The number of oxygen atoms are 6 atoms
<u><em>Explanation</em></u>
According to the law of mass conservation the number of reactant atoms is equal to number of product atoms.
For given equation to obey the law of mass conservation it need to be balanced as below
4 Al + 3 O₂ → 2 Al₂O₃
Al₂O₃ is the product,therefore the number of oxygen atom
= coefficient in front of Al₂O₃ × subscript of O
=2 x 3 = 6 atoms
Answer:
I believe the answer is C
Answer:
The amount of calcium carbonate will increase.
Explanation:
K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.
- K>Q , reaction will move forward by making more product.
- K<Q , reaction will move backward by making more reactant.

Equilibrium constant of the reaction = 
Concentration of 
Concentration of 
Concentration of 
![Q=\frac{[CaO][CO_2]}{[CaCO_3]}](https://tex.z-dn.net/?f=Q%3D%5Cfrac%7B%5BCaO%5D%5BCO_2%5D%7D%7B%5BCaCO_3%5D%7D)


This means that equilibrium will move in backward direction by which amount of calcium carbonate will increase.
The table with the data is in the picture attached.
Answer:
Explanation:
The reaction equation suggests that the law could have this form:
Then, the work is to find the values of the exponents that satisfy the initial rate data.
A first glance shows that for the third and fourth trials the initial rates are the same. Since for these two trials only the initial concentration of substance B changed (A and C were kept equal), you conclude that the reaction rate does not depend on B, and ist exponent (lower b) is 0.
Then, so far you can say:
When you use trials 1 and 2, you get:

Now, you can use trials 1 and 3 to determine the other exponent:

Thus, you have the rate law:
Now, you just use any trial to obtain k. Using trail 1:
Which yields: