Which of the following indicates that an exothermic reaction has taken place?

A. a change in color

B. release of heat and/or light energy

C. cooling of the surroundings

D. absorption of heat by the reaction ... ?

Which of the following is a mixture? A. sugar B. water C. soil D. salt

Why did the use of steam during the industrial revolution lead to an interest in understanding the atom?

Describe the type and nature of the bonding that often occurs between two nonmetals

If water were a linear (not bent) molecule like co2, electrostatic interactions between water molecules would be much weaker. why?

How can the ph scale tell you if a substance is an acid a base or neutral?

Amalgam is an alloy that contains mercury and other metals. Which of these atoms would most likely form metallic bonds with mercury? Check all that apply. bromine copper hydrogen iodine silver tin

Which fossil fuel is the most widely consumed in the United States? A. petroleum B. natural gas C. peat D. coal

Why is the use of natural gas as a full becoming more common

A swimming-pool worker wants the pool's pH to be 7.2. She comes by to test the water and finds that the pH is 9.2. What should she do to correct this situation? A. Add water. B. Add base. C. Add acid. D. Do nothing.

What type of rock is sandstone