Iron(iii) oxide, fe2o3, is a result of the reaction of iron with the oxygen in air. a. what is the balanced equation for this reaction? (use the lowest possible coefficients. omit states of matter.) b. what number of moles of iron reacts with 17.15 mol of oxygen from the air? mol c. what mass of iron is required to react with 17.15 mol of oxygen? mass =

(a)

(b) 22.9 moles of Fe

(c) 1278.8 g of Fe

Explanation:

(a) To write the equation you have to take in account that as the problem says that is oxygen in air you should write it as

So, first the problem is telling you that iron reacts with oxygen in air, so you should write the reactants:

Then the problem says that it produces iron(III) oxide , so you should write the product:

Finally you should balance the equation, so you need to have the same quantity of each atom in both sides of the equation:

(b) You should use the stoichiometry of the balanced equation to solve this part, so:

(c) To solve this part, you need to know that the molar mass for the Fe is , so:

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them