LECTURE 4.3 – MOLAR MASS.

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Presentation transcript:

LECTURE 4.3 – MOLAR MASS

Today’s Learning Targets LT 3.7 – I can calculate the molar mass of given element or compound. LT 3.8 – Given an element, I can convert between the number of moles to grams and grams back to moles

What is molar mass?

I. Molar Mass Molar mass is the mass, in grams, of 1 mole of substance. The molar mass is the mass listed on the periodic table Units of Molar mass are g/mol Molar Mass

How do we calculate molar mass?

More Tables! = = = x x x Element Number of Atoms in Compound Molar Mass Total Element Molar Mass Total Molar Mass x = x = x =

Class Examples CaBr2 Ca3(PO4)2

Table Talk Calculate the molar mass for the following compounds: KCN Ca(NO3)2 Al2(SO4)3