When the products of a reaction have more energy than the reactants:

the reaction is exothermic

the reaction is endothermic

the reactants gave up energy

the H is positive

Why does a liquid have a definite volume and a shape that can vary?

What does the pH of a solution measure? O A. Color O B. Volume O c. Temperature O D. Acidity

Which of the following atoms has the greatest tendency to attract electrons? (1) barium (3) boron (2) beryllium (4) bromine

Which of the following involve chemical changes? 1. a carrot being digested 2. a piece of wood burning 3. a piece of chocolate melting

A major disadvantage of a corporation is the a. difficulty in transferring ownership. b. limited life. c. difficulty in raising capital. d. double taxation of the corporation s income and of dividends paid to shareholders.

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.