Question

（2006?天河區(qū)一模）生理鹽水是溶質(zhì)質(zhì)量分?jǐn)?shù)為0.9%的氯化鈉溶液，現(xiàn)用500g生理鹽水給某病人輸液，進(jìn)入病人體內(nèi)的氯化鈉質(zhì)量是（　�。�

A．0.45g

B．4.5g

C．9g

D．45g

Answer 1

分析：根據(jù)溶液的溶質(zhì)質(zhì)量分?jǐn)?shù)，計(jì)算一定量溶液中所含有溶質(zhì)的質(zhì)量．

解答：解：500g生理鹽水中含氯化鈉的質(zhì)量=500g×0.9%=4.5g
故選B

點(diǎn)評(píng)：本題為根據(jù)溶液的溶質(zhì)質(zhì)量分?jǐn)?shù)計(jì)算的最基礎(chǔ)的計(jì)算，直接利用“溶質(zhì)質(zhì)量=溶液質(zhì)量×質(zhì)量分?jǐn)?shù)”解決．