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?

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Find the mass in grams of 1.37x1020 particles of h3po4

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n