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

What is the number of molecules in 2.125 g of ammonia?
What is average atomic mass of chlorine if its two isotopes \(\text{Cl}^{35}\) and \(\text{Cl}^{37}\) exists in relative abundance of \(75\%\) and \(25\%\) respectively ?
Chlorine has two isotopes \(\text{Cl}^{37}\) and \(\text{Cl}^{35}\) with percentage abundance of \(25\%\) and \(75\%\) respectively. Find average atomic mass of chlorine ?
What quantity of \(\text{H}_2\text{O}\) in gram is present in \(0.25\) mol of it?
Find the number of molecules present in 70 g dinitrogen.
How many moles of potassium chlorate are heated to produce \(11\cdot 2\) L oxygen at STP ?
Calculate the number of molecules present in 2.24 \(\text{dm}^3\) of carbon dioxide at STP ?
The ratio of mass of 'x' atoms of an element to mass of carbon atoms is 9:1. Find the mass of 1 mol of x if molar mass of carbon is 12 g/mol.
Calculate the amount of aluminium present in \(\text{Al}_2(\text{SO}_4)_3\) if the compound contains 4 g of sulfur.
[Molar mass of sulfur = 32 g/mol , Molar mass of Al =27 g/mol ]
\(1\) g of \(\text{H}_2\) contains the same number of molecules as in
Which of the following contains maximum number of molecules?
Calculate the volume of \(99\) g of \(\text{CO}_2\) at STP ?
Calculate the mass of \(100\) molecules of oxygen in amu and in grams.
Find out the total number of electrons present in 3.2 g methane?
Calculate the mass in kg of 4.48 dm$^3$ carbon dioxide at STP.
A solution contains 10 g of NaOH dissolved in 500 mL of water. What is the molarity of the NaOH solution?
Calculate the number of \( \text{Ca}^{2+} \) ion in 222 g anhydrous calcium chloride? (At. Mass Ca = 40, Cl = 35.5)
Calculate number of molecules present in 5.4 g of urea (Molar mass of urea $=60~g~mol^{-1}$)

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?