Chemistry · Atoms and Molecules
Which calculation correctly determines the formula unit mass of CaCl2?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Atomic mass of Ca + (2 × atomic mass of Cl) = 40 + 71 = 111 u✓
- 2Atomic mass of Ca × atomic mass of Cl = 40 × 35.5 = 1420 u
- 3Atomic mass of Ca + atomic mass of Cl = 40 + 35.5 = 75.5 u
- 4Atomic mass of Ca + (atomic mass of Cl ÷ 2) = 40 + 17.75 = 57.75 u
Correct answer
Atomic mass of Ca + (2 × atomic mass of Cl) = 40 + 71 = 111 u
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