Given: the mass of one N atom = 14 units the mass of one O atom = 16 units

c. What is the total mass of one molecule of NO? Show work.

d. What is the % by mass of N and O in NO? Show work.

e. Using to represent an atom of nitrogen and to represent an atom of oxygen, draw a molecule of NO2.

f. What is the ratio by mass of N to O in nitrogen dioxide, NO2?
(leave your answer as a ratio of whole numbers)

g. What is the total mass of one molecule of NO2 ? Show work.

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible?

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.