An experiment yields for 2.5 grams of product, but was expected to yield 10.0 grams. what is the percent yield?
a. 25%
b. 4.0%
c. 25.0%
d. 4%

Aaspirin has a density of 1.40 g/cm^3 what is the volume in cubic centimeters of a tablet weighing 320 mg?

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.