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irinina [24]
2 years ago
12

Explain physical and chemical change with an example.

Chemistry
1 answer:
tiny-mole [99]2 years ago
5 0

Answer:

Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc. Generally, physical changes do not involve the production of energy

Explanation:

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3 years ago
1.) which of these is the balanced equation for this reaction?
horsena [70]

Answer:

1.D) CH4 + 2O2 → CO2 + 2H2O

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Explanation:

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6 0
3 years ago
How many moles of lithium chloride will be formed by the reaction of chloride with 4.28 mol of lithium bromide in the following
lys-0071 [83]

Answer:

The answer is 4.28 moles

Explanation:

This is super easy okay, you won't forget this!

Basically mole ratios, we're just looking at the coefficients in front of the compounds, multiplying them, and dividing them as we see fit.

In this example, you can see how you need 2 moles of lithium bromide (LiBr) for the reaction, and 2 moles of lithium chloride (LiCl) will be produced.

Basically, the <u>molar ratio</u> is when you divide numbers and see how much of this do I have for that (if that makes sense).

So if you were to divide the 2 moles of LiBr / 2 moles of LiCl = 1. So we know that the mole ratio for LiBr to LiCl is 1:1 or 2:2, either or, it's the same thing.

SO THE BIG IDEA, if we have 4.28 moles of lithium bromide reacting, we should also have 4.28 moles of lithium chloride produced, BECAUSE the <u>mole ratio</u> is 1:1.

I hope this makes sense please tell me if it doesn't, I will try my best to explain a little more.

7 0
3 years ago
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