How many atoms are present in 3 moles of chromium (Cr)?

• A. 3.00 \times 10^{24} atoms
• B. 9.03 \times 10^{23} atoms
• C. 6.02 \times 10^{23} atoms
• D. 1.81 \times 10^{24} atoms

Answer: (D)

Verified step by step guidance

1. Recall that one mole of any substance contains Avogadro's number of particles (atoms, molecules, etc.), which is \$6.02 \times 10^{23}$ particles per mole.
2. Identify the quantity given: 3 moles of chromium (Cr). We want to find the total number of atoms in these 3 moles.
3. Use the relationship: Number of atoms = (number of moles) \(\times\) (Avogadro's number). Mathematically, this is \(\text{atoms} = 3 \times 6.02 \times 10^{23}\).
4. Multiply the numerical values and keep track of the powers of ten carefully to find the total number of atoms.
5. Express the final answer in scientific notation to match the format of the given options.