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 big bang theory suggests that our universe formed approximately years ago.

Molecular scientists can read the DNA code and compare the DNA of different organisms. This concept is used in molecular clocks to determine which of the following? Morphological relationships Geographic origin Evolutionary relationships

How many atoms are in 0.8288 grams of sodium, Na? 1.670 x 10^25 atoms 1.147 x 10^25 atoms 2.170 x 10^22 atoms 3.159 x 10^22

What functional group contains a nitrogen atom and an oxygen atom

If the manometer reading is 305 mm and the atmospheric pressure is 1.03 atm, what is the pressure of the gas in the flask?

Crude oil may contain hundreds of different types of hydrocarbons. Some examples include: Butane (C4H10) Dodecane (C12H26) Octane (C8H18) Benzene (C6H6) Many common fuels, such as gasoline and kerosene, are combinations of these substances or others.

What will happen if the concentration of water inside a cell is higher than the concentration of water outside a cell?

During a lab, you heat 1.04 g of a niso4 hydrate over a bunsen burner. after heating, the final mass of the dehydrated compound is 0.61 g. determine the formula of the hydrate and also give the full name of the hydrate.

Which molecule is a source of energy, a store of energy, and can mix with water?

How many atoms will you find in 2.0 moles of he?