Answer to Question #132931 in Chemistry for asd

Question

How many molecules of water are there in 72g of H2O

Answer 1

M (H₂O) = 18 g/mol

n (H₂O)=m/M=72/18=4 moles

Each mole of matter contains 6.022×10²³ molecules.

Number of molecules in 72 g of water is:

6.022×10²³ x 4 = 24.088 ×10²³ molecules