Advertisements
Advertisements
Question
Determine the number of molecules in a drop of water which weighs 0.09 g.
Advertisements
Solution
18 g of water has number of molecules = 6.02 x 1023
∴ 0.09 g of water will have no. of molecules = `(6.02 xx 10^23)/18 xx 9/100`
= 3.01 x 1021 molecules
APPEARS IN
RELATED QUESTIONS
Convert into mole.
22 g of carbon dioxide
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 ?
Fill in the following blanks :
A mole represents an .............. number of particles of a substance.
What is the mass of 5 moles of sodium carbonate (Na2CO3) ?
(Atomic masses : Na = 23 u ; C = 12 u ; O = 16 u)
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
Calculate the weight of one molecule of oxygen.
[Avogadro’s number = 6 × 1023, O = 16 ]
The equation for the burning of octane is:
\[\ce{2C8H18 + 25O2 -> 16CO2 + 18H2O}\]
How many moles of carbon dioxide are produced when one mole of octane burns?
Explain the term:
Molar volume
How many grams of CO2 is present in 0.1 mole of it?
The number of molecules in 4.25 g of ammonia is ______.
