Each CaCO3 has 5 atoms (1 Ca, 1 C, 3 O). Number of atoms = moles x atoms per molecule x Avogadro's number = 2 moles x 5 x 6.022 x 10^23 = 1.206 x 10^24 atoms.
Questions & Step-by-step Solutions
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Q
Q: What is the number of atoms in 2 moles of CaCO3?
Solution: Each CaCO3 has 5 atoms (1 Ca, 1 C, 3 O). Number of atoms = moles x atoms per molecule x Avogadro's number = 2 moles x 5 x 6.022 x 10^23 = 1.206 x 10^24 atoms.
Steps: 8
Step 1: Identify the chemical formula of calcium carbonate, which is CaCO3.
Step 2: Count the number of atoms in one molecule of CaCO3. It has 1 calcium (Ca), 1 carbon (C), and 3 oxygen (O) atoms.
Step 3: Add the number of atoms together: 1 (Ca) + 1 (C) + 3 (O) = 5 atoms in total per molecule of CaCO3.
Step 4: Determine how many moles you have. In this case, you have 2 moles of CaCO3.
Step 5: Use Avogadro's number, which is approximately 6.022 x 10^23, to find out how many molecules are in 2 moles.
Step 6: Calculate the total number of atoms: Number of atoms = moles x atoms per molecule x Avogadro's number.
Step 7: Plug in the numbers: Number of atoms = 2 moles x 5 atoms/molecule x 6.022 x 10^23 molecules/mole.
Step 8: Perform the calculation: 2 x 5 x 6.022 x 10^23 = 1.206 x 10^24 atoms.
