DPP -11C12

MOLE CONCEPT

Q1. 12.044 × 10²³ molecules of 𝐶𝑂₂ at STP. Find

(i) mass of the sample given

(ii) Number of moles of CO₂

(iii) Volume of CO₂ in L at STP

(iv) Number of ‘O’ atoms.

(v) Number of ‘C’ atoms.

Q2. An atom of ¹²𝐶. Find mass in grams.

Q3. 2560g of 𝑆₈ sulphur molecule. Find

(i) Number of molecule

(ii) Number of atom of sulphur.

Q4.  A sample of 684 g of 𝐶₁₂𝐻₂₂𝑂₁₁ is taken in china dish. Find

(i) Number of mole

(ii) Number of particles of each atom.

(iii) What will be the Number of molecules if the value is changed to 1026 g.

Q5. Chlorophyl contains 2.4 % of Mg (by mass). Find the Mg atoms in 100g chlorophyl.

Q6. Which have the largest number of atom? Explain.

(i) 1g of Li

(ii) 1g of Au (µ = 197)

(iii) 1g of Na

(iv) 1g of 𝐶𝑙₂