1. How many moles of NaOH (FW = 40g/mol) are there in 2.0 grams NaOH? 2. How many grams of Na2CO3 (FW=106g/mo10 are there in 0.50 moles Na2CO3? 3. How much does 6.02 x 1023 molecules of CO2 (FW = 44g/mol) weigh? 4. Calculate the formula weight of aluminum phosphate. 5. What is the percentage composition of the elements present in sodium carbonate? 6. Determine the empirical formula of the compound containing 87.5% nitrogen and 12.5% H by mass. 7. What is the molecular formula of the compound if its empirical formula is HCO2 and its molecular weight is 90.0 almu?

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.