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Galina-37 [17]
3 years ago
15

Help Anyone please PLEASE PLEASE PLEASE ALSO PLEASE DO NOT DO THIS FOR POINTS

Chemistry
1 answer:
GarryVolchara [31]3 years ago
6 0
A. The box will move to the right
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Plutonium-196 has an atomic number of 78. It has ____ neutrons.
Step2247 [10]

Answer:

118 neutrons

Explanation:

There are three subatomic particles in an atom namely: electron, neutron and proton. The mass number of an atom is calculated by adding the proton no. (atomic mass) + neutron no.

That is;

Mass no. = proton no. + neutron no.

This means that to obtain the neutron no. in the atom of an element, we subtract the no of protons or atomic mass from the mass number.

According to this question, Plutonium-196 is said to have an atomic number of 78. The mass no. is 196, hence, the number of neutrons is:

196 - 78

= 118 neutrons.

8 0
3 years ago
Graph of the relationship between mass and thermal energy
elixir [45]

<em>Thermal energy</em> is the sum of the kinetic and potential energies of all the particles in an object.

Assume that you have 250 gL of water and 1 kg of water at the same temperature.

Then, each water molecule has the same kinetic energy.

The larger sample contains four times as many molecules, so it contains four times as much thermal energy.

Thus, thermal energy is directly proportional to mass.

In symbols, <em>KE </em>∝ <em>m</em> or <em>KE = km</em>.

The graph of a direct proportion is a <em>straight line passing trough the origin</em>.

It should look something like the graph below.

6 0
4 years ago
Is mass conserved when 50 g of sugar undergoes a physical change? Use complete sentences to support your answer by explaining ho
Andrew [12]
It is not, because the mass is being conserved and not changed. 
A

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3 years ago
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Describe the energy changes occurring of a glass of ice water and a glass of water
MatroZZZ [7]
I think it will stay the same. 
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3 years ago
This occurs when 2 or more organisms or populations in a community rely or need similar limiting resources.
Kay [80]

Answer:

competition i belive

Explanation:

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3 years ago
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