Answer:
Below
Step-by-step explanation:
a) From the equation every 2 moles of (CuNo3)2 results in ONE mole of O2
starting with 5 moles you would get 2 1/2 moles of O2
each mole of O2 weighs ( 2 * 15.99) = 31.98 g ( from periodic table)
2 1/2 of these would weigh 79.95 g
b) each mole of Cu(NO3)2 produces the same number of moles of Cu O
how many moles of Cu (NO3)2 are in 87.49 g
again from periodic table Cu = 63.546 gm N = 14.007 O=15.999
total mole weight of Cu(No3)2 would then be 187.554 g
87.49 g / 187.554 g / mole = .466 moles the same amount of Cu O
c) Want to try this one yourself?