Asample of a hydrocarbon contains 20.75 g c and 4.25 g h. its molar mass is 58.04 g/mol. what is its empirical formula c2h5 ch2 ch c5h

Answer : The empirical formula is,

Solution : Given,

Mass of C = 20.75 g

Mass of H = 4.25 g

Molar mass of C = 12 g/mole

Molar mass of H = 1 g/mole

Step 1 : convert given masses into moles.

Moles of C =

Moles of H =

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C =

For H =

The ratio of C : H = 1 : 2.5

In the whole number the ratio of C : H = 2 : 5

The mole ratio of the element is represented by subscripts in empirical formula.

Therefore, the empirical formula is,

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but