What is the molar mass of water (H2O)? (2023) 2023

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Question: What is the molar mass of water (H2O)? (2023) 2023

Options:

Correct Answer: 18 g/mol

Exam Year: 2023

Solution:

The molar mass of water is calculated as follows: H (1 g/mol) x 2 + O (16 g/mol) = 2 + 16 = 18 g/mol.

What is the molar mass of water (H2O)? (2023) 2023

What is the molar mass of water (H2O)? (2023) 2023

Step 1: Identify the elements in water (H2O). There are 2 hydrogen (H) atoms and 1 oxygen (O) atom.
Step 2: Find the molar mass of hydrogen. Each hydrogen atom has a molar mass of 1 g/mol.
Step 3: Since there are 2 hydrogen atoms, multiply the molar mass of hydrogen by 2: 1 g/mol x 2 = 2 g/mol.
Step 4: Find the molar mass of oxygen. The molar mass of oxygen is 16 g/mol.
Step 5: Add the total molar mass of hydrogen to the molar mass of oxygen: 2 g/mol (from hydrogen) + 16 g/mol (from oxygen) = 18 g/mol.
Step 6: Conclude that the molar mass of water (H2O) is 18 g/mol.

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