The sodium atom contains 11 electrons, 11 protons, and 12 neutrons. what is the atomic mass of sodium?

It has been proposed that North America is moving west at about 2 cm per year. How many kilometers would it move in 5,000 years? (Note: 2 cm is a measurement, so apply significant figure rules in your final answer.)

If 0.5 mole of zn is added to hydrochloric acid containing 0.6 mol of hcl, which reactant is in excess

How is chemical sedimentary rock different from detrital sedimentary rock?

What is the ground state shorthand notation for manganese (Mn) ?

Aspirin, C9H8O4, has a molar mass of 180.2 g/mol. A tablet contains 325 mg (0.325 g) of pure aspirin. Show all work A. how many moles of aspirin are in one tablet B. How many moles of oxygen are in one tablet of aspirin C.

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.