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valina [46]
3 years ago
9

List 2 of the important properties of gases.

Chemistry
1 answer:
Delicious77 [7]3 years ago
6 0
1. They expand to fill their containers
2. Their molecules move the most rapidly

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Is melting an ice cube on your hand a chemical or physical and why? Need reasons!!
xenn [34]
Physical, because the ice is only changing it's state. It's not changing to a new substance.
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2 years ago
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8.8 Why do esters with higher molecular mass not have strong fragrances?​
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Answer:

Basically, fragrances reach other person through sense of smell. So, the strength of the fragrances depends a lot on its evaporation, which is strongly related to the boiling point. Esters with higher molecular weight do not have a strong fragrance because it has a higher boiling point.

3 0
2 years ago
A
Artemon [7]

Answer:

9.8ms^{-2}

Explanation:

using the equation :

acceleration = \frac{final  velocity - initial velocity}{timetaken} \\                      a  =\frac{v-u}{t}

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t is 10seconds

a=\frac{98m/s- 0m/s}{10} \\a=\frac{98}{10}\\ a=9.8m/s^{2}

3 0
2 years ago
The pka of hf is 3.2 determine the pkb of hf?
Julli [10]

Well, first we must remember that

pK_{a}+pK_{b}=14

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K_{a}*K_{b}=10^{-14}

-log(K_{a}*K_{b})=-log(10^{-14})\\-logK_{a}+-logK_{b}=-log(10^{-14})\\pK_{a}+pK_{b}=14

So then

pK_{b}=14-pK_{a}=14-3.2=1.8

7 0
3 years ago
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What is the percent composition by mass for hydrogen in water (H2O)?
saw5 [17]

Explanation:

Percentage composition = 2/18 = 11.11%.

5 0
3 years ago
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