Which of these is a mixture?

A. carbon

B. carbon dioxide

C. air

D. oxygen

Which atom in each pair has the larger atomic radius Li or K?

Determine the osmotic pressure of a solution that contains 0.048 g of a hydrocarbon solute (molar mass = 340 g/mol0

A warning label is required to provide set information. The following list contains only some of this required information.

What happens to the chemical energy of a lithium-ion battery as it is discharge to power a laptop computer? does it increase, decrease, or remain unchanged?

An alpha particle is the same as a helium-4 nucleus: it contains two protons and two neutrons in the nucleus. Given that the radius of an alpha particle is approximately 2.

A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound? A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?

A sample of an unknown compound was decomposed and found to be composed of 1.36 mol oxygen, 4.10 mol hydrogen, and 2.05 mol carbon.

When a transition metal reacts with chlorine, what types of bonds are formed between the two elements? A) ionic bonds B) covalent bonds C) transition bonds D) No bonds are formed.

How many grams of hcl are produced when 10.0 g of cl2 and 1.00 g of h2 react? h2 (g) cl2 (g) - - - > 2 hcl (g) ?

A person has a mass of 1000g and an acceleration of 20 m/s/s. What is the force on the person? A.) 20000 N B.) 2000N C.) 20N D.) 200N