作业帮 > 英语 > 作业

SAT2化学题A solid cube of iron whose edge is 4 inches weight 20

来源:学生作业帮 编辑:神马作文网作业帮 分类:英语作业 时间:2024/11/13 01:58:10
SAT2化学题
A solid cube of iron whose edge is 4 inches weight 20.8 lbs.What is the specific gravity of this sample of iron?Water weights 62.4 pounds percubic foot.
(A)4.5
(B)5.2
(C)9.0
(D)27
(E)324
实在是不懂这些单位如何换算,望高手给出详细解答过程,谢谢~
SAT2化学题A solid cube of iron whose edge is 4 inches weight 20
H2O:62.4lbs/ft^3
Fe:20.8lbs/(1/3ft)^3=561.6lbs/ft^3
(1 foot = 12 inches,1 inch =1/12 foot)
s.g.=561.6/62.4*1.00=9.0