How many grams of strontium (sr, 87.62 g/mol) are in 2.92 moles of strontium?

Answer :The correct answer for mass of Sr is 255.85 g.

Mole :

It can defined as the amount of substance that contains as many entities as present 12 g of Carbon-12 .

In 1 mole of any atom , molecule or ions is equal to its atomic mass , molecular mass or ionic mass respectively .

Mass , molar mass ( or atomic mass or ionic mass ) and mole can be related as :

Given :

Molar mass of Strontium = 87.62

Mole of Strontium = 2.92 mol

Plugging these values in Mole formula :

Multiplying both side by 87.62

Mass of Sr = 255.85 g

they are all solids.