What is Mole concept example?

What are the examples of mole?

For example, in the chemical reaction 2H2O → O2 + 2H2, two moles of water are decomposed into two moles of molecular hydrogen and one mole of molecular oxygen. The mole can be used to determine the simplest formula of a compound and to calculate the quantities involved in chemical reactions.

What is mole concept in short answer?

Mole is defined as the amount of the substance containing the same number of discrete entities (atoms, molecules, ions, etc) as there are atoms in a sample of pure 12C weighing exactly 12g. The number of particles present in one mole of any substance =Avogadro Number=6.

What is mole in chemistry class 11?

A mole can be defined as the amount of substance that contains the same number of chemical entities (atoms, ions, molecules, etc.) as there are in 12 g of Carbon-12 isotope, as defined by the General Conference on Weights and Measures.

What is mole Ncert?

1. The mole is the amount of substance of a. system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12; its symbol is “mol.” 2.

Why mole concept is important?

Explanation: THE mole is important because it allows chemist to work with a subatomic world with macro world units and amount. Atoms molecules and formula units are very small and very difficult to work with usually. However the mole allows a chemist to work with amount large enough to use.

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What is Formula mass explain with example?

The formula mass of a substance is the sum of atomic masses of the atoms present in the formula. … Therefore, NaCl is just the formula that is used to represent sodium chloride though it is not a molecule. In such compounds, the formula (i.e., NaCl) is used to calculate the formula mass instead of molecular mass.

What is the value of 1 mole?

The value of the mole is equal to the number of atoms in exactly 12 grams of pure carbon-12 (12 g C = 1 mol C atoms = 6.022 × 1023 C atoms).

How many moles of electrons weigh 1kg?

Or, 1 kg will contain = $dfrac{1}{{9.108 times 6.022}} times {10^8}$ moles of electrons. Thus, $dfrac{1}{{9.108 times 6.022}} times {10^8}$ moles of electrons will weigh one kilogram. So, the correct answer is “Option D”.

What is the easiest way to learn mole concept?

Mastering moles

  1. 1 Ensure students are totally comfortable with mol = mass/Mr
  2. 2 Start with empirical formulas. …
  3. 3 Lay out calculations properly. …
  4. 4 Investigate mole ratios in the lab. …
  5. 5 Get students to balance equations from mass data for reagents and products.