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Lunna [17]
3 years ago
15

All atoms of the same element must have the same number of what?

Chemistry
2 answers:
Pavel [41]3 years ago
6 0

Answer:

A.

Explanation:

i just took the test and chose A.protons. lily~chan hopes she helps

torisob [31]3 years ago
3 0

Answer:

A. protons

I hope this helps!

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2Ag+(aq) + CO2-_3(aq)-----------Ag2CO3
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All molecules are always made of
Andreas93 [3]

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Atoms and matter

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On a cold morning, the smoke coming out of a chimney is observed to be in blue color. What could be the reason? Name the effect
nirvana33 [79]

Stack effect? I'm not totally sure about this...

Explanation:

Large amount of tiny particles of water droplets, dust and smoke are present on a misty day. These tiny particles in the air scatter blue colour of white light passing through it. When this scattered light reaches our eyes, the smoke appears blue.

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3 years ago
The coefficient of performance (cop) of a refrigerator is defined as the ratio of?
Vinvika [58]

The coefficient of performance (cop) of a refrigerator is defined as the ratio of " the work necessary to heat or cool something usefully."

The usable heating or cooling delivered to work required ratio, also known as the coefficient of performance, or COP, of a heat pump, refrigerator, as well as air conditioning system. Higher efficiency, less energy (power) usage, and thus reduced operational costs are all related to higher COPs.

Coefficient of performance formula:

K = Q_{H} / W_{in}

where, K = Coefficient of performance, Q_{H} = heat of pumps output, W_{in} = work required by the system.

It is refrigeration's coefficient of performance (COP) will always be greater than 1.

Therefore, the coefficient of performance (cop) of a refrigerator is defined as the ratio of " the work necessary to heat or cool something usefully."

To know more about  coefficient of performance

brainly.com/question/14058512

#SPJ4

3 0
2 years ago
Volume is the independent or dependent variable
m_a_m_a [10]

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Independent

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