How many moles of copper are produced when 1.75 moles of iron (III) sulfate are produced in the single replacement reaction between iron metal and copper (II) sulfate?

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.

Which position represents spring in the southern hemisphere? a) b) c) d)

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.