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What is the number of moles in 10 grams of Na?

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Question: What is the number of moles in 10 grams of Na?

Options:

  1. 0.43
  2. 0.22
  3. 0.5
  4. 0.1

Correct Answer: 0.43

Solution: 

Molar mass of Na = 23 g/mol. Number of moles = mass / molar mass = 10 g / 23 g/mol = 0.43 moles.

What is the number of moles in 10 grams of Na?

Practice Questions

Q1
What is the number of moles in 10 grams of Na?
  1. 0.43
  2. 0.22
  3. 0.5
  4. 0.1

Questions & Step-by-Step Solutions

What is the number of moles in 10 grams of Na?
  • Step 1: Identify the substance. In this case, we are working with sodium (Na).
  • Step 2: Find the molar mass of sodium (Na). The molar mass is 23 grams per mole (g/mol).
  • Step 3: Write down the mass you have. Here, the mass is 10 grams.
  • Step 4: Use the formula to calculate the number of moles. The formula is: Number of moles = mass / molar mass.
  • Step 5: Plug in the values into the formula: Number of moles = 10 g / 23 g/mol.
  • Step 6: Perform the division: 10 divided by 23 equals approximately 0.43.
  • Step 7: Conclude that there are about 0.43 moles of sodium in 10 grams.
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