498calories equals how many kJ

What is the molarity of a solution containing 2 moles of HCl (hydrochloric acid) in 3 liters of water?

What is the common name of CuCO3

Test your knowledge of water's ability to dissolve substances by matching the following statements with the correct answers, when water breaks apart an ionic compound into cations and anions: when water surrounds substances that have been "broken

which of the following is a composite of a gas and a solid? A.) an apple B.) sediment moving in a river C.) water vapor in the air in a hot shower D.) packing bubbles with air trapped inside them

Tow formulas for compounds containing hydrogen and oxygen are H2O and H2O2. Do these formulas represent the same compounds? Explain

Suppose the diver at the top of a 9 m high platform has a mass of 50.0 kg. Calculate her potential energy relative to the ground. Answer in Joules.

A typical hydrogen peroxide solution from a drug store is labeled as 3.0% hydrogen peroxide. what is the other 97% of this solution?

The pressure of an enclosed gas depends on

What is one way to speed up a chemical reaction without otherwise affecting the reaction? a. add a catalyst b. decrease surface area c. change the products d. change the reactants

Why is halleys comet part of our solar system?