题目
并不是翻译题 所以不需要给我翻译出来～
1)One of the first mixtures of metals,called amalgams,used by dentists for tooth fillings consisted of 26.0gof silver,10.8g of tin,2.4g of copper,and 0.8g of zinc.How much silver is in a 25.0g sample of this amalgam?
2)there are 7.0 x 10^6red blood cells(RBC) IN 1.0mm^3 of blood.How many red blood cells are in 1.0L of blood?
3)Gold has a density of 19.3g /cm^3.what is the density in kilograms per cubic meter?
1)One of the first mixtures of metals,called amalgams,used by dentists for tooth fillings consisted of 26.0gof silver,10.8g of tin,2.4g of copper,and 0.8g of zinc.How much silver is in a 25.0g sample of this amalgam?
2)there are 7.0 x 10^6red blood cells(RBC) IN 1.0mm^3 of blood.How many red blood cells are in 1.0L of blood?
3)Gold has a density of 19.3g /cm^3.what is the density in kilograms per cubic meter?
提问时间：2020-12-29
答案
1 26/（26+10.8+2.4+0.8=15）*25=16.25克
2 7*10^6*1000000=7.0*10^12
3 19.3*1000000/1000=19300KG/M^3
2 7*10^6*1000000=7.0*10^12
3 19.3*1000000/1000=19300KG/M^3
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