Question
Which of the following relation is
correct?Solution
The number of atoms of ANY substance in a volume is: # of atoms = N × (density) × volume / (Molecular Weight). N is a constant called Avogadro's number and its equal to 6.022×1023 atoms/mole. It can also be molecules per mole. Avogadro's number is a proportion that relates molar mass on an atomic scale to physical mass on a human scale. Avogadro's number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022 × 1023 mol-1 and is expressed as the symbol NA.
In a mixture, nitrogen and HCL are present in a 4:1 ratio. After removing 25% of the mixture and replacing it with 'x' liters of HCL, the ratio of nitro...
Quantity of water in a 360 litres mixture (Milk + Water) is 80 litres less than the quantity of milk in it. Find the quantity of water to be mixed so t...
Quantity of water in a 500 litres mixture (Milk + Water) is 100 litres less than the quantity of milk in it. Find the quantity of water to be mixed so t...
450 litres of mixture ‘A’ contains milk and water in it. If mixture ‘A’ is mixed with 750 litres of mixture ‘B’ which contains water and sa...
Mixture ‘A’ contains 40% sugar in it while mixture ‘B’ contains 64% sugar in it. They are mixed together to get a 120 kg mixture that contains 4...
- Mixtures A and B have milk and water in ratio 3:5 and 2:3 respectively. 40 ml from A and 45 ml from B are mixed. Find the percentage of water in the final ...
In a mixture of 85 litres, the ratio of milk to water is 2 : 3. If this ratio is to be 1 : 3, then what is the quantity of water needed to be added?
- In a 120-litre chemical mixture, the chemicals A and B are in the ratio 5:7. How much of chemical A must be added to make the ratio 7:7 (i.e., equal amount...
A mixture consists of 50% water and 50% milk. 10 liters of the mixture is replaced with the same quantity of milk. If the final ratio of milk to water i...
- 48 grams of an alloy 'A' containing only gold, silver and copper in ratio 1:1:4 respectively is mixed with 30 grams of alloy 'B' which contains only silver...
