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finlep [7]
4 years ago
15

Which of the following is an endothermic reaction

Chemistry
2 answers:
OLga [1]4 years ago
8 0
D is your answer. :)
pashok25 [27]4 years ago
7 0
The answer is D an explosion 

An endothermic reaction is a chemical that is caused by heat and light.
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What is equal to the number of particles in 36 grams of carbon-12?
HACTEHA [7]

Answer:

3 moles

Explanation:

To solve this problem we will  use the Avogadro numbers.

The number 6.022×10²³ is called Avogadro number and it is the number of atoms, ions or molecules in one mole of substance.  According to this,

1.008 g of hydrogen = 1 mole =  6.022×10²³  atoms.

18 g water = 1 mole = 6.022×10²³ molecules

we are given 36 g of C-12. So,

12 g of C-12 = 1 mole

24 g of C-12 =  2 mole

36 g of C-12 = 3 mole

So 3 moles of C-12 equals to the number of particles in 36 g of C-12.

4 0
3 years ago
The following structure depicts three C atoms, two Br atoms, and eight H atoms,
Darya [45]

Answer: False

Explanation: There are four carbon atoms , eight hydrogen atoms and two Bromine atoms.

As the carbon forms four covalent bonds, every carbon must have four bonds and thus the formula of the compound is BrCH_2-CH(Br)-CH_2-CH_3.

IUPAC name of the compound is 1,2 di-bromobutane. As the carbon chain is 4 atoms long the word used is but and all the bonds are single bonds, thus the suffix used is ane.

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3 years ago
What is the chemical process of breaking down food and realeasing energy?
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chubhunter [2.5K]

Answer:

I belive it's the black chair because they were asking which chair experienced the most force in the begining and the black chair had the most force given.

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