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c=1000ρω/M 推到如下 由 c=n/V① 由密度換算1*10^3kg/L=1g/mL 於是m=1000ρV其中溶質為 m'=1000ρVω② 又由物質的量 n=m/M③ 聯立①②③ 解得 c=1000ρω/M
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