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crimeas [40]
3 years ago
12

Which of the following is an example of a physical change?

Chemistry
2 answers:
dangina [55]3 years ago
5 0
D it is only physical and not chemical
mars1129 [50]3 years ago
4 0

Answer:

D

Explanation:

Because a physical change is affecting the form of a chemical substance, not its chemical composition.

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Is C2H7 ionic or covalent? <br><br> what would you name NO4? <br><br> what would you name MgCl2?
Vlad [161]

C₂H₇ is a covalent compound

N0₄ will be name nitrogen(viii) oxide

MgCl₂ will be named magnesium chloride.

<h3>What are covalent compounds? </h3>

Covalent compounds are compounds which are formed when two electronegative atoms combine together by a sharing of electrons between them.

Covalent compound molecules are usually formed from a combination of non-metals.

The C₂H₇ is a covalent radical formed from the addition of a hydrogen ions to the covalent compound C₂H₆

<h3>What would you name NO₄?</h3>

The name given to a compound depends on the oxidation number of the component elements.

The oxidation number of oxygen is -2.

Since there are 4 atoms of oxygen, the total negative charge is -8.

Nitrogen will have to exist in the +8 state in order to give a neutral compounds.

Therefore, the name given to the compound will be nitrogen (viii) oxide.

<h3>What would you name MgCl₂? </h3>

Magnesium chloride, MgCl₂  is an ionic compound formed from the ionic bond between chlorine and magnesium.

Magnesium donates two electrons to two chlorine atoms to form magnesium chloride, MgCl₂.

Learn more about covalent and ionic substances at: brainly.com/question/18660895

7 0
2 years ago
Polyatomic ion formula for aluminum hydroxide
KonstantinChe [14]

Answer:

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7 0
3 years ago
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3 0
3 years ago
A 13.97 g sample of nabr contains 22.34% na by mass. Considering the law of constant composition (definite proportions) how many
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As per the law of constant composition, a given sample will always contain the same number of elements that combine in the same mass proportion.

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Hence:

Mass of Na = 5.75 g * 22.39/100 = 1.287 g

5.75 g of NaBr would contain 1.29 g of Na

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3 years ago
How many moles are in 3.4 x 10^23 atoms of O2?
Tamiku [17]

Answer:

5.00 moles..hope it helps

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