Many elements that are essential for life, including nitrogen, oxygen, and carbon, are part of what classification?

A. Metalloids

B. metals

C. noble gases

D. nonmetals

To what pressure would you have to compress 48.0 L of oxygen gas at 99.3 kPa in order to reduce its vol- ume to 16.0 L?

What are the missing coefficients for the skeleton equation below? Na2SO4 + KOH (aq) - - > NaOH + K2SO4 (aq) Question options: 2, 12, 4, 6 4, 6, 2, 3 1, 6, 2, 3 1, 2, 2, 1

An electrical motor converts electrical energy to potential energy True or false?

All the following are signs of a chemical reaction, except A. a change in color or odor. B. a release of gas. C. a change of state. D. a change in energy.

How many isotopes does argon have?

Which of the following statements is true? A. Particles of a solid have a very orderly, three dimensional arrangement and do not move B. Particles of a liquid change shape and volume C.

How does hess's law use intermediate reactions to calculate the enthalpy of a desired reaction?

Which atomic particle dtermines the chemical behaviour of an atom?

If you could travel to the Sun and back, about how far would you travel? A. 1 AU B. 2 AU C. 5 AU D. 10 AU

A scientist is conducting a descriptive experiment where she is monitoring sea level along coastal towns in California. What is a major benefit of this experiment? The relationship shows cause and effect. It is repeatable.