One mole of CO₂ contains _______.

5.6 litres of oxygen at NTP is equivalent to _______.

12 g of Mg will react completely with an acid to give: _______.

The number of significant figures in 0.0101 is _______.

The mass of an atom of nitrogen is _______.

Calculate the mass of a sample of iron metal that contains 0.250 moles of iron atoms.

Calculate the mass of sodium acetate, CH₃COON required to make 500mL of 0.375 molar aqueous solution. Molar mass of sodium acetate is 82.0245 g mol^-1.

What is the concentration of sugar (C₂H₂₂O₁₁) in mol L^-1. if its 20 g are dissolved in enough water to make a final volume up to 2 L?

What will be the mass of one ¹²C atom in g?

Give an example of molecule in which the ratio of the molecular formula is six times the empirical formula.

\({ Fe }_{ 2 }({ SO }_{ 4 }{ ) }_{ 3 }\) is used in water and sewage treatment to aid the removal of suspended impurities. Calculate the mass percentage of iron and sulphur in this compound. 

If 500 ml of a 5M solution is diluted to 1500 mL, what will be the molarity of the solution obtained?

Express the following in SI unit. "100 mile per hour"

Why air is not always regarded as homogeneous mixture?

Express the following up to four significant figures. '8.721 x 10⁴'

Express the following up to four significant figures. '2000'

A lady purchases a ring from a jeweller with diamonds embedded into it. The jeweller tells that total diamond used in the ring is five carat. How much weight he should subtract from the weight of the ring to get the weight of gold?

The cost of table salt (NaCl) and table sugar (C₁₂H₂₂O₁₁) are Rs.1 per kg and Rs.6 per kg respectively. Calculate their cost per mole.