The blank solution used to calibrate the spectrophotometer is 10.0 mL of 0.2 M Fe (NO3) 3 diluted to 25.0 mL with 0.1 M HNO3. Why is this solution preferred to simply using de-ionized water for the calibration?

The nucleus of an atom is a. the central core and is composed of protons and neutrons. b. positively charged and has more protons than neutrons. C. negatively charged and has a high density. d. negatively charged and has a low density.

An empty beaker weighs 34.06g. When it is completely filled with water, the beaker weighs 66.79. What is the volume that the beaker can contain?

F (x) = ax³ + bx² + cx + d, where a, b, c and d are integers. Given that f (0) = 6 (a) show that d=6 When f (x) is divided by (x - 1) the remainder is - 6 When f (x) is divided by (x + 1) the remainder is 12 (6) Find the value of b.

Imagine that the reaction 2 CO (g) + O2 (g) - -> 2 CO2 (g) occurs in a container that has a piston that moves to maintain a constant pressure when the reaction occurs at constant temperature.

Predict how many grams of KCI is produced from 40 grams of K?

A particular brand of gasoline has a density of 0.737 g/mL at 25 ∘ C. How many grams of this gasoline would fill a 12.8 gal tank (1US gal=3.78L) ?

A pump contains 0.5 l of air at 203 kpa. you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of air in the pump? 0.2 l 1.0 l 2.0 l 4.0 l

How can there be snow near a giraffe's home This is actually science so yeah

If a sealed syringe that contains some gas in heated in which direction will the syringe plunger move

Use the drop‑down menus to label the statements as either true of false. Dichloromethane is flammable. true false Methanol is flammable. Concentrated sulfuric acid is corrosive. 10% sodium carbonate solution must be used in the fume hood.