In one mole of Sr(HCO3)2, how many moles of each element are present?

• A. 1 mole Sr, 1 mole H, 2 moles C, 6 moles O
• B. 2 moles Sr, 2 moles H, 2 moles C, 6 moles O
• C. 1 mole Sr, 2 moles H, 1 mole C, 6 moles O
• D. 1 mole Sr, 2 moles H, 2 moles C, 6 moles O

Answer: (D)

Verified step by step guidance

1. Identify the chemical formula given: Sr(HCO3)2. This means one formula unit contains 1 Sr atom and 2 HCO3 groups.
2. Determine the number of atoms of each element in one HCO3 group: H = 1, C = 1, O = 3.
3. Multiply the number of atoms in one HCO3 group by 2 (since there are 2 HCO3 groups): H = 2, C = 2, O = 6.
4. Count the Sr atoms, which is 1 per formula unit.
5. Summarize the total moles of each element in 1 mole of Sr(HCO3)2: Sr = 1 mole, H = 2 moles, C = 2 moles, O = 6 moles.