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How many grams of NaOH are needed to prepare 0.5 moles of NaOH solution?

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Question: How many grams of NaOH are needed to prepare 0.5 moles of NaOH solution?

Options:

  1. 20 g
  2. 40 g
  3. 10 g
  4. 30 g

Correct Answer: 40 g

Solution: 

The molar mass of NaOH is 40 g/mol. Therefore, to prepare 0.5 moles, you need 0.5 x 40 g = 20 g.

How many grams of NaOH are needed to prepare 0.5 moles of NaOH solution?

Practice Questions

Q1
How many grams of NaOH are needed to prepare 0.5 moles of NaOH solution?
  1. 20 g
  2. 40 g
  3. 10 g
  4. 30 g

Questions & Step-by-Step Solutions

How many grams of NaOH are needed to prepare 0.5 moles of NaOH solution?
  • Step 1: Find the molar mass of NaOH. The molar mass is 40 g/mol.
  • Step 2: Determine how many moles of NaOH you want to prepare. In this case, it is 0.5 moles.
  • Step 3: Multiply the number of moles (0.5) by the molar mass (40 g/mol).
  • Step 4: Calculate 0.5 x 40 g = 20 g.
  • Step 5: Conclude that you need 20 grams of NaOH to prepare 0.5 moles of NaOH solution.
  • Molar Mass Calculation – Understanding how to calculate the mass of a substance using its molar mass and the number of moles.
  • Stoichiometry – Applying stoichiometric principles to convert moles to grams.
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