Progress through this unit of study we will add to your understanding of this type of change. For each of the numbered scenarios below, watch the video linked and answer the questions
that follow.
1. The reaction of iron and sulfur.
a. Watch the Iron and sulfur video
b. In the video you can observe iron reacting with sulfur to form a new substance,
iron (II)sulfide. Using our classification language, how would you describe iron,
sulfur and iron sulfide. In other words, what type of substance are each of these?
i. Iron:
ii. Sulfur:
iii. Iron (II) sulfide:
c. In the space below draw a formula unit for each of the substances
Iron
sulfur
iron (II) sulfide

The answer is 4 i don't know if its right let me see.

Ithe undersigned only for use your own email and delete any and copies and of the itself and to be there is a good timewhat does a decrease in temperature indicate about the molecules in a sample of liquid water? decreased chemical energy of the moleculesdecreased kinetic energy of the moleculesincreased chemical energy of the moleculesincreased kinetic energy of the moleculeshow does a sample of helium at 15 â°c compare to a sample of helium at 215 k? the helium at 15 â°c has a higher average kinetic energy than the sample at 215 k.the helium at 15 â°c has lower nuclear energy than the sample at 215 k.the helium at 15 â°c has slower-moving atoms than the sample at 215 k.the helium at 15 â°c has smaller atoms than the sample at 215 k.

The velocity would be 2 

Kim jong un.yeet jkany leaking in the power plant can directly cause radiation and other bio hazards.brainliest answer pls.