Describe what a mole is - - its value, its uses, the general concept.

Is waterproof sun lotion polar or no polar

You get a can of soda from the vending machine and your "friend" maliciously shakes it when you're not looking. You open the can of soda and it fizzes all over your desk, making you regret you had brought it to lab in the first place.

Nitrogen will react with hydrogen to form the compound ammonia. The compound formed has properties that are different from the elements that make it up. What has to occur in order for this compound to be formed?

Which of the following processes have a ΔS < 0? Group of answer choices carbon dioxide (g) → carbon dioxide (s) isopropyl alcohol condenses All of the above processes have a ΔS < 0. water freezes methanol (g, at 555 K) → methanol (g, at 400 K)

A reaction has? h? rxn = - 129 kj and? s? rxn = 301 j/k.

A. 5 kg pizza is sitting on a kitchen counter 1.5 m high. How much potential energy does the pizza have?

Which statements are true? Check all that apply. A. If heat is added to a substance, the temperature increases unless there is a phase change. B. As heat is added to a substance, the temperature stays constant or goes down. C.

What is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants are in the aqueous or liquid phase?

A gas in a container with a fixed volume was originally at a pressure of 316 kPa and a temperature of 154 K What is the new pressure in atm if the temperature is increased to 235 K?

How many moles are in 233 grams of MgSiO3