Water (H2O) has a molar mass of 18.02 g/mol. What is the amount of water in (mol) equivalent 8.6 g? Show detailed calculations.
The Correct Answer and Explanation is:
To determine the number of moles of water (H2O) in 8.6 g, we can use the following formula:moles=massmolar mass\text{moles} = \frac{\text{mass}}{\text{molar mass}}moles=molar massmass
Where:
- The mass of water is 8.6 g.
- The molar mass of water (H2O) is 18.02 g/mol.
Step 1: Apply the formula
Substitute the known values into the formula:moles=8.6 g18.02 g/mol\text{moles} = \frac{8.6 \, \text{g}}{18.02 \, \text{g/mol}}moles=18.02g/mol8.6g
Step 2: Perform the calculation
Now, divide the mass of water by its molar mass:moles=0.477 mol\text{moles} = 0.477 \, \text{mol}moles=0.477mol
So, 8.6 grams of water is equivalent to approximately 0.477 moles of water.
Explanation:
The molar mass of a compound is the mass of one mole of its molecules, which in the case of water is 18.02 g/mol. This means that one mole of water weighs 18.02 grams. To find how many moles of water are in 8.6 grams, you divide the mass (8.6 g) by the molar mass (18.02 g/mol). The result, 0.477 moles, tells you how many moles of water are in the given mass. Moles are a fundamental concept in chemistry, representing a specific quantity of molecules, atoms, or particles. By converting grams to moles, you can perform further chemical calculations, like determining the number of molecules in a given sample or how much of a substance is needed for a chemical reaction.
