List of top Chemistry Questions on Mole concept and Molar Masses asked in MHT CET

Calculate the number of \( \text{Ca}^{2+} \) ion in 222 g anhydrous calcium chloride? (At. Mass Ca = 40, Cl = 35.5)
Find out the total number of electrons present in 3.2 g methane?
Calculate number of molecules present in 5.4 g of urea (Molar mass of urea $=60~g~mol^{-1}$)
A solution contains 10 g of NaOH dissolved in 500 mL of water. What is the molarity of the NaOH solution?
Calculate the mass in kg of 4.48 dm$^3$ carbon dioxide at STP.

Calculate the number of moles present in 9.10 × 1016 kg of water.

Total pressure of the solution is 500, the partial pressure of component A is 400, and the partial pressure of component B is 575. What is the mole fraction of component B?
What is the molar mass of the third member of the homologous series if the molar mass of the first member is 46 g?
Volume of a gas at NTP is \( 1.12 \times 10^{-7} \, \text{cm}^3 \). The number of molecules in it is:
What is the mass of 33.6 dm$^3$ of methane gas at S.T.P.?
How many molecules of ammonia gas are present in 67.2 $\text{dm}^3$, measured at S.T.P.?
How many molecules are present in $22400\ \mathrm{cm^3}$ of a gas at STP?