体积为V mL,密度为d g/cm3的溶液,含有相对分子质量为M的溶质m g,其

体积为V mL,密度为d g/cm3的溶液,含有相对分子质量为M的溶质m g,其物质的量浓度为c mol/L,质量分数为ω%,下列表达式中正确的是(   )  

A    B    C   D

答案

D

相关题目

The thing that       is not whether you fail or not, but whether you try o
The thing that       is not whether you fail or not, but whether you try or not. A. matters               B. cares C. considers             D. minds
每个人的生命价值大小不同,这是因为个人成就大小的不同
每个人的生命价值大小不同,这是因为个人成就大小的不同。 
下列变化不可能通过一步实验直接完成的是(    )A.Al(OH)3→
下列变化不可能通过一步实验直接完成的是(    )A.Al(OH)3→ Al2O3        B.Al2O3→ Al(OH)3C.Al →AlO2-             D.Al3+ →Al(OH)3 
    On a Friday night in New York,a poor young man called Jay stood near th
    On a Friday night in New York,a poor young man called Jay stood near the subway station,playing this violin.The music was so great that many people slowed down and put some money into his
Having too much food is not good for us,____having more exercise does good to us
Having too much food is not good for us,____having more exercise does good to us.  A.while   B.and   C.but    D.so  
下列关于微观粒子的说法,正确的是(    ) A.所有的原子都
下列关于微观粒子的说法,正确的是(    ) A.所有的原子都可以构成分子                     B.带电的粒子一定是离子 C.并不是所有分子
方程x2+y2-2(t+3)x+2(1-4t2)y+16t4+9=0(t∈R)表示圆方程,则t的取值范围
方程x2+y2-2(t+3)x+2(1-4t2)y+16t4+9=0(t∈R)表示圆方程,则t的取值范围是(    )A.-1<t<         B.-1<t<          C.-<t<1          D.1<t<2
下列反应在细胞溶胶和线粒体内均能完成的是()      A
下列反应在细胞溶胶和线粒体内均能完成的是()      A.葡萄糖→丙酮酸    B.  丙酮酸→酒精+CO2      C.ADP+Pi+能量→ATP      D. +O2→H2O

最新题目