Awidow's peak is a v-shaped area of the hairline in the center of the forehead. the allele for having a widow's peak is dominant to the allele for not having a widow's peak. if two parents do not have widow's peaks, what is the probability that their child will have a widow's peak?

Which statement can best be concluded from the ideal gas law?

Which compound contain an iron with a 3+ charge

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.)