A chemist weighed out 19.9 g of aluminum. Calculate the number of moles of aluminum she weighed out.

What factors govern the position of an IR absorption peak? Select one or more correct answers. A. strength of the bond B. effect of a magnetic field on nucleus spin C. masses of the atoms involved in the bond D. the type of vibration being observed

How many molecules of benzene (C6H6) are in 17.4 g of benzene? (Show ALL work and answer with correct significant figures and units.)

Which are true statements? Check all that apply. A. Moles are counted in kilograms. B. A mole always weighs 6.02 * 1023 g. C. The mass of 1 mol is the same as the atomic mass in grams. D. Avogadro's number is 6.02 * 1023.

What volume of 0.6 m hcl is required to neutralize 100.0 ml of 0.5 m naoh?

A newborn eats 8 times a day. At each feeding, he eats 2.5 ounces of formula. How many days would it take to eat 100 ounces

What were three of the major complaints a bgainst the Church?

What is the solubility of a solid in a solvent?

Scientists have created an exact scale replica of a rover currently found on Mars and a miniature 3D landscape identical to that where the rover is currently located.

In order from lowest to highest frequency, list the different waves of the electromagnetic spectrum

You have prepared a saturated solution of x at 20∘c using 31.0 g of water. how much more solute can be dissolved if the temperature is increased to 30∘c? express your answer with the appropriate units.