One mole of any gas occupies ______ ml at S.T.P.

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One mole of any gas occupies 22400 ml at S.T.P.

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Chapter 7: Atoms and Molecules - Evaluation [Page 103]

Chapter 7 Atoms and Molecules
Evaluation | Q II. 9. | Page 103

Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?

Calculate the molar mass of the following substance:

Hydrochloric acid, HCl

What is the mass of 0.5 mole of water molecules?

How many moles of calcium carbonate (CaCO₃) are present in 10 g of the substance ? (Ca = 40 u ; C = 12 u ; O = 16 u)

If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the mass of one atom of oxygen.

Deduce the number of molecules of the following compound in the given quantity.

32g oxygen

Define the term.

Molar volume

Find the number of molecules in 73 g of HCl.

How many grams of HCl are present in 0.1 mole of it?

Solid ammonium dichromate decomposes as:

\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]

If 63 g of ammonium dichromate decomposes. Calculate the quantity in moles of (NH₄)₂Cr₂O₇.