What's the definition of a mole?lindi said:Homework Statement
In the balloon with volume 4 liters, is 1 gram of hydrogen. How molecules of this gas as found in 1cm3, if the molar mass of hydrogen is 2g/mol?
Homework Equations
pV=nRT
The Attempt at a Solution
in my book the solution final is 7.5*10^19 molecules/cm^3
The number of molecules can be calculated using Avogadro's number, which is equal to 6.022 x 10^23 molecules per mole. This number is a constant and is used to convert from moles to molecules.
In order to find the number of molecules, you will need to know the number of moles of the substance. This can be determined using the mass of the substance and its molar mass, which can be found on the periodic table.
Yes, the number of molecules of a gas can be calculated using the Ideal Gas Law, which states that PV=nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
The number of molecules is directly proportional to the volume of a substance. This means that as the volume increases, the number of molecules also increases, and vice versa.
Yes, the number of molecules can be determined in a chemical reaction by using the coefficients in a balanced chemical equation. The coefficients represent the molar ratio between the reactants and products, which can be used to calculate the number of molecules involved in the reaction.