Question

Given the reaction:
8Au + 3Pv4 -> 4Auv2Pv3
How many moles of Auv2Pv3 will be formed when 197 grams of Au reacts completely with Pv4?

Answer 1

find the amount of moles you have:
moles=mass/molar mass

then use the coefficients to find how many moles you can produce

Answer 2

when I do mass/molar mass i get 0.396, I don't understand the second part

Answer 3

so you have:
8Au + 3P4 -> 4Au2P3
0.396 moles

notice that for every 8 of Au you use, you make 4 of the product

\[\frac{ 0.396 moles}{ 8 Au }=\frac{ x moles }{ 4 }\]

solve for x = 0.198 moles

so you can make that many moles of you product (assuming you have unlimited amounts of P)

Answer 4

Okay thanks again:)!

Answer 5

would we cross multiply the equation to get 0.198?

Answer 6

yes, isolate x, multiply both sides by 4

Answer 7

no prob !