问题
填空题
浓度为70%的酒精溶液500克与浓度为50%的酒精溶液300克,混合后所得到的酒精溶液的浓度是______.
答案
500×70%=350(克);
300×50%=150(克);
(350+150)÷(500+300),
=500÷800,
=62.5%;
答:混合后所得到的酒精溶液的浓度是62.5%.
故答案为:62.5%.
浓度为70%的酒精溶液500克与浓度为50%的酒精溶液300克,混合后所得到的酒精溶液的浓度是______.
500×70%=350(克);
300×50%=150(克);
(350+150)÷(500+300),
=500÷800,
=62.5%;
答:混合后所得到的酒精溶液的浓度是62.5%.
故答案为:62.5%.
根据短文,仿照例子,完成下列表格。 | ||||||||||||||||||||
I'm Chen Jie. I can make the bed and do the dishes. I can't wash the clothes or set the table. She's Amy. She can make the bed and wash the clothes. She can't do the dishes or set the table. He's Zhang Peng. He can wash the clothes and do the dishes. He can't make the bed or set the table.
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