 7.74 × 10 26  C2H4  molecules D) 4.69 × 10 23  C2H4 molecules E) 3.69 × 10 23  C2H4  molecules

###### FREE Expert Solution
100% (87 ratings)
###### Problem Details

How many  C2H molecules are contained in 45.8 mg of  C 2H? The molar mass of  C2H is 28.05 g/mol.

A) 2.71× 10 20 C2H4 molecules

B) 9.83 × 10 20  C2H molecules

C) 7.74 × 10 26  C2H molecules

D) 4.69 × 10 23  C2Hmolecules

E) 3.69 × 10 23  C2H molecules

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mole Concept concept. You can view video lessons to learn Mole Concept. Or if you need more Mole Concept practice, you can also practice Mole Concept practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofHow many  C2H4  molecules are contained in 45.8 mg of  C 2H4...as medium difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Dasha took 3 minutes and 1 second to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Flores' class at UCF.