What refers to the number of molecules in a given volume?

The equation is fairly simple. The number of atoms of ANY substance in a volume is: # of atoms = N * (density) * volume / (Molecular Weight). N is a constant called Avogadro’s number and its equal to 6.022*1023 atoms/mole. It can also be molecules per mole.

Consequently, what is the amount of substance in a given volume called?

Explanation: When a solute is dissolved in a solvent, it expresses a concentration . Typically, concentration = Amount of solute in molesVolume of solution in litres . And thus, typically, concentration has units of mol⋅L−1 ; this is typically called the molarity of the solution.

Also Know, how do you find the number of molecules from grams? A mass in grams numerically equal to the molecular weight contains one mole of molecules, which is known to be 6.02 x 10^23 (Avogadro’s number). So if you have x grams of a substance, and the molecular weight is y, then the number of moles n = x/y and the number of molecules = n multiplied by Avogadro’s number.

Also, how do you find the number of molecules in a gas?

To find the number of molecules in a gas sample, given the pressure, volume, and temperature of the sample:

  1. Figure out how many moles of CO2 gas you have.
  2. Use Avogadro’s number to convert moles into molecules: 0.0211915 mol × 6.02×1023 molecules/mol = 1.28 × 1022 molecules.

How many molecules are in a liter?

The atomic mass of water is 18 grams per mole. Therefore, one liter of water contains 1000 grams * (1 mole / 18 grams) = 55.56 moles of water. Because there are 6.022 * 10^23 molecules in a mole, the number of molecules of water in a liter is (6.022 * 10^23) * 55.56 = approximately 3.345 * 10^25 molecules of water.

Related Question Answers

New Post