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elixir [45]
3 years ago
9

What chemical changes happen at school

Chemistry
1 answer:
kykrilka [37]3 years ago
8 0

Burning, cooking

Explanation:

Chemical changes that happens in school are:

Cooking of meals

 Burning of wastes

 Chemical reactions in laboratories

Rusting of iron used in construction

  • A chemical change is a change that produces new kinds of substances.
  • These changes are usually accompanied by energy and mass changes.
  • Most of such changes are not reversible.

Chemical changes are driven by change in chemical properties of matter.

In a school, iron components might begin to rust. This is a chemical change.

learn more:

Chemical change brainly.com/question/9388643

#learnwithBrainly

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Type the correct answer in each box.
pishuonlain [190]

Answer:

5SiO2 + 2CaC2 → 5Si + 2CaO + 4CO2

Explanation:

shooo i needta be a jonir in high school n im only a freshman

lemme quit dha kapp i be using go.ogle for sum of dese buh ik these elements from the pheriotic table n ik that u gotta make both sides even

5 0
3 years ago
Can you make hydroxychloroquine from grapefruit and lemon rinds
MAXImum [283]

Hydroxychloroquine cannot be made from grapefruit and lemon rinds.

Hydroxychloroquine is not a natural compound, rather it can only be synthesized from quinoline molecule in the laboratories.

During the synthesis of hydroxychloroquine, several sequential chemical reactions and purifications are done.

Hydroxychloroquine is used in the treatment of:

  • malaria
  • systemic lupus erythematosus,
  • rheumatoid arthritis

But when grapefruit and lemon rinds are boiled in water, a natural chemical compound known as limonene is obtained.

Therefore, hydroxychloroquine cannot be made from grapefruit and lemon rinds,

Learn more here:

brainly.com/question/20113211

5 0
3 years ago
Given the reactions,
enot [183]

The enthalpy change of the reaction is <u>-1347.8 kJ.</u>

<h3>What is the enthalpy change, ΔH, of the reaction?</h3>

The enthalpy change, ΔH, of the reaction is calculated from Hess's law of constant heat summation as follows:

Hess's law states that the enthalpy change of a reaction is the sum of the enthalpies of the intermediate reaction.

Given the reactions below and their enthalpy values;

1. X (s) + 12 O₂ (g)⟶ XO (s) ΔH₁ = −850.5 kJ

2. XCO₃ (s) ⟶ XO (s) + CO₂ (g) ΔH₂ = +497.3 kJ

The enthalpy change, ΔH, of the reaction whose equation is given below, will be:

X (s) + 12 O₂ (g) + CO₂ (g) ⟶ XCO₃ (s)

ΔH = ΔH₁ - ΔH₂

ΔH = − 850.5 kJ - (+497.3 kJ)

ΔH = -1347.8 kJ

Learn more about enthalpy change at: brainly.com/question/14047927

#SPJ1

7 0
2 years ago
How are science and technology related? A. Science is a branch of technology. B. Science is the application of technological kno
Papessa [141]

The answer should be C. Technology is the application of the knowledge gained by science.

5 0
3 years ago
Read 2 more answers
Nonmetal oxides can react with water to form acids. For example, carbon dioxide reacts with water to form carbonic acid: CO2 H2O
mario62 [17]

Answer:

Explanation:

Diiodine pentoxide is I₂O₅

Reaction with water

I₂O₅ + H₂O = 2HIO₃

2 )   HIO₃  is called iodic acid.

6 0
3 years ago
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