A chemist requires 3.0 liters of 0.12 M H2SO4 solution. How many grams of H. SO4 should the chemist dissolve in the water ?

Mass of H₂SO₄ = 35.31 g

Explanation:

Given data:

Volume of H₂SO₄ solution = 3.0 L

Molarity of solution = 0.12 M

Mass of H₂SO₄ = ?

Solution:

Formula:

Molarity = number of moles / volume of solution in L

Now we will put the values.

0.12 M = number of moles / 3.0 L

Number of moles = 0.12 M  × 3.0 L

Number of moles = 0.36 mol  ( M = mol/L)

Mass of H₂SO₄:

Mass of H₂SO₄ = number of moles × molar mass

Mass of H₂SO₄ = 0.36 mol  × 98.079 g/mol

Mass of H₂SO₄ = 35.31 g

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.