Calculate the mass of perchloric acid, HClO₄ needed to prepare 3.45 molal perchloric acid solution using 100 mL volumetric flask.

Hydrocarbon E consists of 82.66% carbon and 17.34% hydrogen with a molar mass of 58.1 g/mol. Determine the molecular formula of E.

A solution of hydrochloric acid with 37.8% by mass of HCl has a density of 1.19 g/cm³. Calculate the molarity of concentrated hydrochloric acid.

Balance the redox equation in an acidic medium based on the given half equations. Determine the stoichiometry coefficient of H₂O.

MnO₄^- $$\rightarrow$$ Mn²⁺

C₂O₄^2- $$\rightarrow$$ CO₂

Hydrogen gas can be produced through the reaction between zinc and hydrochloric acid as follows:

Zn (s) + 2HCl (aq) $$\rightarrow$$ H₂ (g) + ZnCl₂ (aq)

If 13.0 g of zinc reacts with excess HCl, calculate the volume of hydrogen gas produced at room temperature in unit mL.

(Molar mass Zinc, Zn: 65.4 g/mol, Hydrogen, H: 1.0 g/mol, Chlorine, Cl: 35.5 g/mol)

Determine which molecule has dipole moment, μ = 0.

Choose the most plausible Lewis structure for CNO^-.

Arrange the following compounds in the order of increasing boiling point.

HF, HCl, Cl₂

The hybridization of the central atom in the following molecules is sp³ except

Deduce which of the following species has a see-saw shape.

pK_b values of four solutions are given in table given. Choose the most basic solution.

A 100 mL of 0.01 M solution of a monoprotic weak acid was used for titration. The pH value of the acid was 4.0. Determine the K_a of the acid.

Choose the statement that is NOT TRUE about buffer solutions.

Calculate the molar solubility of Ca(OH)₂ in water if the Ksp given is 6.5 x 10^-6.