Question

2.8 mol cu
express your answer using two significant figures.
n =
atoms

Explanation:

Step1: Recall the mole-atom conversion formula

The number of atoms \( N = n \times N_A \), where \( n = 2.8 \, \text{mol} \) and \( N_A = 6.022 \times 10^{23} \, \text{atoms/mol} \).

Step2: Calculate the number of atoms

\( N = 2.8 \times 6.022 \times 10^{23} \approx 1.68616 \times 10^{24} \)

Step3: Round to two significant figures

\( 1.68616 \times 10^{24} \approx 1.7 \times 10^{24} \)

Answer:

\(1.7 \times 10^{24}\)