Question

How many grams of hydrochloric acid will react completely with a block of gold is 3.2 cm by 3.8 cm by 2.8 cm, if the density of gold is 19.3 g/mL? Show all steps of your calculation as well as the final answer.

Au + HCl → AuCl2 + H2

@nacholover

Answer 1

Sorry I'm in 10th Chemistry.

Answer 2

Me too, It is a college question tho, I am dual enrolled in Valencia college and they threw this one at me

Answer 3

Well I'm in regular Chem not college

Answer 4

Thanks anyway!

Answer 5

I can help, it may take a while...I MAY be able to see how to do it

Answer 6

what is it asking for, specifically

Answer 7

See, all you have to really do, is take the mass of Hydrochloric Acid, and turn it into moles by molar mass, Do you know how to do that?

Answer 8

No I do not :(

Answer 9

@MasterOfTheDarkArts

Answer 10

ok, so what you have to do, is take the molar mass of Hydrogen and Add it to Chlorine, and I think that's= 1.01+35.45?

Answer 11

I have no idea, but my test is gonna tme out, could you show everything and then we could discuss it?

Answer 12

so, first of all, I messed up...but I figured out how to correct it.
we have to figure out the mass of gold first

Answer 13

and yes

Answer 14

Thank you!!

Answer 15

in what form do you want your answer (moles, grams, etc.)

Answer 16

g/mL?

Answer 17

@MasterOfTheDarkArts

Answer 18

243.37 g

Answer 19

can you show the steps?

Answer 20

ok, so you convert gold into grams
(3.2*3.8*2.8) * (19.3)
then convert it to moles
/196.97
then convert it to AuCl2
*2
then convert back to HCl
*1
then convert to grams
*35.45 + (x*1.01)
and that's it

Answer 21

Thank you!!

Answer 22

no problemo