題目列表(包括答案和解析)
在無土栽培中需用濃度為0.5mol/LNH4Cl、0.16mol/LKCl、0.24mol/LK2SO4的培養(yǎng)液,若用KCl、NH4Cl和(NH4)2SO4三種物質來配制1.00L上述營養(yǎng)液,所需三種鹽的物質的量正確的是
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 |
在無土栽培中需用濃度為0.5mol/LNH4Cl、0.16mol/LKCl、0.24mol/LK2SO4的培養(yǎng)液,若用KCl、NH4Cl和(NH4)2SO4三種物質來配制1.00L上述營養(yǎng)液,所需三種鹽的物質的量正確的是
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
在無土栽培中需用濃度為0.5mol/LNH4Cl、0.16mol/LKCl、0.24mol/LK2SO4的培養(yǎng)液,若用KCl、NH4Cl和(NH4)2SO4三種物質來配制1.00L上述營養(yǎng)液,所需三種鹽的物質的量正確的是
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某氣體中含有的分子數(shù)為b,則cg該氣體在標準狀況下占有的體積應表示為(式中NA為阿伏加德羅常數(shù))_______________
(2)在標準狀況下,H2和O2的混合氣體共8.96L,質量為8.3g。則H2的質量為 ,O2的體積分數(shù)為________。
(3) 在無土栽培中需用濃度為0.5mol/LNH4Cl、0.16mol/LKCl、0.24mol/LK2SO4的培養(yǎng)液,若用KCl、NH4Cl和(NH4)2SO4三種物質來配制1.00L上述營養(yǎng)液,所需三種鹽的物質的量分別是
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