List of top Chemistry Questions on Mole concept and Molar Masses

0.1 mole of compound S will weigh ...... g, (given the molar mass in g mol$^{-1}$ C = 12, H = 1, O = 16)

Among $ 10^{-10} $ g (each) of the following elements, which one will have the highest number of atoms?
Element : Pb, Po, Pr and Pt

The molar mass of the water insoluble product formed from the fusion of chromite ore $FeCr_2\text{O}_4$ with $Na_2\text{CO}_3$ in presence of $O_2$ is ....... g mol$^{-1}$:

2.8 $ \times 10^{-3} $ mol of $ \text{CO}_2 $ is left after removing $ 10^{21} $ molecules from its ‘$ x $’ mg sample. The mass of $ \text{CO}_2 $ taken initially is: Given: $ N_A = 6.02 \times 10^{23} \, \text{mol}^{-1} $

0.1 mol of the following given antiviral compound (P) will weigh .........x $ 10^{-1} $ g.

What is the molar mass of NaCl?

What is the number of moles in 18 g of water ($ \text{H}_2\text{O} $)?

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} $)

Match List-I with List-II \[ \begin{array}{|l|l|l|} \hline \textbf{List-I} & \textbf{List-II} & \textbf{Matches} \\ \hline (A) \; \text{Cell constant} & (I) \; \text{cm}^{-1} & (A) - (I) \\ \hline (B) \; \text{Molar conductance} & (II) \; \Omega^{-1}\,\text{cm}^2\,\text{mol}^{-1} & (B) - (II) \\ \hline (C) \; \text{Specific conductance} & (III) \; \Omega^{-1}\,\text{cm}^{-1} & (C) - (III) \\ \hline (D) \; \text{Conductance} & (IV) \; \Omega^{-1} & (D) - (IV) \\ \hline \end{array} \]

The carbohydrate used as a storage molecule in plants is

Calculate the molality of KI if the density of 20% (mass/mass) aqueous solution of KI is (1)202 g mL$^{-1}$.
(Molar mass of KI is 166 g mol$^{-1}$)

The following solutions were prepared by dissolving 1 g of solute in 1 L of the solution. Arrange the following solutions in decreasing order of their molarity: (A) Glucose (molar mass = 180 g mol$^{-1}$)
(B) NaOH (molar mass = 40 g mol$^{-1}$)
(C) NaCl (molar mass = 58.5 g mol$^{-1}$)
(D) KCl (molar mass = 7(4)5 g mol$^{-1}$)

A solution of urea is 6% by mass. Calculate the mole fractions of urea and water in the solution. (Molecular mass of urea = 60).

The concentration of 0.2 M H$_2$SO$_4$ solution will be in g/L –

54% (w/w) water is present in the mixture of ethyl alcohol and water. Calculate the mole fraction of ethyl alcohol and water in the mixture.

The amount of Na$_2$CO$_3$ to prepare 500 ml 0.2 M solution is –

Explain molarity and molality by example.

28 g KOH (molar mass = 56) is dissolved in 500 mL solution. Calculate the molarity of the solution.

The concentration of solute in a solution is 3.5 ppm. By which of the following it may be expressed?

In a solution 30 mass percent of benzene is dissolved in carbon tetrachloride. Calculate mole fraction of benzene.

Calculate molality of a solution of 5.0 g of ethanoic acid (CH}_3\textbf{COOH) in 150.0 g of benzene.

The molar conductivities at infinite dilution for Na₂SO₄, K₂SO₄, KCl, HCl, and HCOONa at 300 K are 260, 308, 150, 426, and 105 S·cm²·mol⁻¹, respectively. What will be the molar conductivity at infinite dilution (Λ⁰) for formic acid in the same unit?

The number of atoms in 0.1 mole of a triatomic gas will be (NA = $ 6.02 \times 10^{23} $):

Which option has the greatest mass?