A pair of 100mL samples of water are taken from a well bored into a large underground salt(NaCl) deposit. Sample #1 is from the top of the well, and is initially at 32. Sample #2 is from a depth of 50. M, and is initially at 42C. Both samples are allowed to come to room temperature (20. C) and 1atm pressure. An precipitate is seen to form in Sample #1.

Determine the reaction and balance the following equations urgent due in the morning

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.)

Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?