What is a compound?

a) a combination of two or more substances that are not chemically combined

b) a combination of two or more elements that are combined in a certain ratio

Water in the bloodstream dissolves - -

What is the wavelength of infrared radiation with a frequency of 3.85 x 10^12 Hz?

Which liquid, methanol or ethanol has the largest vapor pressure value at room temperature?

What are two lipids that store energy

A typical ice cube has a volume of about 16.0 cm3. Calculate the amount of energy needed to melt the ice cube. (Density of ice at 0.°C = 0.917 g/mL; molar enthalpy of fusion of ice = 6.009 kJ/mol; molar mass of H2O = 18.02 g/mol.)

A 0.239 gram sample of a gas in a 100-mL flask exerts a pressure of 603 mm Hg at 14 degrees Celsius. What is the gas?

Which of the following is true about a redox reaction? In a redox reaction, an electron is lost by the reducing agent. In a redox reaction an electron is lost by the oxidizing agent.

Is the equation above balanced? How do you know? Mg + 2HCl → MgCl2 + H2

What characteristics do atoms of carbon-12, carbon-13, and carbon-14 have in common?

Which of the following changes would decrease the rate at which a solid solute dissolves in a liquid solvent? A. Decreasing pressure B. Decreasing surface area C. Increasing rate of stirring D. Increasing temperature