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3 years ago

WILL GIVE BRANLIEST AND 30 POINTS!! Please help!

1 answer:

8 0

Phase changes happen as the temperature changes.
All matter can move from one state to another. It may require extreme temperatures or extreme pressures, but it can be done. Sometimes a substance doesn't want to change states. You have to use all of your tricks when that happens. To create a solid, you might have to decrease the temperature by a huge amount and then add pressure. For example, oxygen (O2) will solidify at -361.8 degrees Fahrenheit (-218.8 degrees Celsius) at standard pressure. However, it will freeze at warmer temperatures when the pressure is increased.

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1- What is temperature?

Katen [24]

Answer:

the sum of average kinetic molecules of the body is called temperature..

5 0

3 years ago

Calculate the ph of sweater which has a hydrogen ion concentration of 1 times 10 to the power of 8

telo118 [61]

Answer:

The pH of the sweater containing Hydrogen ion concentration

$[H^{+}]=1\times 10^{-8}$ is

8

Explanation:

pH = It is the negative logarithm of activity (concentration) of hydrogen ions.

pH = -log([H+])

Now, In the question the concentration of [H+] ions is :

$[H^{+}]=1\times 10^{-8}$

$pH = -log(1\times 10^{-8})$

use the relation:

$log(10^{-a})=a$

$pH= -(-8)$

pH = 8

Note : 1 times 10 to the power of 8 must be" 1 times 10 to the power of -8"

If the concentration is

$[H^{+}]=1\times 10^{8}$

Then pH = -8 , which is not possible . So in that case the pH calculation is by other method

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3 years ago

Scientific Notation - PLEASE HELP!

zmey [24]

Answer:

0.0931 is the ans i think

8 0

3 years ago

I need help ASAP!!!!!!!!!!!!!!!!!!!

liraira [26]

last one? don't take my word though

Explanation:

the suns heat is related to nuclear fusion

6 0

2 years ago

What are two observations you made from viewing the solar system model?

oksian1 [2.3K]

Answer:

The two observations we made from viewing the solar system model are as follows as:

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2). The sun is at the centre of our solar system and all the planets are equidistant to each other planets and also revolve around the sun.

3 0

3 years ago