the mass of a magazine is 270g.A dictionary is 3 times as heavy as the magazine.what is the total mass of the magazine and the dictionary?

the mass of 与 a mass of 有啥区别? mass的用法the mass of 和 a mass of 有什么区别？ The elements of a compound occur in a fixed mass ratio.请问fixed mass ratio The club women gathered____clothes for people in the tsunami-hit countriesA a mass of B mass of C a large amount of D amount of 为什么选A The atomic mass of copper is 63.55 amu.There are onlytwo isotopes of copper,63Cu with a mass of 62.93 amu and65Cu with a mass of 64.93 amu.What is the percentageabundance of each of these two isotopes? a mass of =masses of吗? The mass of 0.02mol of a substance is 0.88g1.what is the molar mass of this substance?2.what is its chemical formula? ___rock had fallen from the cliff and now blocked the road.A.Masses of B.A great mass of C.A much mass D.A mass of 选哪个,为什么其他的不行.要区别!= =谢谢了 英文翻译as the mass of air rises 翻译 A great mass of rock had fallen from the cliff and now blocked the road. a mass of 的近义词和词性 a mass of是什么意思及用法 英语翻译He believed that the shape of hole itself could have much meaning as that of solid mass,and could even help create a sense of mass or volume.尤其是 solid mass 在 句子中的意思 a mixture of Caco3 and Baco3 is 42.8% Co3 by mass. find the mass percent of baCo3 in the mixture什么是is 42.8% Co3 by mass? 是说混合物有42.8%的重量是Co3么? a sample used for the shipping approval of products prior to shipment after mass production find the empirical formulae of a compound with composition 46.7% silicon and 53.3% oxygen by mass 英语翻译The gravity force of a space object depends on its mass. 英语翻译The New DianaI was born a blonde,I've always been a princessA queen of hearts,now a motherwhere is the replacement for the world's front cover?From one English Rose to anotherI want to be the new DianaLying on a yacht reading photo-magazi