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mr Goodwill [35]
3 years ago
15

The atomic number of potassium is 19. How many electrons does this element have?

Chemistry
1 answer:
Vinvika [58]3 years ago
7 0

Answer:

Potassium is an element that has 19 electrons

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how many moles of sodium are needed to react with sulfuric acid to produce 3.75 moles of sodium sulfate according to the followi
anastassius [24]
Hello!
<span>
You'll need to react 7,5 moles of Sodium with sulfuric acid to produce 3.75 moles of sodium sulfate
</span>
First of all, you need to balance the reaction. The balanced reaction is shown below (ensuring that the Law of Conservation of Mass is met on both sides):

2Na + H₂SO₄ → Na₂SO₄ + H₂

Now, all that you have to do is to use molar equivalences in this reaction applying the coefficients to calculate the moles of Sodium that you'll need:

molesNa=3,75moles Na_{2} SO_4* \frac{2 moles Na}{1 mol Na_{2} SO_4} =7,5 moles Na 

Have a nice day!
5 0
3 years ago
As the sun heats the surface of the ocean, two layers of water result. What separates the layers.
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Question:<u> As the sun heats the surface of the ocean, two layers of water result. What separates the layers.?</u>

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4 0
3 years ago
Explain why the place of aluminum in the reactivity wagon seems to be unsuitable.
Step2247 [10]

Answer:

Acids react with most metals.

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Explanation:

5 0
2 years ago
The measure of the amount of dissolved salt in a liquid sample is called
Ann [662]

The answer is salinity, salinity is the saltiness or dissolved inorganic salt content of a body of water.

7 0
4 years ago
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Explanation:

6 0
3 years ago
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