Scrie ecuatiile reactiilor urmatoarelor transformari: HCl--> H2 ---------------------------------------------------------------------------- H2-->CH4 ---------------------------------------------------------------------------- H2 --> PH3 ---------------------------------------------------------------------------- H2 -->Cu---> CuO---> CuCO3---> CuO---> CuCl2 -------------------------------------------------------------

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Clasă: Education Materie: chimie

Scrie ecuatiile reactiilor urmatoarelor transformari:
HCl--> H2
----------------------------------------------------------------------------
H2-->CH4
----------------------------------------------------------------------------
H2 --> PH3
----------------------------------------------------------------------------
H2 -->Cu---> CuO---> CuCO3---> CuO---> CuCl2
----------------------------------------------------------------------------
CuO---> CuSO4---> Cu(OH)2---->CuO

Întrebare a fost pusă de: USER1523

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USER4948

Cel mai bun răspuns

(283)

H2 + Cl2=2HCl

2H2 + C =CH4

6H2 + P4=4PH3

H2 + Cu O=Cu +H2O

2Cu + O2=2CuO

Cu O +MgCO3= CuCO3 + Mg O

CuCO3=CuO + C02

CuO +2HCl=CuCl2 + H2O

CuO + H2SO4=CuSO4 + H2O

CuSO4 +2 NaOH =Na2SO4 + Cu(OH)2

Cu(OH)2 =CuO +H2O

Răspunsul a fost dat în data 2 September 2025

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!!!!!!!!!!!!HELP!!!!!!!!!!!!!!!
Why was the Earth-centered model of the universe discarded?

A)Most people thought the idea was wrong.
B)The evidence did not support the idea.
C)Another scientist came up with a different idea.
D) was a bad idea.

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Bonsoir,
Factoriser l'expression C = (7x-3)(x+2)-(49x²-9)
Tu vas commencer par factoriser (49x²-9= pour en déduire une factorisation de C