Question

Which of the following is wrong for 1 mole of substance?
1 mole of different substances contains different number of molecules.
1 mole of gaseous substace occupies 22.7 Lit volume at STP
It is molecular weight expressed in gram.
it contais 6.022 x 1023 (avogadro's number) of molecules.​

Answer 1

Answer:

avagadros number

Explanation:

Avogadro's number is an absolute number: there are 6.022×1023 elementary entities ... The mass of one mole of a substance is equal to that substance's molecular weight. ... is 18.015 atomic mass units (amu), so one mole of water weight 18.015 grams. ... to the number of atoms or molecules, regardless of the type of gas.

Answer 2

Answer:

Explanation:

1.One mole (abbreviated mol) is equal to 6.022×1023 molecular entities (Avogadro's number), and each element has a different molar mass depending on the weight of 6.022×1023 of its atoms (1 mole).

2.The molar volume of a gas is the volume of one mole of a gas at STP. At STP, one mole (6.02 × 1023 representative particles) of any gas occupies a volume of 22.4 L (Figure below). A mole of any gas occupies 22.4 L at standard temperature and pressure (0°C and 1 atom).

3.The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.

4.A dozen molecules is 12 molecules. A gross of molecules is 144 molecules. Avogadro's number is 6.022×1023 molecules. With Avogadro's number, scientists can discuss and compare very large numbers, which is useful because substances in everyday quantities contain very large numbers of atoms and molecules.

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