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2025-02-18 14:37:44
a, CaC2O4 + 2KMnO4 + 2H2SO4 → CaSO4 + K2SO4+ 2MnSO4 + 2CO2↑ + 2H2O
b, Nồng độ ion calcium trong máu người đó là : nồng độ ion calcium = khối lượng ion calcium/thể tích máu × 100
= 2,00 × 10^(-5)g/1mL × 100
= 2,00 mg/100mL máu
2025-02-18 14:37:42
∆rH2980 = (–542,82 + 2(–167,16)) - (–795,0)
∆rH2980 = –542,83 + 334,32 + 795,0
∆rH2980 = –82,15KJ/mol
2025-02-18 14:37:39
a, 4Fe + 12HNO3 → 4fe(NO3)3 + 4NO +8H2O
b, 2KMnO4 + 10FeSO4 + 8H2SO4 → 5Fe2(SO4 )3 + 2MnSO4 + K2SO4 + 8H2O