题目列表(包括答案和解析)
在无土栽培中需用浓度为0.5mol/LNH4Cl、0.16mol/LKCl、0.24mol/LK2SO4的培养液,若用KCl、NH4Cl和(NH4)2SO4三种物质来配制1.00L上述营养液,所需三种盐的物质的量正确的是
A.0.4mol、0.5mol、0.12mol B.0.66mol、0.5mol、0.24mol
C.0.64mol、0.5mol、0.24mol D.0.64mol、0.02mol、0.24mol
A.0.4mol、0.5mol、0.12mol | B.0.66mol、0.5mol、0.24mol |
C.0.64mol、0.5mol、0.24mol | D.0.64mol、0.02mol、0.24mol |
在无土栽培中需用浓度为0.5mol/LNH4Cl、0.16mol/LKCl、0.24mol/LK2SO4的培养液,若用KCl、NH4Cl和(NH4)2SO4三种物质来配制1.00L上述营养液,所需三种盐的物质的量正确的是
A.0.4mol、0.5mol、0.12mol B.0.66mol、0.5mol、0.24mol
C.0.64mol、0.5mol、0.24mol D.0.64mol、0.02mol、0.24mol
在无土栽培中需用浓度为0.5mol/LNH4Cl、0.16mol/LKCl、0.24mol/LK2SO4的培养液,若用KCl、NH4Cl和(NH4)2SO4三种物质来配制1.00L上述营养液,所需三种盐的物质的量正确的是
A.0.4mol、0.5mol、0.12mol | B.0.66mol、0.5mol、0.24mol |
C.0.64mol、0.5mol、0.24mol | D.0.64mol、0.02mol、0.24mol |
(1)如果ag某气体中含有的分子数为b,则cg该气体在标准状况下占有的体积应表示为(式中NA为阿伏加德罗常数)_______________
(2)在标准状况下,H2和O2的混合气体共8.96L,质量为8.3g。则H2的质量为 ,O2的体积分数为________。
(3) 在无土栽培中需用浓度为0.5mol/LNH4Cl、0.16mol/LKCl、0.24mol/LK2SO4的培养液,若用KCl、NH4Cl和(NH4)2SO4三种物质来配制1.00L上述营养液,所需三种盐的物质的量分别是
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com