Advertisements
Advertisements
प्रश्न
Find the number of molecules in 73 g of HCl.
Advertisements
उत्तर
HCl molecular mass = 1 + 35.5 = 36.5 g
36.5 g of HCl = 6.03 × 1023 molecules
∴ 73 g of molecules = `(6.03 xx 10^(23))/36.5 xx 73`
= 12.06 × 1023
= 1.2 × 1024
संबंधित प्रश्न
How many moles of oxygen atoms are present in one mole of the following compounds ?
- Al2O3
- CO2
- Cl2O7
- H2SO4
- Al2(SO4)3
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.
Consider the following reaction and based on the reaction answer the questions that follow :
\[\ce{(NH4)2Cr2O7 ->[heat] N2(g) + 4H2O(g) + Cr2O3}\]
Calculate :
(i) The quantity in moles of (NH4)2Cr2O7 if 63 gm of (NH4)2Cr2O7 is heated.
(ii) The quantity in moles of nitrogen formed.
(iii) The volume in litres or dm3 of N2evolved at STP.
(iv) The mass in grams of Cr2O3 formed at the same time
[Atomic masses : H = 1, Cr=52, N=14]
Calculate the number of gram atoms in 4.6 grams of sodium (Na = 23)
How many grams of Al are present in 0.2 mole of it?
How many grams of CO2 is present in 0.1 mole of it?
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)
What mass of Ca will contain the same number of atoms as are present in 3.2 g of S?
Four grams of caustic soda contains ______.
