38.7k views
0 votes
How many molecules are in 7 g of H2O

2 Answers

5 votes

Answer:

2.342*10^23

Step-by-step explanation:

# of molecules = Moles * NA

# of molecules = (Mass in grams) / (Molar Mass) * NA

Molar Mass of H2O = 18g/mol

Avogadro's number(NA) = 6.022*10^23

Now,

# of molecules = (7g/18gmol)*(6.022*10^23) = 2.342 * 10^23

User Uerceg
by
7.8k points
1 vote

Answer:

0.38

Explanation:its right bc it is

User Othmane
by
8.5k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.