Which of these is a mixture?

A) salt water

B) calcium

C) Potassium

D) carbon dioxide

Suppose that 4.8 L of methane at a pressure of 790 Torr is transferred to a vessel of volume 3.9 L. What is the final pressure of methane if the change occurs at constant temperature? Answer in units of Torr.

Balance this equation C2H4 + O2 + CO2 + H2O

Which of these compounds is the ester formed from the reaction of propanoic acid (ch3ch2cooh) and ethanol (ch3ch2oh) ?

Which of the following chemical formula show an iconic compound

Newton's First Law of Motion means that it will take a force to start and stop an object in motion.

The weighted average atomic mass of an element depends upon the a. relative abundance of protons in the element b. mass and relative abundance of each isotope of that element c. mass and relative abundance of each neutron of that element d.

What part of an atom do we change for isotopes

The Safe Drinking Water Act (SDWA) sets a limit for mercury-a toxin to the central nervous system-at 0.002 mg/L. Water suppliers must periodically test their water to ensure that mercury levels do not exceed 0.002 mg/L.

The smallest unit of an element is a blank

How many sodium atoms will create an ionic bond with sulfur?