Advertisements
Advertisements
प्रश्न
Deduce the number of molecules of the following compound in the given quantity.
32g oxygen
Advertisements
उत्तर
Number of moles in O2 = `("Mass of O"_2 "in grams")/"Molecular mass of O"_2`
= `32/32`
= 1 mole
∴ 1 mole of O2 contains 6.022 × 1023 molecules.
∴ The number of molecules in 32 grams of oxygen is 6.022 × 1023.
APPEARS IN
संबंधित प्रश्न
What is the mass of 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
What is the mass of 0.5 mole of water molecules?
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 ?
How many moles are 3.6 g of water ?
Fill in the following blanks :
0.5 mole of calcium element has a mass of ............... .
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
Define the term Relative atomic mass.
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.
Calculate the number of moles and number of molecules present in 1.4 g of ethylene gas. What is the volume occupied by the same amount of ethylene?
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
Determine the percentage of oxygen in the ammonium nitrate?
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?
How many grams of Al are present in 0.2 mole of it?
Calculate the mass of 0.1 mole of the following:
CaCO3
(Ca = 40, Na = 23, Mg = 24, S = 32, C = 12, Cl = 35.5, O = 16, H = 1)
Calculate the mass of 0.1 mole of the following:
Mg
(Ca = 40, Na = 23, Mg = 24, S = 32, C = 12, Cl = 35.5, O = 16, H = 1)
Cost of Sugar (C12H22 O11) is Rs 40 per kg; calculate its cost per mole.
Correct the statement, if required.
Under the same conditions of temperature and pressure, equal volumes of all gases contain the same number of atoms.
Calculate the number of moles in 7g of nitrogen.
How many grams are there in the following?
5 moles of sulphur molecule, S8
