Answer:
Modal means the one that occurs most often (averages: mode). In maths, the mode is one of the most common ways to describe a set of data. ... The modal class is, therefore, the group with the highest frequency.
Answer:
Sulfuric acid
Explanation:
Acid strength (in water) is measured as the equilibria of dissociation of the acid into hydronium and its conjugated base. The greater the Ka value, greater the acid strength.
This equilibrium constant is denominated Ka where [H+] stands for the molar concentration of hydronium and [HA] stands for the molar concentration of the non-dissociated acid.
The Ka values for these acids are: for HClO2; for HF; for HBO3; for H2SO3 and for H2SO4
So, as the greatest Ka is from H2SO4 it is the strongest acid in this list.
Answer:
6
Explanation:
The atom number 6 is the carbon. To calculate the number of neutron you need to substract the atomic weight and the number of the atom. The weight is 12 and the number is 6 so 12-6 equal 6 equal to the number of proton
The formation of nitric acid from nitrogen, hydrogen, and oxygen can be written as,
N₂ + H₂ + 3O₂ --> 2HNO₃
The net enthalpy of formation of nitric acid is calculated by,
Hrxn = Hproduct - Hreactant
Since all the reactants are in their elemental forms, the simplified equation would be,
Hrxn = Hproduct
Substituting,
Hrxn = (-186.81 kJ/mol)(2 mols)
<em>Answer: -372.42 kJ</em>