An ice wedge shattering a slab of shale

a
Chemical Change
b
Physical Change

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 of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

In which phase(s) do the molecules take the shape of the container?