How many atoms of phosphorus are present in 859 mg of diphosphorus pentoxide? (For the final answer, must do significant figures if possible) *This is a grade 11 practice question please do not answer in a level above that because I won't understand.* *Also please show me the solutions so that I know how you got the answer*

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

i dont know the answe

c. electrical charges of ionic bonds.