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Travka [436]
3 years ago
15

Which of these is an indication that a chemical reaction has occurred? (boiling of a substance ,freezing of a substance, formati

on of a gas, melting of a substance)
Chemistry
2 answers:
Readme [11.4K]3 years ago
8 0

Answer:

Boiling of a substance

Explanation:

When something is boiled, heat is released to the surrounding, making it an exothermic reaction (a type of chemical reaction)

Anna007 [38]3 years ago
5 0

Answer: the answer is formation of gas

Explanation: i took the qwiz and boliing water is wrong

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what is the balanced chemical equation when solid calcium oxide and carbon dioxide gas are formed by the decomposition of solid
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The density of piece of wood will remain the same regardless of its temperature true or false
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4 years ago
First Name * hey can some one help
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1.VOLUME– The amount of space an object takes up. Basic Unit (SI Unit) for Solids – Cubic Meter, m3. LENGTH/DISTANCE – The measurement between two points.

2.one particle per cubic meter.

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5.In gases the particles are much further apart than in solids or liquids.

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3 0
3 years ago
H2(g) + CO2(g) + 10 kcal H2O(g) + CO(g)
EleoNora [17]

<u>Answer:</u> The equilibrium constant for the given reaction is 0.8

<u>Explanation:</u>

Equilibrium constant is defined as the ratio of concentration of the products raised to the power its stoichiometric coefficients to the concentration of reactants raised to power its stoichiometric coefficient. It is represented as K_c

For the general equation:

aA+bB\rightleftharpoons cC+dD

The equilibrium constant is represented as:

K_c=\frac{[C]^c[D]^d}{[A]^a[B]^b}

For the given chemical equation:

H_2(g)+CO_2(g)+10 kcal\rightleftharpoons H_2O(g)+CO(g)

K_c for this equation is given by:

K_c=\frac{[H_2O][CO]}{[H_2][CO_2]}

Concentration at equilibrium of

H_2=2mol/L\\H_2O=4mol/L\\CO_2=5mol/L\\CO=4mol/L

Putting values in above equation, we get:

K_c=\frac{4\times 4}{2\times 5}\\K_c=0.8

Hence, the equilibrium constant for the given chemical reaction is 0.8

6 0
3 years ago
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