Construction crews sometimes use this reaction for welding underwater structures:

fe2o3 + 2al → al2o3 + 2fe

how many moles of iron (fe) would be produced if 2.50 mol fe2o3 react? make sure to use the correct number of significant figures in your answer.

2.50 mol fe2o3 =

5 moles of iron (Fe) would be produced if 2.50 mol of Fe₂O₃ reacted.

Explanation:

The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three. Remember that proportionality is a constant relationship or ratio between different magnitudes.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied. To solve a direct rule of three, the following formula must be followed:

a ⇒ b

c ⇒ x

So:

The rule of three in this case is applied as follows: if 1 mole of Fe₂O₃ produces 2 moles of Fe by stoichiometry, 2.5 moles of Fe₂O₃ how many moles of Fe will it produce?

moles of Fe= 5

5 moles of iron (Fe) would be produced if 2.50 mol of Fe₂O₃ reacted.

b. is the answer hoped i        

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.