Agas mixture contains 4.5 mol br2 and 33.1 mol f2. (a) compute the mole fraction of br2 in the mixture. (b) the mixture is heated above 150°c and starts to react to give brf5: br2(g) 1 5 f2(g) 8n 2 brf5(g) at a certain point in the reaction, 2.2 mol brf5 is present. determine the mole fraction of br2 in the mixture at that point.

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude