某无土栽培用的营养液,要求KCl、K2SO4和NH4Cl三种固体原料的物质的量之比为1∶4∶8。若配制该营养液,取428 g NH4Cl,则需KCl和K2SO4的质量分别为( )
A.53.5 g和214 g | B.74.5 g和348 g |
C.74.5 g和696 g | D.149 g和696 g |
某无土栽培用的营养液,要求KCl、K2SO4和NH4Cl三种固体原料的物质的量之比为1∶4∶8。若配制该营养液,取428 g NH4Cl,则需KCl和K2SO4的质量分别为( )
A.53.5 g和214 g | B.74.5 g和348 g |
C.74.5 g和696 g | D.149 g和696 g |