1) Left up: a chemical change. We can see new substance (red-blue) is formed from one blue and one red atom.
In chemical change new substances are formed, the atoms are rearranged and the reaction is followed by an energy change.
2) Left down: a chemical change. We can see new substance (red-blue) is formed from two blue and one red atoms.
3) MIddle: a physical change. There is no new substance. Bonds are not broken.
4) Right up: a chemical change. Bonds are broken.
5) Right down: a physical change. Change of state of matter.
Answer:
Option a is the right one
Explanation:
Redox reactions are defined as the reactions where one element is oxidized (so the oxidation state is increased); and another element is reduced (oxidation state decreases). These changes in the oxidations states are defined by a transference of electrons.
When the oxidation state decrease → reduction → the element gains electrons
When the oxidation state increase → oxidation → the element release electrons
Part 1)
1) Carbon: C
2) C
3) E
4) M
5) C
6) C
7) Salad? Like the vegetable? Its a M
8) C
9) M
Part 2)
10) C
11) E
12) B
13) A
14) D
Part 3) I’ll do it in the comments.
Answer:
This is the partial pressure of Ar in the flask. A 1.00 L flask is filled with 1.20g of argon at 25 degrees C. A sample of ethane vapor is added to the same flask until the total pressure is 1.400atm .
Explanation: