Question

You are given 200.3 grams of Ca(NO₃)₂. How many Ca⁺² ions do you have? Make sure when you work out the problem you put all your units on all your numbers - follow your units, placing your numbers and units where you need to in order to cancel the units you need to cancel and keep the units that you need to keep.

Answer 1

Calculahion of number of ca2t ions caCNo3)2 = 200.3 g. 164.10 we har, Given mass of molar mass of ca CNo3), one calcium Also, we Ko o imole of lon and too nitrate ions. ca CNO3)2 Contain Now first determine the number af moles f using number of moles df ca CNO3)2 ca 2+ ions 200.3 % 164.101mol 22 mols moles d ca CNog) =Given mass molar mas s meles f cacNO3), = 1-22 mols Cal culak the moles of ca 2 1ons in 1:22 mols df cacn ca 2+ jan 1 mul o 1 mol. f cacNas)2. 1-22 mols of ca CN03)2 mols of ca2 1ons = .22 mols. ca 2+ ions 1.22 mel of Ca 2+ jons Converi jnto umber 6.023x1023 ions i mol. ion Number d ca2+ 1ons 1-22 mol ca2+ ions 23 = 7.348 X10 jons. = 7.35X10 23i0ns FCa CNo3) contaun 7.3s X10 23 Ca 2t ioas 200-3