Please help explain this My teacher sent us this video but it's still really confusing. Can anyone find any other resources or explain it better?

(delete the space between you and tube)

https://www. you tube. com/watch?v=xfr64zoBTAQ

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

How might this scientific phenomena be explained? a paper clip floats on water.

Type the letter that represents the correct location for each particle type below. the neutron is found at __ the electron is found at __ the proton is found at __