How many atoms of Oxygen are in 30.72x10^-24 g of C4H9O3?

Round to the hundredths.

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat