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Lubov Fominskaja [6]
3 years ago
6

The energy needed to destabilize existing chemical bonds and start a chemical reaction is called ____.

Chemistry
1 answer:
postnew [5]3 years ago
3 0
<span>If all chemical reactions that release free energy tend to occur spontaneously,why haven't all such reactions already occurred? One reason is that most reactions require an input of energy to get started.Before it is possible to form new chemical bonds,even bonds that contain less energy,it is first necessary to break the existing bonds,and that takes energy.The extra energy required to destabilize existing chemical bonds and initiate a chemical reaction is called activation energy.</span>
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What is the maximum number of covalent bonds that can be formed by one carbon atom? 1 2 3 4
Rainbow [258]
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5 0
3 years ago
What is the molar mass of a gas which has a density of 0.00249 g/mL at 20.0 degrees celcius and 744.0 mm Hg?
creativ13 [48]

61.24 is the molar mass of a gas which has a density of 0.00249 g/mL at 20.0 degrees celcius and 744.0 mm Hg.

Explanation:

given that:

density = 0.00249 g/ml (\frac{mass}{volume})  or 2.49 grams/litre

P = 744 mm Hg OR 0.978 atm

T = 20 Degrees or 293.15 Kelvin

R = 0.08206 Litre atm/mole K

molar mass =?

Formula used/

PV = nRT    equation 1

here n is number of moles:

n = \frac{mass}{atomic mass}

putting the value of n and value of density in the equation 1:

PV = \frac{mass}{molar mass} x RT

molar mass = \frac{mass}{volume} x \frac{RT}{P}

                    = density x \frac{RT}{P}

                     = \frac{2.49 x 0.08276 x 293.15}{0.978}

                     = 61.24 is the molar mass of the gas.

8 0
2 years ago
Why is respiration considered an exothermic process​
zavuch27 [327]

Answer:

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Explanation:

Good Luck!

7 0
3 years ago
Read 2 more answers
You can also enter units that are combinations of other units. Keep in mind that you have to indicate the multiplication of unit
drek231 [11]

Answer:

Weight = 98 kg.m/s^2

= 98 N.

Explanation:

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Weight = m*g

= 10 kg * 9.8 m/s^2

= 98 kg.m/s^2

= 98 N

3 0
3 years ago
In the preparatory reaction which involves moving pyruvic acid into the mitochondrion
eduard
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