How many atoms are present in 3.50 moles of calcium (Ca)?

• A. 3.50 × 10^{22} atoms
• B. 6.02 × 10^{23} atoms
• C. 1.05 × 10^{24} atoms
• D. 2.11 × 10^{24} atoms

Answer: (D)

Verified step by step guidance

1. Understand that the problem asks for the number of atoms in a given amount of moles of calcium (Ca).
2. Recall that 1 mole of any substance contains Avogadro's number of particles (atoms, molecules, etc.), which is \$6.02 \times 10^{23}$ particles per mole.
3. Set up the calculation by multiplying the number of moles of calcium by Avogadro's number to find the total number of atoms: \(\text{Number of atoms} = \text{moles} \times 6.02 \times 10^{23}\).
4. Substitute the given value of moles (3.50 moles) into the equation: \(\text{Number of atoms} = 3.50 \times 6.02 \times 10^{23}\).
5. Perform the multiplication to find the total number of atoms present in 3.50 moles of calcium.