The amount of energy required to change the temperature or phase of a reactant
Explanation:
Reaction equation for the given chemical reaction is as follows.

Equation for reaction quotient is as follows.
Q = 
= 
= 0.256
As, Q > K (= 0.12)
The effect on the partial pressure of
as equilibrium is achieved by using Q, is as follows.
- This means that there are too much products.
- Equilibrium will shift to the left towards reactants.
- More
is formed.
- Partial pressure of
increases.
The atomic number is always equal to the number of protons. It will be equal to the number of elections also if the atom has a neutral charge.
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Answer:
A (H)
Explanation:
The key uptop shows all the red are non metal and "H: is pink
Friction is the force that slows down a ball, if their were no friction, it would not stop.
Answer: friction