Question

question 1
how many moles of of water are in 25.0 grams of water?

1. mol h₂o

4.15e - 23 mol h₂o
0721 mol h₂o
1.39 mol h₂o

Explanation:

Step1: Calculate molar mass of water

The formula for water is \(H_2O\). The molar mass of \(H\) is \(1.008\space g/mol\) and of \(O\) is \(16.00\space g/mol\).
\(M = 2\times1.008+16.00= 18.016\space g/mol\)

Step2: Use formula \(n=\frac{m}{M}\)

Given \(m = 25.0\space g\) and \(M=18.016\space g/mol\)
\(n=\frac{25.0}{18.016}\approx1.39\space mol\)

Answer:

1.39 mol \(H_2O\)