2. A worker synthesizes aspirin, C, H,O4, according to this chemical equation. If 12.66 g of CH.0, are reacted and 12.03 g of aspirin are isolated, what is the
percentage yield?
C, H,O, + C. H.03 → C. H.O. + HCH:02

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

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.

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘