MOLE CONCEPT , CONCENTRATIONS AND STOICHIOMETRY ASSIGNMENT# 2

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1.	How many moles of magnesium phosphate, Mg3(PO4)2 will contain 0.25 mole of oxygen atoms–
2.	2Calculate the weight of iron which will be converted into its oxide by the action of 18g of steam. --->                        3Fe     +    4H2O                   Fe3O4            +      4H2
3.	Calculate the weight of lime (CaO) obtained by heating 200kg of 90% pure limestone (CaCO3)
4.	Oxygen is prepared by catalytic decomposition of potassium chlorate (KClO3). DecompositioN of KClO3 gives potassium chloride (KCl) and oxygen (O2). If 4.2 mole of oxygen is needed for an experiment, how many grams of KClO3 must be decomposed. 2KClO3    -->   2KCl +3O2
5.	A gaseous alkane is exploded with oxygen. The volume of O2 for complete combustion to CO2 formed is in the ratio of 7 : 4. Deduce molecular formula of alkane.
6.	If 0.5 mole of BaCl2 is mixed with 0.2 mole of Na3PO4 the maximum amount of Ba3(PO4)2 that can be

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BY:-  MUKESH SHARMA

DPS JODHPUR