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Bad White [126]
3 years ago
8

21.

Chemistry
1 answer:
Bond [772]3 years ago
7 0
The answer is A. The pH decreases
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A sample of water is being heated over a flame. What happens to the water as it is heated?
lawyer [7]
As the water is heated, c. the kinetic energy of the water molecules increases. Kinetic energy is the energy caused by an object's motion. This means that water molecules tend to move faster when heated. This is related to its temperature increase, as temperature is directly proportional to kinetic energy.
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3 years ago
1 dozen apples=2.0kg whats the mass of 7 red apples
n200080 [17]

Answer:2.0x 7=14

Explanation:simce 1 dozen of apples is 2.0kg just multiply it by the 7 red apples which gives u 14 and that’s the mass of the apples

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How much of a sample remains after three half-lives have occurred? 1/16 of the original sample 1/9 of the original sample 1/8 of
Drupady [299]
For this question, assume that you have 1 compound. This compound is divided in half once, so you are left with 0.5. That 0.5 that remains is divided in half again, this is the second half-life, and you are left with 0.25. The final half life involves dividing 0.25 in half, which means you are left with 0.125. For the answer to make sense, you need to know your conversions between decimals and fractions. To make it simple, if you have 0.125 and you times it by 8, you are left with your initial value of 1. Therefore, after three half-lives, you are left with 1/8th of the compound.
5 0
3 years ago
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What subatomic particle has a negative charge and maintains an orbital cloud around the nucleus of the atom?
Anastaziya [24]

Answer:

Electron

Explanation:

The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.

Symbol= e⁻

Mass= 9.10938356×10⁻³¹ Kg

It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.

While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.

Symbol of proton= P⁺

Symbol of neutron= n⁰

Mass of proton=1.672623×10⁻²⁷Kg

Mass of neutron=1.674929×10⁻²⁷Kg

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.  All these three subatomic particles construct an atom.

7 0
3 years ago
What has the greatest amount of gravitational pull of the solar system
mrs_skeptik [129]

Answer:

The sun has nearly 99.98% of the mass of the Solar System, which classifies it as having the greatest amount of gravity.

Explanation:

3 0
3 years ago
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