MIxing of sand in water is an example of formation of a substance with a different identity. The sand sinks to the bottom in this mixture that's why it is a heterogenous mixture. A heterogenous mixture is a mixture that is not uniform in composition and it includes different substances like solid and liquid mixture.
While other options are may be homogenous mixture and diluted solution which have same composition and may also have same phase like liquid to liquid and powder to powder.
This means for every number of Carbon (C) atoms, there are twice as many Hydrogen (H) atoms with an additional two added onto that.
Therefore, if there is one Carbon Atom, and we multiply that by two, and then add an additional two, we get 4 Hydrogen atoms, so CH4, which is our first Formulae
Secondly, if we have eight Carbon Atoms, and we multiple that by two (16), and then add an additional two, we get 18 Hydrogen atoms, so C8H18, which is our second Formulae
The other Formulas do not follow this 'General Formula'
Reactants break bonds with consuming the energy and form the new bonds .
Explanation:
As the two molecules interacted with each other , the elements reshuffled the bonds and formed the new ones with shifting the energy and converting it into new products .
Since KOH is a strong base, the solution completely ionizes into K+ and OH- when in water. The reaction KOH --> K+ + OH- takes place. The concentration of [ OH- ] can then be used to calculate the pOH of the solution. pH = 14 - pOH = 14 - 1.48 = 12.52
