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DedPeter [7]
3 years ago
8

I need this quickly please god bless u all

Chemistry
1 answer:
larisa86 [58]3 years ago
3 0

Can't see well , post again and ill make sure to help.

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What is the differnce between the atomic number and the mass number of an element?
MrRissso [65]
Atomic number refers to the number of protons within the nuclei of an element's atoms (and therefore the number of electrons) while mass number refers to the number of protons and neutrons within the nucleus.
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3 years ago
Ice melts after adding heat. The free energy is ————— !
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Answer: F. Endothermic…………………
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The plunger on a bicycle pump with a 400 mL volume cylinder is
Kobotan [32]

Answer:

The answer to your question is V2 = 66.7 ml

Explanation:

Data

Volume 1 = V1 = 400 ml

Pressure 1 = P1 = 1 atm

Volume 2 = V2 = ?

Pressure 2 = P2 = 6 atm

Process

1.- To solve this problem use Boyle's law

                     P1V1 = P2V2

-solve for V2

                     V2 = P1V1 / P2

-Substitution

                      V2 = (1)(400) / 6

-Simplification

                      V2 = 400 / 6

-Result

                      V2 = 66.7 ml

4 0
3 years ago
What are the properties of gas
Oksana_A [137]

Answer:

1) easy compressed

2) fills its container

3) far more space

Explanation:

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What gives the gem amethyst its purplish color?
Aleks [24]
Answer will be B:Iron
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