In an open system, the vapor pressure is equal to the outside air pressure.

T or F?

Helium is an inert gas that does not react with other substances to form compounds. Would it be correct to say that helium has no chemical properties?

Problems associated with biofuels include

You started with 64 g of a radioactive substance. If you have 4.0 g of that substance left, then how many half-lives have elapsed? a. 2 b. 3 c. 4 d. 5

How to do stoichiometry?

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethylene, H2C=CH2?

A gas obeys the ideal-gas equation of state P V = N k T, where N = n NA is the number of molecules in the volume V at pressure P and temperature T and n is the number of gm-moles of the gas.

76. Which of the following choices is not an example of an adaptation? A. Nocturnal animal species have large eyes. B. One member of a wolf litter is born with shorter legs than its siblings. C.

Which is more dense a pound of rice or a pond of cement

An essay that is 530 words over an experiment. EX. Coke vs Mento Invisible Ink

K2so4 is a strong electrolyte. determine the concentration of each of the individual ions in a 0.600 m k2so4 solution.