Round 2675 to two significant figures.

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils