HELP PL ASAP im so desperate to get this done my course is due in 2 days and im sick so if you can help plz plz plz do if i dont finish it ill be forced to redue the whole course over again plzz im literally dyeing of stress and this cold is not helping In this project, you will conduct research on a substance called polypropylene and explore the relationship
between its properties and its molecular structure. You will provide an explanation of how the molecular
structure is well suited for commercial use. You will also create a model of polypropylene to display its
structure.

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

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.