Chemistry, 15.01.2021 09:30 Beast3dgar
A)Completaţi ecuaţiile chimice următoare cu formulele chimice şi coeficienţii adecvaţi:
2Ca +O2...CaO
...CuCl2 +... CuSO4 + ... HCl
...KClO3... +...O2
...AgNO3 +... H2SO4... +...
...H2 +... N2 ...NH3 1 punct
b) numiți şi clasificaţi substanţele din primele 2 ecuaţii de mai sus.
Answers: 1
Chemistry, 22.06.2019 07:30
According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons
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Chemistry, 22.06.2019 10:10
Stage in which a typical star has completely stopped fusion
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Chemistry, 22.06.2019 13:30
1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6
Answers: 2
Chemistry, 22.06.2019 15:30
Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)
Answers: 3
A)Completaţi ecuaţiile chimice următoare cu formulele chimice şi coeficienţii adecvaţi:
2Ca +O2...C...
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