Predict the mole fraction of b in the vapor produced when a mixture of 0.70 mole fraction of a and 0.30 mole fraction of b boils.

Which compound contains only nonpolar covalent bonds? O2 CO2 H2O NO3

A basketball is bounced from a height of 1.13 m above the ground. During its descent, it converts potential energy to kinetic energy. Assuming it started its descent from rest, what is its final velocity (in m/s) upon impact with the ground?

1. What is the frequency of light having a wavelength of 406 nm? 2. What is the wavelength (in nm) of radiation having a frequency of 2.09 * 109 Hz?

Give the number of significant figures: 3.10 cm

The system CO2 (g) + H2 (g) ⇀↽ H2O (g) + CO (g) is at equilibrium at some temperature. At equilibrium a 4.00 L vessel contains 1.00 mole CO2, 1.00 mole H2, 2.40 moles H2O, and 2.40 moles CO.

Heat is an exchange of internal energy from one system to another due to A. a temperature difference between the systems. B. one system being gas and the other being solid. C. the systems having the same temperature. D.

Sierra did 500 J of work to move her couch. If she exerts 250 N of force on the couch, how far did she move it? (Work: W = Fd) 0.5 m 2 m 250 m 750 m'

Lead (ii) sulfide (pbs) has a ksp of 3.0 * 10-28. what is the concentration of lead (ii) ions in a saturated solution of pbs? 1.7 * 10-14m 1.5 * 10-14m 3.0 * 10-14m

A 2.17 gm sample barium reacted completely with water what is the equation for the reaction how many milliliters of dry H2 evoled at 21degree celcius and 748mm of Hg?

What does it mean for data to be continuous?