A slice of Swiss cheese contains 43.0 mg of sodium. Be sure each of your answer entries has the correct number of significant figures. Note: Reference the Conversion factors for non-SI units and SI prefixes tables for additional information. Part 1 of 3 What is the mass of the sodium in grams? Part 2 of 3 What is the mass of the sodium in ounces? Part 3 of 3 What is the mass of the sodium in pounds?

Let's solve each part step by step.

### Part 1: Mass of Sodium in Grams
We are given:
- 43.0 mg of sodium

To convert milligrams (mg) to grams (g):
\[
1 \, \text{mg} = 0.001 \, \text{g}
\]
\[
\text{Mass in grams} = 43.0 \, \text{mg} \times 0.001 \, \text{g/mg} = 0.0430 \, \text{g}
\]
Thus, the mass of sodium is **0.0430 g** (with 4 significant figures to match the input).

### Part 2: Mass of Sodium in Ounces
We are given:
- 43.0 mg of sodium

First, we convert 43.0 mg to grams, which is **0.0430 g** (as calculated above).

Now, to convert grams to ounces:
\[
1 \, \text{ounce} = 28.3495 \, \text{g}
\]
\[
\text{Mass in ounces} = \frac{0.0430 \, \text{g}}{28.3495 \, \text{g/oz}} = 0.001516 \, \text{oz}
\]
Thus, the mass of sodium is approximately **0.00152 oz** (with 3 significant figures).

### Part 3: Mass of Sodium in Pounds
We are given:
- 43.0 mg of sodium

To convert grams to pounds:
\[
1 \, \text{pound} = 453.592 \, \text{g}
\]
\[
\text{Mass in pounds} = \frac{0.0430 \, \text{g}}{453.592 \, \text{g/lb}} = 9.48 \times 10^{-5} \, \text{lb}
\]
Thus, the mass of sodium is approximately **9.48 × 10⁻⁵ lb** (with 3 significant figures).

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Let me know if you'd like more details or further explanations! Here are five related questions:

1. How would you convert 0.0430 grams of sodium into micrograms (µg)?
2. What is the mass of sodium in kilograms?
3. How many milligrams are in one ounce of sodium?
4. How would you calculate the sodium mass in milligrams for a larger slice with 129 mg of sodium?
5. What is the importance of significant figures in scientific calculations?

**Tip**: Always ensure that your final answer reflects the same number of significant figures as your original data to maintain precision in calculations.

Solve a problem involving converting 43.0 mg of sodium into grams, ounces, and pounds with detailed calculations. This problem covers essential concepts of unit conversion and significant figures, suitable for students in Grades 9-12.

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