10 moles of oxygen divides and enters two reactors flow rate 45 kg/s and leaves the reactors at the flow rates of 6 kg/s and 9 kg/s, what are number of moles of oxygen that leaves the reactor with 9 kg/s?

Moles, Density & Concentration topics include: Concepts of mole, density, specific gravity, flow rate and mass fraction. A mole is a unit of measurement for the amount of a substance. It is a base unit in the International System of Units (SI).  One mole contains 6.02214076×10²³ elementary entities, which can be atoms, molecules, ions, or other particles. This number is called the Avogadro number.  Chemists use moles to measure very small things like atoms, molecules, or other particles. For example, a mole of water contains Avogadro's number of H2O molecules. However, each water... Show more

Moles, Density & Concentration topics include: Concepts of mole, density, specific gravity, flow rate and mass fraction.

A mole is a unit of measurement for the amount of a substance. It is a base unit in the International System of Units (SI). 

One mole contains 6.02214076×10^²³ elementary entities, which can be atoms, molecules, ions, or other particles. This number is called the Avogadro number. 

Chemists use moles to measure very small things like atoms, molecules, or other particles. For example, a mole of water contains Avogadro's number of H2O molecules. However, each water molecule contains 2 hydrogen atoms and one oxygen atom. Therefore, one mole of H2O contains 2 moles of hydrogen and one mole of oxygen. 
Moles are especially useful when writing chemical equations, because it lets us compare the ratio in which particles react rather than ratio of masses.

Concentration is the amount of a constituent in a mixture divided by the total volume of the mixture. Concentration can refer to any chemical mixture, but it most often refers to solvents and solutes in solutions. 
Molar concentration, also known as amount concentration, substance concentration, or molarity, is a measure of how much of a chemical species or solute is in a given volume. The equation for molar concentration is n = cV, where n is the amount of solute in moles, c is the molar concentration, and V is the volume of the solution in liters. 

The density of a substance is its mass per unit volume. The concentration of a solution is directly related to its density. As concentration increases, density increases proportionally. 

The equation for moles is moles = mass/Mr. The equation for concentration is concentration = moles/volume.

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