1 A silicon chip used in an IC of microcomputer has a mass o

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1 A silicon chip used in an IC of microcomputer has a mass of 5.68 mg.How many silicon (Si) atoms are present in the chip?2 Calcium carbonate (CaCO3),also called calcite,is the principal mineral found in limestone,marble,chalk,and pearls.(a) Calculate the molar mass of calcium carbonate.(b) A certain sample of CaCO3 contains 4.86moles.What is the mass in grams of this sample?What is the mass of the CO32- ions present?3 Determine the empirical and molecular formulas for a compound that gives the following percentages on analysis in mass percentage.The molar mass is known to be 98.96 g/mol.71.65% of Cl,24.27% of C,and 4.07% of H
1a。是说碳酸盐里钙多少模（molar）
是说现在有4.8模的碳酸盐CaCO3的样本这个样本里有多少克碳酸盐还有CO32-的的分子质量数
71.65% Cl,\x0924.27of C,and 4.07%的H这些判断有什么化合物已知98.96 g/mol这个单位
电脑中硅芯片共计5.68 mg 求硅芯片中硅原子的数量
大致稍微翻译了下。

1 [5.68/(28.0855*1000)]*6.02*10^23=0.00121748*10^23
2 a 100g/mol（是求碳酸钙摩尔质量.翻译出错）
b 486g 291.6g
3 C2H4Cl2

1 A silicon chip used in an IC of microcomputer has a mass o 英语翻译In general terms a single-chip microcomputer is characte A highly volatile substance initially has a mass of 1200g an a chip of gold An atom with a mass number of 196 has 40 fewer protons than At no time in history has there been such a mass migration o if a proton has a relative mass of 1 unit and a relative cha a mass of ） a mass of是什么意思英语翻译Two wires are anchored at both ends.Wire 1 has a mass of Consider a free particle of mass m in one dimension. a mass of 怎么用