What is the molar mass of a sugar, if a solution of 1.4 g of the sugar in 0.20 L of solution has an osmotic pressure of 3.5 atm at 37âC? Use R=0.08206L atmmol K in your calculation.
Report your answer with two significant figures.

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

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.)

Which of these is a physical property