Lithium has one available electron in the outer (valence) shell (2s¹).
1s² 2s¹
Answer:
4.55 mol of C₂H₂
Explanation:
Let's verify the reaction:
CaC₂ + 2H₂O → C₂H₂ + Ca(OH)₂
Ratio is 1:1, so 1 mol of calcium carbide will produce 1 mol of acetylene.
4.55 mol of CaC₂ will make the same amount of C₂H₂
i need to see the frequencies.
Answer:
KNO₃ → 1 mol of K⁺ ; 1 mol of nitrate (1 mol of oxygen + 3 mol of nitrogen)
Na₂SO₄ → 2 mol of Na⁺ ; 1 mol of sulfate ( 1 mol of sulfur + 4 mol of oxygen)
Ca(OH)₂ → 1 mol of calcium; 2 moles of hydroxide
(NH₄)₂SO₃ → 2 mol of ammonium; 2 mol of sulfite (1 mol of sulfur + 3 mol of oxygen)
Ca₃(PO₄)₂ → 3 mol of calcium: 2 mol of phosphate (1 mol of phosphorus + 4 mol of oxygen)
Al₂(CrO₄)₃ → 2 mol of aluminum ; 3 mol of cromate (1 mol of Cr + 4 mol of oxygen)
Explanation:
Let's verify all the dissociations:
KNO₃ → K⁺ + NO₃⁻
Na₂SO₄ → 2Na⁺ + SO₄⁻²
Ca(OH)₂ → Ca²⁺ + 2OH⁻
(NH₄)₂SO₃ → 2NH₄⁺ + 2SO₃⁻²
Ca₃(PO₄)₂ → 3Ca²⁺ + 2PO₄⁻³
Al₂(CrO₄)₃ → 2Al³⁺ + 3CrO₄⁻²