How to tell how many solutions a system has khan academy?

Calculate the wavelength of an electron (m = 9.11 x 10-28 g) moving at 3.66 x 106 m/s. a. 1.99 x 10-10 m b. 5.03 x 10-10 m c. 1.81 x 10-10 m d. 5.52 x 10-9 m e. 2.76 x 10-9 m

Which solution has the highest concentration of salt? A. A pot of soup is 50 grams of salt per liter. B. The ocean contains 36 grams of salt in every liter. C. A 10-liter saltwater fish tank contains 360 grams of salt.

Calculate the mass of ascorbic acid in 2.82x10^-24 mol of ascorbic acid

What is the molar mass of butane, C4H10? Express your answer to two decimal places and include the appropriate units.

What is the mass in grams of ammonia gas in 1.204 x 10^24 molecules of ammonia gas, NH^3, at STP?

The surface of the earth is divided into more than 50 large plates

What is the net ionic equation for AgNO3 (aq) + K2SO3 (aq) ?

Oil and water a combined to make salad dressing. Physical Change? Chemical Change? Both?

How is water different from most liquids? It expands when it freezes. It contains chemical bonds. It has ionic and covalent bonds. It boils when it is heated.

In the thermal decomposition of copper carbonate, the black solid left behind weights less than the original copper carbonate. Why?