Question

Please i need sum help in balancing these equations:
1)Phos(p)+Bromine(Br)=phostribromide(PBr)
2)Cacl2+NAHCO3+H2O=Nacl=Ca(OH)2+H2Co3

Thank You

Answer 1

Do you mean phorphorus tribromide?
2P + 3Br2 --> 2PBr3
Your teacher may prefer it be written as
P4 + 6Br2 ==> 4PBr3

I don't think the #2 reaction will go. Ca(HCO3)2 is soluble and there is no other driving force.