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mina [271]
3 years ago
6

Compare and contrast chemical change and physical change.

Chemistry
1 answer:
Nadusha1986 [10]3 years ago
8 0
Physical involves changes that you can observe and describe matters. 

Chemical involves the chemical reaction.
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Please answer fast if can, will give Brainiest
Vilka [71]

From the absorption spectra of a gas, we can see the  amount of thermal energy the gas contains (option D).

<h3>What is the absorption spectra?</h3>

The absorption spectra shows us the energy that is taken in by a gas. We know that when a gas is heated, it absorbs energy which shows up in its absorption spectra.

Thus, from the absorption spectra of a gas, we can see the  amount of thermal energy the gas contains.

Learn more about absorption spectra:brainly.com/question/4239971

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7 0
2 years ago
Earth is currently 150 million km away from the Sun. If Earth was 200 million km away from the Sun, why would it no longer be ab
timurjin [86]

Answer:

The temperature would be too cold

Explanation:

4 0
3 years ago
Nevermind, scratch the question
Lyrx [107]
What question there’s no question on here
5 0
2 years ago
Why is hydrogen placed with the elements in group 1a??
N76 [4]
Because it has atomic no. = 1 (according to modern periidic table)
5 0
4 years ago
A solution prepared by mixing 10 ml of 1 m hcl and 10 ml of 1.2 m naoh has a ph of
blagie [28]

Answer: pH of resulting solution will be 13

Explanation:

pH is the measure of acidity or alkalinity of a solution.

Moles of H^+ ion = Molarity\times {\text {Volume in L}}=1M\times 0.01L=0.01mol

Moles of OH^- ion = Molarity\times {\text {Volume in L}}=1.2M\times 0.01L=0.012mol

HCl+NaOH\rightarrow NaCl+H_2O

For neutralization:

1 mole of H^+ ion will react with 1 mole of OH^- ion

0.01 mol of H^+  ion will react with =\frac{1}{1}\times 0.01mole of OH^- ion

Thus (0.012-0.01)= 0.002 moles of OH^- are left in 20 ml or 0.02 L of solution.

[OH^-]=\frac{0.002}{0.02L}=0.1M

pOH=-log[OH^-]

pOH=-log[0.1]=1

pH+pOH=14

pH=14-1=13

Thus the pH of resulting solution will be 13

7 0
3 years ago
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