Answer:
Lichens can be used as air pollution indicators, especially of the concentration of sulphur dioxide in the atmosphere. Lichens are organisms that grow in exposed places such as rocks or tree bark. They need to be very efficient at absorbing water and nutrients to grow there.
Answer:
Halogens family
Explanation:
Be familiar with the periodic table
All phosphorus atoms have the same atomic number. Hope i helped
The percent by mass of potassium in K3Fe(CN)6 is 35.62%.
