Answer to Question #164999 in Organic Chemistry for Siera

Question

A chemist adds 105.0mL of a 0.817mol/L sodium carbonate Na2CO3

 solution to a reaction flask. Calculate the mass in grams of sodium carbonate the chemist has added to the flask. Round your answer to 3 significant digits. please show steps thank you

Answer 1

Molarity= 0.817mol/L

Volume= 105.0ml= 0.105L

Molar mass= 106g/mol

Now,

Molarity= moles of solute/Litres of solution

Moles= Molarity x Litres of solution

= 0.817 x 0.105= 0.086mol

Recall that;

Mole = mass/molar mass

Mass= mole x molar mass

Mass= 0.086 x 106 = 9.12g