Nitrogen using Lord Rayleigh's experiment was determined from denser air and from chemicals. The average mass of gas from air was found to have 2.310 (+-0.000143) g for 7 measurements. The mass of gas from chemical sources is 2.29947 (+-0.00138) g from 8 measurements. The spooled from the analysis altogether was calculated to be 0.00102 g. Is the nitrogen from air denser than the mtogn from chemicals