Which phrase describes air density?

increases as altitude increases

equals mass divided by volume

pushes molecules in one direction

exerts less pressure as it increases

What happens when the compound NaCl is formed? A. Sodium transfers an electron to chlorine. B. Sodium receives two electrons from chlorine. C. Sodium forms an ion with - 1 charge and chlorine forms an ion with + 1 charge. D.

One 100 g sample comprised of molecule (A) is made up of 57.1 g of oxygen and 42.9 g of carbon. Another 100 g sample comprised of molecule (B) is made up of 72.7 g oxygen and 27.3 g carbon.

In the following reaction 8 grams of ethane are burned and 11 grams of CO2 are collected. What is the percent yield? 2C2H6+7O2 = 4CO2 + 6H2O

The isomers butane and methylpropane differ in their 1) mo; ecular formulas 2) structural formulas 3) total number of atoms per molecule 4) total number of bonds per molecule

What is the charge of a potassium (K) ion? The Periodic Table A. - 1 B. + 1 C. + 4 D. - 4

Which of the following elements has its highest energy electrons in an "s" atomic orbital? radiium (Ra) neon (Ne) aluminum (Al) lanthanum (La)

About how long does it take for the Sun to make one rotation on its axis?

Does a physical change affect the identity of a substance

If the cost of electricity is 8 cents/kWh, how much will it cost to use the light for a whole year (365 days) ?

Place the object into the graduate cylinder and record the new volume of water