Calculate the pH and concentrations of CH3NH2 and CH3NH+3 in a 0.0263 M methylamine (CH3NH2) solution. The b of CH3NH2 is 4.47×10−4.

The melting point of sulfur is 115 °c and its boiling point is 445 °c. what state would sulfur be in at 200 °c?

Displacement is the slope of a velocity vs. time graph a. true b. false

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.