我怎么算的是5kg啊Both man and woman need 150 mg of iodine (碘) per day.If a brand of table salt contains 0.005% by mass of potassium iodate (KIO3),how much this salt contains the necessary daily amount of iodine for a person?A.0.05gB.0.5gC.5g
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![我怎么算的是5kg啊Both man and woman need 150 mg of iodine (碘) per day.If a brand of table salt contains 0.005% by mass of potassium iodate (KIO3),how much this salt contains the necessary daily amount of iodine for a person?A.0.05gB.0.5gC.5g](/uploads/image/z/11378578-58-8.jpg?t=%E6%88%91%E6%80%8E%E4%B9%88%E7%AE%97%E7%9A%84%E6%98%AF5kg%E5%95%8ABoth+man+and+woman+need+150+mg+of+iodine+%28%E7%A2%98%29+per+day.If+a+brand+of+table+salt+contains+0.005%25+by+mass+of+potassium+iodate+%28KIO3%29%2Chow+much+this+salt+contains+the+necessary+daily+amount+of+iodine+for+a+person%3FA.0.05gB.0.5gC.5g)
我怎么算的是5kg啊Both man and woman need 150 mg of iodine (碘) per day.If a brand of table salt contains 0.005% by mass of potassium iodate (KIO3),how much this salt contains the necessary daily amount of iodine for a person?A.0.05gB.0.5gC.5g
我怎么算的是5kg啊
Both man and woman need 150 mg of iodine (碘) per day.If a brand of table salt contains 0.005% by mass of potassium iodate (KIO3),how much this salt contains the necessary daily amount of iodine for a person?
A.0.05g
B.0.5g
C.5g
D.0.05kg
E.0.5kg
我怎么算的是5kg啊Both man and woman need 150 mg of iodine (碘) per day.If a brand of table salt contains 0.005% by mass of potassium iodate (KIO3),how much this salt contains the necessary daily amount of iodine for a person?A.0.05gB.0.5gC.5g
KIO3 - I
214 127
X 150mg
X=150/127 * 214 = 253 mg
253mg/ 0.005%= 5*10^6 mg = 5Kg
就是5KG,要不你的题目打错了
150mg=0.15g KIO3中I的质量分数127/(127+39+3*16) *100% =59.3458%
则所需KIO3=0.15/59.3458%
进而所需的盐=0.15/59.3458%/0.005%=5.055kg
囧
你题目有没有错啊?
数据有疑问