Answer:
The answer is "Choice A and Choice B"
Explanation:
The Zero-Order reactions are usually found if a substrate, like a surface or even a catalyst, is penetrated also by reactants. Its success rate doesn't depend mostly on the amounts of the various reaction in this reaction.
Let the Rate = k
As 
doesn't depend on reaction rate, a higher reaction rate does not intensify the reaction.
By the rate 
the created based and the reaction rate is about the same.
Answer:
A- beryllium
B- calcium
C- magnesium
Explanation
NOTE: all element in group 2 have 2 balance electrons
First let’s start with B- number of electrons= number of protons which is equal to the atomic number. therefore, the answer is calcium as it’s atomic number is 20
C- magnesium will have three energy levels considering it has 12 electrons (2,8,2).
A- beryllium is the lightest one in group 2 as it has the atomic mass of 9.0122.
Answer:
Freezing
Explanation:
liquid changing to a solid = Freezing
Answer:
Heated copper metal reacts with oxygen to form the black copper oxide. The copper oxide can then react with the hydrogen gas to form the copper metal and water.
Answer:
A decrease in reactant concentration reduces the frequency of successful collisions.
Explanation:
- The rate of any chemical reaction is the change in the concentration of the reactants with time.
Rate = - d[Reactants]/d(time).
- Also, the rate of a chemical reaction can be given by:
<em>Rate = k[Reactants]ˣ,</em>
where, k is the rate constant of the reaction.
x is the no. of moles that the rate of the reaction depends on.
So, it is clear that the rate of the reaction is directly proportional to the concentration of the reactants.
- The concentration of the reactants is at its maximum value at the time of the start of the reaction "mix up", so, the rate of the reaction is maximum at the start of the reaction.
- So, the rate of most reactions decrease over time due to there is a decrease in the concentration of the reactants with time and so, the chance for collision of the reactants decrease.
<em>A decrease in reactant concentration reduces the frequency of successful collisions.
</em>
