题目
题型:荔湾区一模难度:来源:
A.35% | B.70% | C.60% | D.5% |
答案
14×2 |
14+4+14+16×3 |
故选A.
核心考点
举一反三
A.O.5g | B.1g | C.O.4g | D.O.16g |
A.Na2O | B.MgO | C.SO2 | D.CO2 |
A.C2H2 | B.C2H4 | C.C2H6 | D.CH4 |
(1)该试剂瓶中含硫酸的质量是______g;
(2)欲配制100g溶质质量分数为19.6%的稀硫酸,需要这种浓硫酸______g.
A.35% | B.70% | C.60% | D.5% |
14×2 |
14+4+14+16×3 |
A.O.5g | B.1g | C.O.4g | D.O.16g |
A.Na2O | B.MgO | C.SO2 | D.CO2 |
A.C2H2 | B.C2H4 | C.C2H6 | D.CH4 |