Sure, let's break down the solution step-by-step:
1. Identify the mass of the magnesium (Mg) strip:
- The mass of the Mg strip is given as 5.86 grams.
2. Determine the molar mass of magnesium:
- The molar mass (or atomic weight) of magnesium (Mg) is 24.305 grams per mole (g/mol). This is a constant value known from the periodic table.
3. Calculate the number of moles of Mg:
- To find the number of moles, you can use the formula:
[tex]\[
\text{Number of moles} = \frac{\text{Mass}}{\text{Molar Mass}}
\][/tex]
- Substitute the given values into the formula:
[tex]\[
\text{Number of moles} = \frac{5.86 \text{ g}}{24.305 \text{ g/mol}}
\][/tex]
4. Perform the division:
- When you divide 5.86 grams by 24.305 grams per mole, you get:
[tex]\[
\text{Number of moles} = 0.24110265377494344
\][/tex]
So, Sally's strip of magnesium, which has a mass of 5.86 grams, contains approximately 0.2411 moles of magnesium (Mg).
