I need help figuring out this problem, please be detailed

Question

In an experiment, the reaction of 10.00g of iodine product 144.9g of a compound formed of iodine and fluorine.

a) what mass of fluorine was consumed in the reaction

b) what’s the mass ratio of iodine and fluorine in the compound ?

c) what is the mass in grams of this compound would be ?expected to form the same experiment if you started with 85.2 g of iodine ?

Answer 1

a) Since 10.00 g of iodine reacted and produced a compound containing iodine and fluorine with a mass of 144.9g, the difference between these two numbers must represent the mass of fluorine that reacted with the 10.00 g of iodine. 144.9 g - 10.00 g = 134.9 g fluorine.

b) The mass ratio of iodine TO fluorine is 10.00 g iodine/134.9 g fluorine = 0.07413. The mass ratio of fluorine to iodine is 134.9 g/10.00 g = 13.49

c) You can use a proportion here. (10.00 g iodine/144.9 g compound) = (85.2 g iodine/x g compound). Solving for x by cross multiplying gives a mass of compound equal to 1235 g compound or 1230 g with 3 significant figures. This number should be 8.52 times larger than 144.9 since 85.2 g/10.00g = 8.52. It is!

You can also use the mass ratio here. There is 13.49 times as much fluorine as iodine. Multiply the mass of iodine (85.2 g) by 13.49 to get the mass of fluorine and then add this to the mass of iodine (85.2 g). You get the same result.

I hope this helps! :)

Answer 2

In this question, we must assume that there are no other reactants or products than the iodine & fluorine and the product of I & F and all of the iodine & fluorine are consumed. It follows then that if there is 10.00 g of iodine and the product has a mass of 144.9 g then the mass of the fluorine in the compound must be the difference between the two: 144.9 g I_xF_y- 10.00 g I= 134.9 g F

The mass ratio of the F to I would then be 134.9/10.0 = 13.5:1

So, if we were to use 85.2 g of iodine we would need 13.5 times as much fluorine, or 1235 g.

As I see it, the fact that iodine & fluorine are diatomic molecules would have nothing to do with this question as asked.