[tex]Mr(NH_{4} NO_{3})=14+1*4+14+16*3=80\\\\\\Mr(NaHCO_{3} )=23+1+12+16*3=84\\\\\\Mr(H_{2}O_{2} )=1*2+16*2=34\\\\\\Mr(FeS_{2} )=55+32*2=119\\\\\\Mr(NH_{3})=14+1*3=17\\ \\\\Mr(C_{2}H_{2} )=12*2+1*2=26\\\\\\Mr(CaC_{2} )=40+12*2=64\\\\\\Mr(Fe_{3} O_{4} )=55*3+16*4=229\\\\\\Mr(KClO_{3} )=40+35,5+16*3=123,5\\[/tex]
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[tex]Mr(NH_{4} NO_{3})=14+1*4+14+16*3=80\\\\\\Mr(NaHCO_{3} )=23+1+12+16*3=84\\\\\\Mr(H_{2}O_{2} )=1*2+16*2=34\\\\\\Mr(FeS_{2} )=55+32*2=119\\\\\\Mr(NH_{3})=14+1*3=17\\ \\\\Mr(C_{2}H_{2} )=12*2+1*2=26\\\\\\Mr(CaC_{2} )=40+12*2=64\\\\\\Mr(Fe_{3} O_{4} )=55*3+16*4=229\\\\\\Mr(KClO_{3} )=40+35,5+16*3=123,5\\[/tex]
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