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List of top Chemistry Questions on Mole concept and Molar Masses

The number of atoms in 0.1 mole of a triatomic gas will be (NA = \( 6.02 \times 10^{23} \)):
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?
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 moles present in 9.10 × 1016 kg of water.

Calculate the mass in kg of 4.48 dm$^3$ carbon dioxide at STP.
What is the molar mass of the third member of the homologous series if the molar mass of the first member is 46 g?
How many grams of $ \mathrm{Al_2(SO_4)_3} $ are required to produce 10 L of a 0.5 M solution? (Molar mass = 342 g/mol)
How many moles are present in $ 22\, \text{g} $ of carbon dioxide (CO$_2$)? (Molar mass of CO$_2$ = $ 44\, \text{g/mol} $)
What is the number of moles in 18 g of water (\( \text{H}_2\text{O} \))?
What is the molar mass of NaCl?
Volume of a gas at NTP is \( 1.12 \times 10^{-7} \, \text{cm}^3 \). The number of molecules in it is: