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Novay_Z [31]
3 years ago
9

Volcanic molten lava pours out and re-hardens back into the rock again. Chemical change or physical change?

Chemistry
1 answer:
gogolik [260]3 years ago
6 0

Answer:

physical change

Explanation:

it it just re hardened

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How many carbon atoms are in each mole of calcium carbonate?
xeze [42]

Answer:

5 atoms are in each molecule of calcium carbonate

6 0
3 years ago
Write a conversion factor that converts between moles of calcium ions in calcium phosphide, Ca3P2, and moles of Ca3P2.
cricket20 [7]

The conversion factor between moles of calcium ion and moles of Ca_3P_2 in  Ca_3P_2 would be 3 to 1.

<h3>Mole fraction</h3>

Ca_3P_2 if formed from 3 carbon atoms and 3 phosphate atoms according to the equation:

3Ca + 2P --- > Ca_3P_2

Thus, there are 3 moles of calcium in every 1 mole of  Ca_3P_2.

The conversion factor between moles of calcium and moles of  Ca_3P_2 will. therefore, be 3 to 1 or simply 3:1.

More on mole fractions can be found here: brainly.com/question/8076655

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6 0
2 years ago
The formation of which product(s) will most likely be observed in a combustion reaction?
lianna [129]

Answer:

The formation of AN OXIDE

Explanation:

A combustion reaction is a chemical reaction which involves the burning of an hydrocarbon in oxygen

7 0
4 years ago
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What is a thermal insulation material that is no longer used because of formaldehyde gas emission?
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It was specifically designed to insulate the areas of the building that were hard to access. Unlike regular process, it was sprayed into the walls by using holes.

It is no longer used because it caused a raise in the formaldehyde gas in the residence. This gas caused irritations to the people living in the building. Residents started to report health issues like respiratory problems, and eyes, nose, throat irritation.

If you need to learn about the formaldehyde gas, click here.

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7 0
2 years ago
An example of an binary compound is
Ostrovityanka [42]
Sodium Chloride (NaCl) is a binary compound because there are only two elements in the compound.
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4 years ago
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