Advertisements
Advertisements
Question
Calculate the number of molecules in 12.8g of sulphur dioxide gas. Take Avogadro's number as 6 x 1023.
[S = 32, 0 = 16 ]
Advertisements
Solution
Number of molecules in 12.8g of sulphur dioxide gas.
Molecular mass of SO2 = 64a.m.u .
So, 64g = 1 mole
12.8g = 12.8/ 64 = 0.2 mole
Now 1 mole of SO2 contains = 6 x 1023molecules
0 .2 mole of SO2 contains = 0 .2 x 6 x 1023
= 1.2 x 1023molecules.
APPEARS IN
RELATED QUESTIONS
Convert into mole.
12 g of oxygen gas
Convert into mole.
20 g of water
How many moles are represented by 100 g of glucose, C6H12O6 ? (C = 12 u, H = 1 u, O = 16 u)
Which of the following correctly represents 360 g of water ?
- 2 moles of H2O
- 20 moles of water
- 6.022 × 1023 molecules of water
- 1.2044 × 1025 molecules of water
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
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
What mass of ammonium nitrate should be heated to produce 8.96L of steam?
What mass of Ca will contain the same number of atoms as are present in 3.2 g of S?
Calculate the number of atoms in the following:
52 moles of He
Solid ammonium dichromate decomposes as:
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate the quantity in moles of (NH4)2Cr2O7.
