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Calculate the percentage of pure aluminium in 10kg. Calculate the number of molecules of water of crystallisation Le. Its vapour density is Find its empirical and molecular formula. Four g of a metallic chloride contains 1. Calculate the empirical formula of the metallic chloride. Calculate the molecular formula of a compound whose empirical formula is CH2O and vapour density is Answer: Question 4. A compound has the following percentage composition.
If the molecular weight of the compound is and its original weight on analysis gave the above results 1. Its relative molecular mass is g. Calculate its molecular formula assuming that all the hydrogen in the compound is present in combination with oxygen as water of crystallization.
A hydrocarbon contains Determine its empirical formula if the compound contains 12 atoms of carbon. Calculate the empirical formula of the salt. A gaseous hydrocarbon weights 0. Find the molecular formula of the compound if its molecular weight is What mass of silver chloride will be obtained by adding an excess of hydrochloric acid to a solution of 0. What volume of oxygen at s.
Calculate the mass of copper needed to react with 63 g of nitric acid the volume of nitric oxide collected at the same time. Calculate : a The number of moles of sulphur dioxide liberated by g of ZnS and b The weight of ZnS required to produce Ammonia reacts with sulphuric acid to give the fertilizer ammonium sulphate. Calculate the volume of ammonia [at s. Heat on lead nitrate gives yellow lead [II] oxide, nitrogen dioxide and oxygen.
Answer: Calculate the weight of ammonia gas. Answer: Question 9. Sodium carbonate reacts with dil. Calculate the mass of pure salt formed when g. Answer: Question Sulphur burns in oxygen to give sulphur dioxide. If 16 g. Sample of impure magnesium is reacted with dilute sulphuric acid to give the respective salt and hydrogen.
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Dalal ICSE Chemistry Series : Objective Workbook For Simplified ICSE Chemistry for Class 9 (Edition
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