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Nostrana [21]
3 years ago
8

How do you know that a combustion reaction is exothermic

Chemistry
1 answer:
kap26 [50]3 years ago
5 0
When you burn wood it gives off heat. that heat is what makes the combustion reaction exothermoc
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Is C2H2 + 2H2 ----- C2H6 a substitution reaction​
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Answer:

No

Explanation:

No, this is an addition reaction

HC≡CH + 2H-H ----> H3C - CH3

3 0
3 years ago
A certain amount of gas is trapped in a nonrigid container at atmospheric pressure. If the container is cooled and the gas in th
Akimi4 [234]

Answer:

D. The volume of the container will decrease.

Explanation:

  • We apply here, the general gas law of ideal gases:

<em>PV = nRT,</em>

where, P is the pressure of the gas.

V is the volume of the container.

n is the no. of moles of the gas.

R is the general gas constant.

T is the temperature of the gas.

  • We are given that P is constant.

Also, n is constant as there is no added external gases.

T is decreased as the container is cooled.

So, the volume will change as the container is nonrigid.

<em>V α T.</em>

The volume is directly proportional to the temperature,

<em>Thus, as the container is cooled, the T will decrease, and the volume of the container will decrease.</em>

8 0
3 years ago
How to find protons neutrons and electrons of carbon?
Kryger [21]
Protons is the number of the element on the periodic table. Electrons are the same number of protons and i'm sorry I do not know neutrons, I hope I helped!

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3 years ago
N2 + 3H2 = 2NH3
My name is Ann [436]
This is so basic bro u gotta first move
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All atoms of the same element have the same what?
Paraphin [41]

Answer:

must have the same number of protons

8 0
2 years ago
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