Which of the following is not an example of a pure element?

ar
co,2
o,2

What energy is it when you flip on a switch on a lamp

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.

Which of the following is the molecular formula for a simple sugar? a. cooh b. h2o c. oh d. c6h12o6