Answer: C
Explanation:
Some poly nuclear aromatic hydrocarbons are not carcinogenic in themselves. However, when these are made to interact with living cells, enzymes in the cells could convert the polynuclear aromatic hydrocarbon into a carcinogenic material such as benzo-[a]-pyrene. This can now interact adversely with the deoxyribonucleic acid of living cells leading to genetic mutation, that is, irreversible changes in the genes of organisms.
The answer is B.
occur gradually over millions of years.
Answer:
In the reaction, Fe2+ is oxidized and MnO4- is reduced (option c.)
Explanation:
MnO₄⁻ + 5Fe²⁺ + 8H⁺ ---> Mn²⁺ + 5Fe³⁺ + 4H2O
Look all, the oxidation number.
Increase the oxidation number means, oxidation.
Decrease the oxidation number means, reduction.
Fe²⁺ → Fe³⁺ is increasing, the ox. number. Fe is oxidizing.
In MnO₄⁻, the Mn acts with +7, so in Mn²⁺ has decrease the ox. number.
Mn has reducted.
Answer:
The heating and melting of candle wax
Explanation:
It heats up, but when cooled it hardens and cannot be put back into its original form.
Hope this helps
Please mark me as Brainliest
Answer:
0,218 moles
Explanation:
I will first explain how many liters is 256ml, that is 0,256 l.
because the m stands for milli which is a factor of 1000 -> (256 ml / 1000 = 0,256 l)
To calculate the amount of moles you multiply the volume with the concentration. So 0,256l x 0,855M = 0,218 moles.
