How much mass (in gram units) is represented by the following ?
0.2 mol of NH₃

Calculate the Formula Weights of the following compounds.C₆H₁₂O₆ - Glucose

Calculate the Formula Weights of the following compounds. NaOH

Calculate Equivalent mass of the Phosphorous acid

Calculate the molar volume of the following 460g of formic acid

Define the following:
(i) Element
(ii) Compound.

Calculate the number of atoms / molecules present in the following 1.8 gram of water

Explain about the classification of matter.

What is decomposition reaction? Give two examples.

How much volume of chlorine is required to form 11.2 L of HCI at 273 K and 1 atm pressure?

State and explain pauli exclusion principle.

Explain briefly the time independent schrodinger wave equation?

The quantum mechanical treatment of the hydrogen atom gives the energy value:
\({ E }_{ n }=\frac { -13.6 }{ { n }_{ 2 } } ev{ \ atom }^{ -1 }\)
(i) use this expression to find ΔE between n = 3 and n = 4
(ii) Calculate the wavelength corresponding to the above transition.

How many unpaired electrons are present in the ground state of Fe³⁺ (z = 26), Mn²⁺(z = 25) and argon (z = 18)?

Which ion has the stable electronic configuration? Ni²⁺ or Fe³⁺.