Question

You are given 12.2 g of NaOH. Determine the number of moles of NaOH.

0.5 mol
O 0.31 mol
O 487.96 mol

Answer 1

Given:

mass = 12.2 g NaOH

Required:

n

Solution:

Step 1: Calculate the molar mass of NaOH.

molar mass = (22.99 g/mol × 1) + (16.00 g/mol × 1) + (1.008 g/mol × 1)

molar mass = 39.998 g/mol

Step 2: Calculate the number of moles of NaOH.

n = mass / molar mass

n = 12.2 g / 39.998 g/mol

n = 0.31 mol

Therefore, the number of moles of NaOH is 0.31 mol.

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Answer 2

Answer:

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Explanation:

Calculate the molar mass of NaOH.

molar mass = (22.99 g/mol × 1) + (16.00 g/mol × 1) + (1.008 g/mol × 1)

molar mass = 39.998 g/mol

Step 2: Calculate the number of moles of NaOH.

n = mass / molar mass

n = 12.2 g / 39.998 g/mol

n = 0.31 mol

Therefore, the number of moles of NaOH is 0.31 mol.