When did homo spiens leave africa

How many mold are in 4.25x10^-2 atoms of lead

Nuclear power produces more toxic mercury than coal-burning power plants do. True Or False?

What is the mass of a 3.00cm3 piece of gold having a density of 19.3g/cm3

Compare the compressibility of solids and liquids. Support your answer by describing the arrangement of particles in solids and liquids.

A 32 L samples of xenon gas at 10°C is expanded to 35 L. Calculate the final temperature.

Identify the missing numbers below to show the result of dividing the numbers 5.6 x 10^12 / 3.5 x 10^9 = A x 10^B

If you made 6 moles of NO2 How many grams of N2 did you use N2+2O2> 2NO2

At what temperature in Kelvin will 0.0965 moles of chlorine exert a pressure of 2.02 atm at a volume of 0.652 L?

How can a mixture of nails and sawdust be most efficiently separated into its component parts? A:By cooling it B:By filtering it C: By using a magnet D:By using a catalyst

A 10.0 L balloon contains helium gas at a pressure of 655 mmHg. What is the new pressure, in mm Hg, of the helium gas if the volume is 20.0 L and if there is no change in temperature or quantity? 6550 mmHg 1000 mm Hg 1310 mmHg 300 mm Hg