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wolverine [178]
3 years ago
15

Whitch statemeant correctly describes a physical change.

Chemistry
2 answers:
lukranit [14]3 years ago
4 0
Answer:
The answer is B
Yuliya22 [10]3 years ago
3 0
The answer is B ( and all your gonna do now is freak the freak out)
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What are the formulas for the ionic compounds named sodium iodide and magnesium iodide
bixtya [17]

Sodium Iodide: NaI

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8 0
2 years ago
Selenium (Se) has 30 protons and 20 neutrons in each atom, therefore its atomic
allochka39001 [22]

Answer:

30, 50

Explanation:

Hello,

In this since an element's atomic number is equal to the number of protons in its atom, we can infer that selenium's atomic number is 30. Moreover, due to the fact the the neutrons are equal to the atomic mass minus the atomic number or the number of protons, by knowing the number of neutrons we compute the atomic as follows:

neutrons=mass-protons\\\\mass=neutrons+protons\\\\mass=30+20\\\\mass=50a.m.u

Thus, answer is 30, 50.

Best regards.

8 0
3 years ago
I need the answers of these
Anni [7]

Answer:

Hope this helps :D

Explanation:

Metal: Aluminum and Copper

Non-Metal: Hydrogen and Flourine

Acid: Sulfuric Acid and Phosphoric Acid

Alkali Metals: Hydrogen and Lithium

Compounds: Water and Carbon Dioxide

Elements: Carbon and Oxygen

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1 year ago
Give two reasons why people should use petrochemicals wisely.
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I. Because they're a limited resource

2 Because they're a cause of carbon pollution.
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you have accidentally broken a test tube and spilled a chemical on the bench. which of the following best describes what you sho
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Tell the teacher, do NOT clean it up yourself.

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