(1)9.03×1023个CO2的物质的量是___________,质量是__________g。0.2 molNH4+所

(1)9.03×1023CO2的物质的量是___________,质量是__________g0.2 molNH4+所含电子的数目为___________

   (2)标准状况下,3.4 g NH3的体积为____________,在相同温度下,它与同体积的0.1 mol HCl气体的压强之比为____________

   (3)质量分数为98%、密度为1.84 g/cm3的浓硫酸中H2SO4的物质的量浓度为______________

   (4)100 mL Al2(SO4)3溶液,已知Al3+的质量为2.7 g,则Al2(SO4)3物质的量浓度是___________

   Al3+的物质的量浓度为c mol/L,则SO42-的物质的量浓度为_______________

答案

(1)1.5 mol     66    2NA1.204×1024

(2)4.48 L      21

(3)18.4 mol/L

(4)0.5 mol/L   1.5c mol/L

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