Chemistry help?
回答 (1)
2016-05-10 2:21 pm
Molar mass of MgCl₂ = 24.3 + 35.5 = 59.8 g/mol
No. of moles of MgCl₂ = (5 g) / (59.8 g/mol) = 0.0836 mol
1 mole of MgCl₂ contains 6.022 × 10²³ formula units of MgCl₂.
Number of formula units of MgCl₂ = (6.022 × 10²³ /mol) × (0.0836 mol) = 5.03 × 10²²
1 formula unit of MgCl₂ contains 2 Cl⁻ ions.
Number of chloride ions = (5.03 × 10²²) × 2 = 1.01 × 10²³
No. of moles of MgCl₂ = (5 g) / (59.8 g/mol) = 0.0836 mol
1 mole of MgCl₂ contains 6.022 × 10²³ formula units of MgCl₂.
Number of formula units of MgCl₂ = (6.022 × 10²³ /mol) × (0.0836 mol) = 5.03 × 10²²
1 formula unit of MgCl₂ contains 2 Cl⁻ ions.
Number of chloride ions = (5.03 × 10²²) × 2 = 1.01 × 10²³
收錄日期: 2021-04-18 14:50:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160510034642AAHUkbo