To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance. You will obtain a standard iron solution containing[ 0.2500g/L] of pure iron. Pipet 25.00mL of this standard iron solution into a 500mL volumetric flask and dilute up to the mark with distilled water. Finally, you will pipet certain amounts of this diluted solution into different flasks.

How much of this diluted solution do you need to pipet to have 0.00mg of iron?

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

Categorize them by metal, nonmetal, in periodic tableductilenon-ductilemalleableoft en gain electrons easilygood conductorpoor conductorcan be liquidselements

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.)