Question

ПОЖАЛУЙСТА!! РЕБЯТА,СРОЧНО НУЖНА ВАША ПОМОЩЬ!!!Помогите,очень прошу!1)Na-->Na2O-->NaCl-->Na2SO42)Zn-->ZnO-->Zn2(NO3)2-->ZnCl23)C-->CO2-->CO-->CaC-->cЗная валентности расставить индексы:CuS;AlPO4;FeNO3;CuBr;FeS;KBr;Ki(йод)MgO;CaSiO3

Answer 1

1) Na -> Na2O -> NaCl -> Na2SO4 - Sodium (Na) reacts with oxygen (O) to form sodium oxide (Na2O). - Sodium oxide (Na2O) reacts with hydrochloric acid (HCl) to form sodium chloride (NaCl). - Sodium chloride (NaCl) reacts with sulfuric acid (H2SO4) to form sodium sulfate (Na2SO4).

2) Zn -> ZnO -> Zn(NO3)2 -> ZnCl2 - Zinc (Zn) reacts with oxygen (O) to form zinc oxide (ZnO). - Zinc oxide (ZnO) reacts with nitric acid (HNO3) to form zinc nitrate (Zn(NO3)2). - Zinc nitrate (Zn(NO3)2) reacts with hydrochloric acid (HCl) to form zinc chloride (ZnCl2).

3) C -> CO2 -> CO -> CaC -> C - Carbon (C) reacts with oxygen (O) to form carbon dioxide (CO2). - Carbon dioxide (CO2) can be reduced to carbon monoxide (CO) under certain conditions. - Carbon monoxide (CO) reacts with calcium oxide (CaO) to form calcium carbide (CaC). - Calcium carbide (CaC) can decompose to form carbon (C) and calcium oxide (CaO).

Now, let's assign the valencies and write the formulas for the given compounds:

- CuS: Copper (Cu) has a valency of +2, and sulfur (S) has a valency of -2. Therefore, the formula for copper(II) sulfide is CuS.

- AlPO4: Aluminum (Al) has a valency of +3, and phosphate (PO4) has a valency of -3. Therefore, the formula for aluminum phosphate is AlPO4.

- FeNO3: Iron (Fe) has multiple valencies, but in this case, it is likely to have a valency of +3. Nitrate (NO3) has a valency of -1. Therefore, the formula for iron(III) nitrate is Fe(NO3)3.

- CuBr: Copper (Cu) has a valency of +2, and bromine (Br) has a valency of -1. Therefore, the formula for copper(II) bromide is CuBr2.

- FeS: Iron (Fe) has