The correct answer is 9 .
Answer:
A. The number of moles of HNO2 will remain the same. True
B. The number of moles of NO2- will remain the same. False
C. The equilibrium concentration of H3O will remain the same. False
D. The pH will decrease. False
E. The ratio of [HNO2] / [NO2-] will remain the same. True
Explanation:
The mixture of nitrous acid and potassium nitrite is a buffer solution. Hence the properties outlined above. Buffer solutions are designed to militate against changes in acidity or alkalinity. This explains why the above statements were categorized as true or false accordingly.
<u>Answer</u>:
By tracking oxidation numbers we can identify the number electron in the atom
<u>Explanation</u>:
Tracking of electrons helps us to know when and how many electrons get transferred from one atom to other atom . Oxidation referred as the “loss of one or more electrons” by an atom. When the oxidation number of an element increases, there is a loss of electrons and that element is being oxidized. Oxidation numbers are usually written with the sign (+plus or −minus) followed by the magnitude, which is the opposite of charges on ions. In their elemental stage oxidation number of an atom is zero.
Ok I know this did it last year let's see chemical because you can't fix it back to its normal self
Option C is correct consumers use producers and consumers by decomposers which back to the producers
