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MrRa [10]
2 years ago
15

the formation of all heavenly bodies is governed by the law of electricity and magnetism the law of universal gravitation the el

ectromagnetic law no scientific law
Chemistry
1 answer:
maksim [4K]2 years ago
8 0
The law of Universal Gravitation.
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Which of these observations would be classified as a physical property
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A lemon juice cleans a penny. I believe this to be the answer because the lemon cleans the penny but no molecules change
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What is in an inorganic molecule?
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3 years ago
2 NaCL + CaO = CaCL2 + Na2O
Naily [24]

222 grams of calcium chloride is produced.

<h3><u>Explanation</u>:</h3>

The mole concept and the chemical equation are very much closely related with each other. In the chemical reaction, the compounds or elements in both sides are balanced according to the number of atoms of each side of the reaction. So from there we can easily find the amount of reactant reacts to produce desired product.

Here we can see that 2 moles of sodium chloride produces 1 mole of calcium chloride.

So, 4 moles of sodium chloride will produce 2 moles of calcium chloride.

Now, atomic weight of calcium =40.

Atomic weight of chlorine =35.5.

So,the molecular weight of calcium chloride = 40+ 35.5\times2

=111.

It means, 1 mole of calcium chloride weighs 111 grams.

So 2 moles of calcium chloride weighs 111\times2 grams = 222 grams.

7 0
3 years ago
assume you have a 500 g sample of a radioactive isotope with a half-life of 100 years. fill in the table showing how many grams
sweet-ann [11.9K]

Answer:

8.10 hours.

Explanation:

You start with 500.0g.

After the first half-life, you have 250.0g.

After the second, you have 125.0g.

After the third, you have 62.50g.

Therefore, it takes three half-lives to decay to 62.50g.

Therefore, the elapsed time must be triple the length of one half-life.

24.3

3

=

8.10

, so it is 8.10 hours.

Explanation:

3 0
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Gnesinka [82]

Answer:

Lateral

Explanation:

Is the opposite side of the midline

8 0
3 years ago
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