Question

If 3.85 mL of 10.0 M NaOH is used for a reaction, calculate the number of moles of NaOH that were used.

Answer 1

The number of mole of NaOH that was used, given that 3.85 mL of 10.0 M NaOH is used in the reaction is 0.0385 mole

How do I determine the number of mole of NaOH?

We know that molarity is related to number of mole and volume according to the following formula:

Molarity = number of mole / Volume

With the above formula, we can determine the number of mole of NaOH. Details below

The following data were obtained from the question:

• Volume = 3.85 mL = 3.85 / 1000 = 0.00385 L
• Molarity = 10.0 M
• Number of mole of NaOH =?

Molarity = number of mole / Volume

Cross multiply

Number of mole = molarity × volume

Number of mole of NaOH = 10 × 0.00385

Number of mole of NaOH = 0.0385 mole

Thus, the number of mole of NaOH is 0.0385 mole

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