* What do you believe is the most important character quality a person should / what do you believe is the most important quality a person should/could have??? (examples of character
qualities: honesty, kindness, brave, cheerful, hard-working, friendly, funny, etc.)

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)