How many atoms are present in a 112 g sample of #CaBr_2#?

1 Answer
Jan 3, 2018

Answer:

#~~0.56# moles or #~~3.37*10^23# atoms

Explanation:

Molar mass of #CaBr_2# is #199.886# amu

Moles = #"Mass"/"Molar Mass"#

In this case, mass = 112g, molar mass = 199.886

#:.# Moles of #CaBr_2# = #112/199.886~~0.56#

#1# mole = #6.02*10^23# atoms (Avogadro's number)

#:. 0.56# moles = #3.37*10^23# atoms