How many moles are in 10 grams of NaOH?

How many moles are in 10 grams of NaOH?

Correct Answer: 0.25 moles

Step 1: Find the molar mass of NaOH. This is done by adding the atomic masses of sodium (Na), oxygen (O), and hydrogen (H). Sodium has a mass of 23 g/mol, oxygen has a mass of 16 g/mol, and hydrogen has a mass of 1 g/mol.
Step 2: Calculate the total molar mass: 23 g/mol (Na) + 16 g/mol (O) + 1 g/mol (H) = 40 g/mol.
Step 3: Use the formula to find the number of moles: Number of moles = mass (in grams) / molar mass (in g/mol).
Step 4: Plug in the values: Number of moles = 10 g / 40 g/mol.
Step 5: Calculate the result: 10 g / 40 g/mol = 0.25 moles.

Molar Mass Calculation – Understanding how to calculate the molar mass of a compound by summing the atomic masses of its constituent elements.
Mole Concept – Applying the mole concept to convert mass of a substance to the number of moles using the formula: moles = mass / molar mass.