2. Which quantity represents the greatest number of molecules in a sample of fluorine gas at STP?' one mole
33.6 L
6.02*10^23molecules
38g

The right answer is 33.6L but I thought 33.6 L converted to mole is 1.5 while 38g converted to moles is 2

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)