Chapter 1 – Basic Concepts of Chemistry
Assignment
Q.1. The cost of table salt (NaCl) is ₹ 12 per kg. Calculate cost per mole.
Q.2. How many electrons are present in 16 g of CH4?
Q.3. Calculate the number of grams of oxygen in 0.10 mol of Na2CO3.10H2O.
Q.4. Calculate the weight of carbon monoxide having same number of oxygen atoms as are present in 88 g of carbon dioxide.
Q.5. If atomic mass of carbon was taken as 100 u, then what would be the value of Avogadro's number?
Q.6. A 0.005 cm thick coating of copper is deposited on a plate of 0.5 m2 total area. Calculate the number of copper atoms deposited on the plate (density of copper = 7.2 g cm–3, atomic mass = 63.5).
Q.7. Calculate the number of molecules present in a spherical drop of water having a radius 1 mm if density of water is 1 g cm–3.
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