How many moles of water are present in 36 grams of H_2O?

• A. 0.5 moles
• B. 18 moles
• C. 1 mole
• D. 2 moles

Answer: (D)

Verified step by step guidance

1. Identify the molar mass of water (H\_2O) by adding the atomic masses of its elements: hydrogen (H) and oxygen (O). Since water has 2 hydrogen atoms and 1 oxygen atom, calculate the molar mass as: \$2 \times 1.008 + 16.00$ grams per mole.
2. Calculate the molar mass of water using the values from step 1 to find the total grams per mole of H\_2O.
3. Use the formula to find moles from mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
4. Substitute the given mass of water (36 grams) and the molar mass calculated in step 2 into the formula from step 3.
5. Perform the division to find the number of moles of water present in 36 grams.