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3 years ago

There is more energy after a chemical reaction than before the reaction. true or false

Chemistry

2 answers:

d1i1m1o1n [39]3 years ago

6 0

It stays the same because a Chemical reaction has nothing to do with energy so the answer would be. False

s2008m [1.1K]3 years ago

5 0

It depends on the kind of reaction.
In Endothermic reaction, energy is more before reaction than after reaction.

In Exothermic reaction, energy is less before reaction than after reaction.

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Can a molecular formula ever be the same as an empirical formula? Explain your answer.

Marina CMI [18]

Answer:

The molecular formula for a compound can be the same as or a multiple of the compound's empirical formula. Molecular formulas are compact and easy to communicate; however, they lack the information about bonding and atomic arrangement that is provided in a structural formula.

Explanation:

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3 years ago

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\The specific heat of aluminum is 0.21 cal g°C . How much heat is released when a 10 gram piece of aluminum foil is taken out of

DiKsa [7]

<u>Answer: </u>The amount of heat released is 84 calories.

<u>Explanation: </u>

The equation used to calculate the amount of heat released or absorbed, we use the equation:

$Q= m\times c\times \Delta T$

where,

Q = heat gained or released = ? Cal

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Putting values in above equation, we get:

$\Delta T={\text{Change in temperature}}=(10-50)^oC=-40^oC$

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3 years ago

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3 years ago

Mass box A = 10 grams; Mass box B = 5 grams; Mass box C—made of one A and one B Mass ratio A/B =

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Answer:

mass ratio of A/B is 2:1

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