3. gregory makes a sandwich using 20 grams of peanut butter, zo grams of jelly and sgrams of bread. what is the mass of the sandwich?

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How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

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.