Suppose a small amount of lead(ii) chloride got into your ba(oh)2 sample before your titration, contaminating it. how do you think this contamination would affect your calculated concentration for the sample

Chemistry worksheet - i am not sure what they are asking for exactly?

How many valence electrons are in atom of radon?

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.