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mihalych1998 [28]
3 years ago
10

Test tubes are used mostly for _____. A. storing experimental samples B. making precise measurements of liquids C. containing ex

tra chemicals left over from an experiment D. holding substances so they can be viewed using a microscope
Chemistry
1 answer:
Annette [7]3 years ago
8 0

Answer: A) Storing experimental samples

Explanation:

It is a common piece of laboratory glassware that can be made of glass or plastic and is opened at the top and closed at the bottom.

It cannot be used for measurements because there is no graduation indicating the volume.

Althought it can contain extra chemicals left over from an experiment, it is not the main proposal of the glassware that is to store samples.

It cannot be used in a microscope and the object for that is a microscope slide.

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Which diagram represents an electrically neutral atom​?
Rom4ik [11]

Answer:

D

Explanation:

I hope this right, I'm sorry if it's not.

For an atom to be neutral, it has to have the same amount of protons and electrons. Because protons and electrons have opposite charges, when there is an equal amount of them they balance each other out

5 0
3 years ago
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"Atoms of magnesium and oxygen form ions and ionic bonds "The difference is that instead of having each atom gain or lose one el
Tanzania [10]

Explanation:

Atomic number of magnesium is 12 and its electronic distribution is 2, 8, 2. To attain noble gas configuration it is necessary for the magnesium atom to lose two valence electrons and therefore, it forms Mg^{2+} ions.

On the other hand, atomic number of oxygen atom is 8 and its electronic distribution is 2, 6. To attain noble gas configuration it needs to gain two electrons. And, on gaining the electrons it forms O^{2-} ions.

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3 years ago
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Vedmedyk [2.9K]
25 sugar because the mass should be equal on both sides
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2. To what volume will you have to dilute 20.0 ml of a 8 M HCl solution to make a 0.35 M
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You need to dilute 8 M HCl to 0.35 M to make 457 mL.

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