Which of the following is not a symbol of an element?

a. Na

b. CO

c. S

d. He

A balloon contains 11.1 g of nitrogen monoxide gas (NO). how many molecules are in the balloon?

A very flammable substance would not be used in children's clothing.

6. A student was conducting an experiment to find the volume of a spherical metal object. He placed it in the graduated cylinder and found the volume to be 5ml.

What is the relationship between humidity and air pressure

Coal and petroleum are useful because the both have ___ stored in them. 1. energy 2. carbon 3. oxygen 4. carbon dioxide

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