盐为60×25%=15g
所以稀释后的盐水为150g
所以需加水90g
浓度为25%的盐水60克,稀释后浓度为10%的盐水,需加水多少克?
浓度为25%的盐水60克,稀释后浓度为10%的盐水,需加水多少克?
数学人气:585 ℃时间:2019-11-01 11:38:41
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