Question

Calculate the molar mass of calcium nitrate.

Calculate the molar mass of calcium nitrate.

164.10 g/mol

132.10 g/mol

102.09 g/mol

136.03 g/mol

none of the above

I typically understand how to calculate the molar mass but not when it is a compound. I originally got 102.09 but it was marked wrong on my homework and I do not know how to get to the correct answer.

Answer 1

For finding of Molar mass of any compound, we must have some idea of atomic weigt of element that forms it.You must memorise Atomic weight of some common elements.(eg. carbon, Nitrogen,Oxygen,Sodium,Magnesium,calcium,Chlorine,Iodine ,bromine etc).

solution :- 1 molar mass is mass in grams of one mole of a substances. It can be determined by sum of total mass. (in grams) of all the atoms that make it Calcium Matrate in formula s Ca(NO3). To determine molar mass , lne must know atomic mass of each element in CalNos), Atomic mass of calcium = 40.08 almol Atomic mass of Nitrogen = 14.01 glmol Atomic mass of onggen - 16.00 g/mole moler mass of Ca(NO3)2 = 40.08 + [4:01+ 3x 16:9 x2 = 40.08 +[14:01+ 49.00] x2 = 40108 + 124.02=164.19/mol . molar mass of Calcium Nitrate s 164.1 g/mola

Please give me better rattings.

Thank you.