10-sinf olimpiada javoblari

10-sinflar uchun kimyo fanidan olimpiada test javoblari 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 a a d d d c d d c d d a a c d c d 18. 2 xil . karbonatlar,gidrokarbonatlar 19. katodda natriy, anodda xlor 20. 27 g(al)________ 6.02*1023 13.5 __________ x=3.01*1023 21.56 g(fe)________ 64 g(cu) 2.8 _________ x=3.2 22. aluminiy 23.fes2 24. 1 mol (fe3o4)________ 168 g (fe) 0.5 mol __________ x= 84 g 25 modda konsentratsiyasining vaqtga nisbati kimyo fanidan 10-sinflar uchun yozma ish savollarining javoblari 1.caco3______ cao+co2 100(caco3 )________ 56(cao) 60__________ 100% 57.1=x _________ 32 57.1 _________ x=95.2% javob 95.2 % 2.cuso4+fe=feso4+cu 56 64 64-56=8 22-20=2 8 _______ 56(fe) 2 _______ …

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