Which of the following describe objects in free fall? Check all that apply. A. An apple falling from a tree B. A dog that is running C. A rock that is dropped D. A bee that is flying

The density of ethyl alcohol (200 proof, or pure alcohol) is 0.789 g/ml at 20°c. calculate the mass of a 27.1 ml sample. enter your answer in the provided box.

What common carboxylic acid does vinegar contain? acetic acid citric acid hydrochloric acid nitric acid

For which of the following is heat energy released? Evaporation Melting Condensing Boiling I know its either A or D

Why does a solution of a weak base and its conjugate acid act as a better buffer than does a solution?

The attraction of positive and negative charges is a a. physical bond c. chemical bond b. electron bond d. negative bond

A certain indicator has a color chart that shows that when the indicator is yellow, the solution is acidic. What is true about a solution that produces a yellow indicator?

The element hydrogen adom is made up of wich kinds of adams

What type of igneous rock contains large mineral crystals? Explain why.

Why does it require creativity to devise a new atomic model? The atom cannot be seen directly, so scientist must use creativity to interpret information about its structure. It is impossible to test a theory about the atom.

What will be the the net ionic equations for the following ones: - a) AgNO3 + KCl b) Ni (NO3) 2 + Na2S c) CaCl2 + Na2CO3.