oblicz masy cząsteczkowe podanych substancji a)cl 2 ,p4 ,KBr, h2s ,nh3,na2so4,(nh4)2,co 3, b) mg3,(po4)2mgo,naF,cao,h2so4

a) mCl2=2*35,5u=71u mP4=4*31u=124u mKBr=39u+80u=119u H2S=2*1u+32u=34u NH3=14u+3*1u=17u mNa2SO4=2*23u+32u+4*16u=142u m(NH4)2CO3=2*14u+8*1u+12u+3*16u=96u b) mMg3(PO4)2=3*24u+2*31u+8*16u=262u mMgO=24u+16u=40u mNaF=23u+19u=42u mCaO=40u+16u=56u mH2SO4=2*1u+32u+4*16u=98u

Cl2= 2*35,5 = 71 u P4 = 31 * 4 = 124 u KBr = 39 + 80 = 119 u H2S = 2*1 + 32 = 34 u NH3 = 14 +3 * 1 = 17 u  Na2SO4 = 23*2 +32 + 4*16= 142 u (NH4)2 = 2(14 + 4) =  36 u Co3 = 12 + 16*3 = 60 u  Mg3 = 24*3 = 72 (PO4)2 = 2 * (31 + 16*4) = 190 u  MgO = 24 + 16 = 40 u  NaF= 23 + 19 = 42 u CaO = 40 + 16 = 56 u H2SO4 = 2*1 + 32 + 16*4 = 98 u