Some Basic Concepts of Chemistry

A decapeptide (Mol. Wt. 796) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine. Glycine contributes 47.0 % to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is

The volume (in mL) of 0.1 M $\ce{AgNO3}$ required for complete precipitation of chloride ions present in 30 mL of 0.01 M solution of $\ce{[Cr(H2O)5Cl]Cl2}$, as silver chloride is close to

A student performs a titration with different burettes and finds titre values of 25.2 mL, 25.25 mL, and 25.0 mL. The number of significant figures in the average titre value is

Silver (atomic weight = 108 g mol⁻¹) has a density of 10.5 g cm⁻³. The number of silver atoms on a surface of area $10^{-12}$ m² can be expressed in scientific notation as $y\times10^{x}$. The value of $x$ is

Given that the abundances of isotopes $^{54}$Fe, $^{56}$Fe and $^{57}$Fe are 5%, 90% and 5%, respectively, the atomic mass of Fe is

The total number of moles of chlorine gas evolved is

If the cathode is a Hg electrode, the maximum weight (g) of amalgam formed from this solution is