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3 years ago

Chemical Equations and Reactions WS

Chemistry

1 answer:

ruslelena [56]3 years ago

7 0

Answer:

1,1,1

decomposition reaction

Explanation:

The reaction equation is given as:

_Ca(OH)₂ → _CaO + _H₂O

This reaction is a decomposition reaction in which a single reactant breaks down to give two or more products.

To balance the equation, we assign variables a, b and c, then we use a mathematical approach to solve the problem;

aCa(OH)₂ → bCaO + cH₂O

Conserving Ca : a = b

O: 2a = b + c

H: 2a = 2c

let a = 1, b = 1 , c = 1

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3 years ago

Can anyone help with properties of non-metals?

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3 years ago

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Marina86 [1]

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Hope this helps!

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3 years ago

If element x forms the oxides xo and x2o3 the oxidation numbers of element x are

Deffense [45]

Answer:

b) +2 and +3.

Explanation:

Hello,

In this case, given the molecular formulas:

$XO$

And:

$X_2O_3$

We can relate the subscripts with the oxidation states by knowing that they are crossed when the compound is formed, for that reason, we notice that oxygen oxidation state should be -2 for both cases and the oxidation state of X in the first formula must be +2 since both X and O has one as their subscript as they were simplified:

$X^{+2}O^{-2}$

Moreover, for the second case the oxidation state of X should be +3 in order to obtain 3 as the subscript of oxygen:

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Thus, answer is b)+2 and +3

Best regards.

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3 years ago