4,標準狀況下,2摩爾SO2氣體的體積約為 多少 V=nVm=2mol*22.4L/mol=44.8L5．生理鹽水的濃度為9克/升,要配制2000ml的生理鹽水,需要NaCl 多少克?需要NaCl的質量=2L*9g/L=18g6．某元素的原子3115X,它所含質子數(shù)為多少?電...1??1???H2SO4????H????????????2??1???H2CO3????H????????????14??1.5mol H2 ?к??? mol H????H2??????????? g/mol.15??18????????????????????????H2O?????1??1???H2SO4?? 2NA ??H????NA????????2??1???H2CO3??2NA??H????3NA????????14??1.5mol H2 ?к??? 3mol H????H2??????????? 2g/mol.15??18?????????????? 1 ???????? 6.02*10^23 ??H2O????