The d string on a violin has a frequency of 293 Hz when it is tune. Calculate the period.

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

What is the temperature of one mole of helium gas at stp?

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.