Democritus thought that matter was made of tiny particles .

that were built from earth, air, fire, and water

that could not be divided

that contained smaller structures

that were all round and smooth

What must happen before a body cell can begin mitotic cell division

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.)

Aman applies a force of 500n to push a truck 100m down the street how much does he do?