8 Un campione d'acqua (d=1 g/cm?) si trova in un cilindro di raggio 0,1 m e altezza 0,2 m.
Qual è la sua massa (in kg)?

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?

Which describes interactions between substances and stomata during photosynthesis? check all that apply. oxygen enters stomata. oxygen is released through stomata. carbon dioxide enters stomata. carbon dioxide is released through stomata. hydrogen enters stomata. hydrogen is released through stomata.

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?