Answer:
9.75564x10^21
Explanation:
Moles of MgBr2=Mass/Molar Mass
=1.50grams/184.113g/mol
=0.0081mol(because the grams cancel out)
2 x 0.0081mol= 0.0162mol
0.0162 x 6.022 x 10^23(because avogadro's #)= 9.75564x10^21
hope this helps!!
