1. How many moles of CuO are needed to react with 5.9 moles of CO2 2CuO-C--->2Cu+CO2

2. How many moles of Fe2O3 were used to produce with 11.5 moles of CO2
3Fe2O3+CO--->2Fe3O4+CO2

3.If 6.3 moles of CO2 were produced, how many moles of O2 were used?
CH4=202>CO2+2H2O

Please help.

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

Cucl2 + 2nano3 cu(no3)2 + 2nacl what is the percent yield of nacl if 31.0 g of cucl2 reacts with excess nano3 to produce 21.2 g of nacl? 49.7% 58.4% 63.6% 78.7%

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this