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tino4ka555 [31]
3 years ago
13

A temprature change in a reaction indicates

Chemistry
1 answer:
umka21 [38]3 years ago
3 0

Chemical change

Explanation:

Often times, in chemical reactions, a temperature change indicates that a chemical change has occurred.

What is a chemical change?

  • It is a kind of change in which new products are formed.
  • Chemical changes are usually accompanied by energy changes in reactions.
  • The process is not easily reversible.
  • It usually involve a change in mass.
  • Requires considerable amount of energy

When temperature change occurs, it usually denotes chemical change.

learn more:

Chemical change brainly.com/question/9388643

#learnwithBrainly

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With your class, look up the element names for each symbol in the word "BOOK" and list the element names.
aleksandr82 [10.1K]

Explanation:

The word BOOK; is made up of 4 letters and each actually represents the symbol of an element.

An element is a distinct substance that cannot be split-up into simpler substances.

  B    -   Boron

  O    - Oxygen

  O   - Oxygen

  K   - Potassium

We can see that the word BOOK shows us elements boron, oxygen, oxygen and potassium.

3 0
3 years ago
2FeCl3 + MgO -&gt; Fe2O3 + 3MgCl2<br> Convert 3.00 moles of MgO to moles of Fe2O3
nikitadnepr [17]

71.8 g of iron (III) oxide (Fe₂O₃) were produced from 3 moles of magnesium oxide (MgO).

Explanation:

We have the following chemical reaction:

2 FeCl₃ + 3 MgO → Fe₂O₃ + 3 MgCl₂

We see from the chemical reaction that 3 moles of magnesium oxide (MgO) will produce 1 mole of iron (III) oxide (Fe₂O₃).

number of moles = mass / molar weight

mass = number of moles × molar weight

mass of Fe₂O₃ = 1 × 71.8 = 71.8 g

Learn more about:

number of moles

brainly.com/question/13981579

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What factor would affect the pH of a waterway?
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Acid Rain. Hope i helped you!
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What is the molar mass of HCI
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36.46 g/mol is the answer
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Answer:

1.  A.

2. D.

3. E.

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