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3 years ago

What is the charge on an electron?

Chemistry

2 answers:

wariber [46]3 years ago

4 0

Answer:

positive

Explanation:

xxTIMURxx [149]3 years ago

3 0

Answer

1.60217662 × 10-19 coulombs

Explanation:

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Why cant you use pure sodium for cooking

Alexus [3.1K]

Pure sodium can severely harm your body (toxic) which can lead to death

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3 years ago

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What is the molarity of a solution in which 250 grams of NaCl are dissolved in 2.9 L of water?

Maksim231197 [3]

Answer:

About 1.48 M.

Explanation:

The formula for molarity is mol/L.

So firstly, you must find the amount of moles in 250 grams of NaCl.

I do this by using stoichiometry. First, I find how nany grams are in a single mole of NaCl. This is around 58.44 grams/mole. Now that I know this, I can now use a stoich table. (250 g NaCl * 1 mol NaCl / 58.44 g NaCl). I plug this into my calculator.

I get that 250 grams of NaCl is equal to about 4.28 moles.

Now I just plug into the formula!

4.28 moles/2.9 L = about 1.48

I've attached a picture of my personal notes below which shows work I have done in similar equations.

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2 years ago

What is the number of molecule(s)?

Gemiola [76]

1. 4NHCO3

2. 3CaCO3

3. 5NaC2H3O

4. 6NH3

5. 2CaCl2O2

ans ( a). NHCO3

5 0

3 years ago

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Can anyone do these? or even just help .. It is urgent and I've put up all of my points. I've been able to complete everything e

Lorico [155]

A3B2
bond is ionic
A is in group 2 (you can pick any like Ca)
B is in group 5 (like B)
the other question:
the reason is they are neutral gas and they already have 8 electrons except for He which is 2 and are completely stable so don't want to loose any electron vs Li and Na which have only 1 electron in the outer layer and are willing to loose that one to become stable.

7 0

3 years ago

What happens to wavelength as wave frequency increases?

KengaRu [80]

Answer:

As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

Explanation:

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3 years ago