Advertisements
Advertisements
प्रश्न
What do you understand by the term mole? How many elementary units are in one mole of a substance?
Advertisements
उत्तर
"A mole is defined as the amount (mass) of a substance containing elementary particles like atoms, molecules or ions equal to Avogadro's number i .e. 6.023 x 1023.
Or a collect ion of 6.023 x 1023 particles is called mole.
Number of elementary uni ts present in one mole of a substance is 6.023 x 1023.
APPEARS IN
संबंधित प्रश्न
What is the mass of 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
Convert into mole.
12 g of oxygen gas
If the aluminium salt of an anion X is Al2X3, what is the valency of X ? What will be the formula of the magnesium salt of X ?
What is a group of 6.022 × 1023 particles known as ?
A student puts his signature with graphite pencil. If the mass of carbon in the signature is 10-12 g. Calculate the number of carbon atoms in the signature.
A flask contains 3.2g of sulphur dioxide.Calculate the following : The moles of sulphur dioxide present in the flask.
Complete the following calculations. Show working for complete credit :
Calculate the mass of calcium that will contain the same number of atoms as are present in 3.2 gm of Sulphur. [Atomic masses : S = 32, Ca = 40]
Calculate the mass of 0.1 mole of the following:
CaCl2
(Ca = 40, Na=23, Mg =24, S=32, C = 12, Cl = 35.5, O=16, H=1)
Determine the number of molecules in a drop of water which weighs 0.09 g.
What is Molar volume of a gas?
