Given the balanced equation representing a reaction:
4nh3 + 5o2 ==> 4no + 6h2o
what is the minimum number of moles of o2 that are needed to completely react with 16 moles of nh3?
(1) 16 mol (3) 64 mol
(2) 20. mol (4) 80. mol

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate