How much copper would it take to give off

List four observations that indicate that a chemical reaction may be taking place

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.

When carbon disulfide is formed from its elements, heat is absorbed. calculate the amount of heat in (kj) absorbed when 5.66g of carbon disulfide is formed