How many molecules are there in 31.8 moles of water? 1.91 x 1025 molecules
1.91 x 1022
5.28 x 10-23 molecules
5.28x 10.25

Explanation:

Given

31.8 moles of water

Required

Determine the number of molecule

In standard units: 1 molecule of water is:

Multiply both sides by 31.8

Express 191.4996 as a standard form

Apply law of indices:

Approximate:

answer; ///(d) the correct answer is double or triple