Question

so if you had 18 grams of h2o (water) how many moles of water molecules do you have? by the way 18 grams of water is about 18 ml (0.018 l) 1 mole of h2o molecules 16 mole of h2o molecules 18 mole of h2o molecules

Explanation:

Step1: Calculate molar mass of H₂O

Molar mass of H: \( 1.008 \, \text{g/mol} \), O: \( 15.9994 \, \text{g/mol} \).
For H₂O: \( 2 \times 1.008 + 15.9994 = 2.016 + 15.9994 = 18.0154 \, \text{g/mol} \approx 18 \, \text{g/mol} \).

Step2: Use moles formula

Moles \( = \frac{\text{mass}}{\text{molar mass}} \).
Mass = 18 g, molar mass ≈ 18 g/mol.
So, moles \( = \frac{18}{18} = 1 \, \text{mole} \).

Answer:

1 mole of H2O molecules