Answer:
Catalyst is a substance that increases the rate of a chemical reaction but is chemically unchanged at the end of the reaction.
properties of catalyst :
1. A catalyst increases the speed of a reaction, and it also improves the yield of the intended product.
2. A catalyst actually takes part in the reaction even though it itself is not consumed or used up in the course of the reaction.
3. A catalyst makes the reaction faster by providing an alternative pathway with a lower activation energy.
4. A catalyst is reaction-specific. It may not be effective in another reaction even if the two reactions are of similar type.
5. In a reversible reaction, a catalyst accelerates both the forward and the reverse reactions. So, the inclusion of a catalyst does not alter the equilibrium constant of a reversible reaction.
Answer:
C
Explanation:
Pressure it says it in the name its the force of colliding particles
Answer:
Explanation:
The length is usually the longest side.
That would mean that 26.9 is the length.
Answer:
B
Explanation:
It's B because the first trial of an experiment may not always be right so you want to run multiple trials
Delta E= R[1/n^2 (initial) - 1/n^2 (final) ]
so transition n=3 to n=1 will emit more energy
