What must be known to find an object's average speed? *direction and time
*distance and time
*displacement and direction

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

Which states of matter have particles that move independently of one another with very little attraction?

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.