A1.69 mol sample of krypton gas occupies a volume of ? l at stp.

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule

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.)