Answer:
A is the correct option
Explanation:
batteries have chemical energy and will convert to electricity and when reached to bulb, it emits light as electromagnetic rays
D
Molecules consist of multiple atoms put together to create a new form.
Answer:
True
Explanation:
Hydrogen has three naturally occuring isotopes and copper has two.
Answer:
D H2PO4– + HPO42–
Explanation:
The acid dissociation constant for
are
respectively.



The reason while option D is the best answer is that, the value of pKa for both
lies on either side of the desired pH of the buffer. This implies that one is slightly over and the other is slightly under.
Using Henderson-Hasselbach equation:

Answer:
2 electrons
Explanation:
Since the atomic structure is at it's neutral state