Question

question 1

how many moles of \\(\text{cu}\\) are in \\(1.48 \times 10^{25}\\) \\(\text{cu}\\) atoms?

\\(\bigcirc\\) \\(1.54 \times 10^{25}\\)
\\(\bigcirc\\) \\(6.022 \times 10^{23}\\)
\\(\bigcirc\\) \\(24.6\\)
\\(\bigcirc\\) \\(0.0408\\)
\\(\bigcirc\\) none of these

Explanation:

⚡ Using what you learned: mole-to-mass and mole-to-particle conversions

Step 1: Identify the conversion factor

$$ 1\text{ mole} = 6.022 \times 10^{23}\text{ atoms} $$

Step 2: Set up the calculation

$$ \text{Moles of Cu} = \frac{1.48 \times 10^{25}\text{ atoms}}{6.022 \times 10^{23}\text{ atoms/mol}} $$

Step 3: Calculate the value

$$ \text{Moles of Cu} \approx 24.576\text{ mol} \approx 24.6\text{ mol} $$

Answer:

24.6