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Elan Coil [88]
3 years ago
15

Why is there a change in energy during chemical reactions?(1 point)

Chemistry
2 answers:
Firdavs [7]3 years ago
8 0

Energy is released by the formation of chemical bonds, and energy is

absorbed when the bonds are broken.

<h3>What is a chemical reaction?</h3>

A chemical reaction involves the formation of new compounds from

reactants . It involves the formation and breaking of bonds in the

elements.

Energy is released by the formation of chemical bonds and this type of

reaction is referred to as exothermic while energy is absorbed when the

bonds are broken and is referred to as an endothermic reaction.

Read more about Chemical reaction here brainly.com/question/16416932

ehidna [41]3 years ago
6 0

Answer:

Energy is released by the formation of chemical bonds, and energy is absorbed when the bonds are broken

Explanation:

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A fixed quantity of gas at 21 °c exhibits a pressure of 752 torr and occupies a volume of 5.12 l. (a) calculate the volume the g
mariarad [96]
A. PV=constant
752 torr = 0.989 atm
(0.989 atm)(4.38 L) = (1.88 atm)V
V = 2.30 L

B. T/V = constant
(294 K)/(4.38 L) = (448 K)/V
V = 6.67 L


Hoped this helped ( I believe it's right, sorry if it's not )
7 0
4 years ago
Read 2 more answers
1. Why fractional distillation has<br> fractionating column but not in simple<br> distillation?
egoroff_w [7]

Answer:

  • <em>Fractional distillation leads to a better separation than simple distillation because the glass beads in the fractionating column provide "theoretical plates" on which the vapors can condense and then re-evaporate, and re-condense, essentially distilling the compound many times over.</em>

Explanation:

<h2> please mark me as brainlist </h2>
5 0
3 years ago
What are the products of the following neutralization reaction (No need to balance)
Nina [5.8K]

HCI + NaOH --> NaCl + H2O

Neutralization reaction is the reaction between acid and base which results in formation of salt and water. Here salt is NaCl (common salt) in above reaction.

SO, (A) H20 + NaCl is your answer.

8 0
3 years ago
If 4.4 moles of al react, how many moles of h2so4 are consumed?
astraxan [27]
2 Al + 3 H₂SO₄ = Al₂(SO₄)₃ + 3 H₂

2 moles Al -------- 3 moles H₂SO₄
4.4 moles Al ------ ?

moles H₂SO₄ = 4.4 x 3 / 2

moles H₂SO₄ = 13.2 / 2

= 6.6 moles of H₂SO₄

hope this helps!
4 0
3 years ago
How many particles are in 1.40 x 10^7 mol of aluminum (Al)?
SpyIntel [72]

Answer:

<h3>Hlo there !! </h3>

<u>One mole of any substance contains 6.022*1023 structural units (atoms, molecules, ions, etc.). This number is known as the Avogadro constant.</u>

<u>One mole of any substance contains 6.022*1023 structural units (atoms, molecules, ions, etc.). This number is known as the Avogadro constant.So 1.04*107 mol of Al contains 1.40*107 * 6.022*1023 = 8.43*1030 structural units (in case of Al – atoms).</u>

<h3><u>8.43*1030 particles Al.</u></h3>

Explanation:

<h3>Hope this helps !!</h3>
5 0
2 years ago
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