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kolbaska11 [484]
3 years ago
15

2. Scientist use ________ to measure the distance between stars.

Chemistry
1 answer:
UNO [17]3 years ago
7 0
Scientists use parallax to measure the distance between stars
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The distance between the nuclei of two iron atoms is about 4 angstroms.a. Trueb. False
vladimir2022 [97]

Answer:

The correct option is b. false

Explanation:

The distance between the nucleus of an atom and it's outermost shell is called is atomic radius. The atomic radius of an Iron atom (Fe) is 0.126 nm or 1.26 angstrom. The distance between the nuclei of two Iron atoms will be 1.26 × 2 = 2.52 angstroms.

Since 2.52 angstroms is lower than 4 angstroms, the correct option is false

8 0
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a)  Li<Na<Rb

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4 0
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Molecules can be composed of ____. Select all that apply. … two of more of the same atoms two or more smaller molecules two or m
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Explanation:

A group of two or more smaller molecules is the correct answer

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What is the name of MnO? Explain how you determined the bond type and the steps you used to determine the naming convention for
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Magnesiumoxide

Explanation:

I don't know

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3 years ago
When substances go through chemical changes, which of the following will always happen? A. Exactly one new substance will form a
tiny-mole [99]
I think b is the answer 
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