Answer: option A. 2
Explanation: in the formula Sr3(PO4)2, the 2 behind (PO4) is affecting both P and O4. It means that we have P2 in the formula
Due to the other pesticides have outgrown their strength on today’s insects. All must be accompanied by mass paperwork for safety.
THE MOLAR MASS OF FLUORINE IS 35G/MOL