How many grams are contained in 1 gram-atom of Na?

Options

A. 13 g
B. 23 g
C. 1 g
D. `1/23`g

Answer

To find out how many grams are contained in 1 gram-atom of sodium (Na), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the term "gram-atom":**
- A "gram-atom" refers to one mole of atoms. Therefore, 1 gram-atom of sodium (Na) is equivalent to 1 mole of sodium atoms.

2. **Finding the molar mass of sodium:**
- The molar mass of sodium (Na) is approximately 23 grams per mole. This means that 1 mole of sodium weighs 23 grams.

3. **Calculating the mass of 1 gram-atom of sodium:**
- Since 1 gram-atom of sodium is 1 mole of sodium, the mass of 1 gram-atom of sodium is simply the molar mass of sodium.
- Therefore, the mass of 1 gram-atom of sodium = 23 grams.

### Final Answer:
The mass contained in 1 gram-atom of Na is **23 grams**.

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