Which formula is both a molecular and an empirical formula?
(1) c6h12o6 (3) c3h8o
(2) c2h4o2 (4) c4h8

Answer : The correct option is, (3)

Explanation :

Empirical formula : It is defined as the simplest or most reduced ratio of atoms in a compound.

Molecular formula : It is defined as the how many atoms of each element present in a compound.

From the given options, the option (3) formula represent both a molecular and an empirical formula.

From formula, we can determine the molecular formula by multiplying the whole numbers (1, 2, 3, 4 ....etc.)

While the other options, (1), (2) and (4) do not represent both a molecular and an empirical formula. Only represent the molecular formula.

The molecular formula of Glucose is, and the empirical formula will be,

The molecular formula of Ethanoic acid is, and the empirical formula will be,

The molecular formula of Butene is, and the empirical formula will be,

Hence, the formula represent both a molecular and an empirical formula is,

oh it is true if thats what you are asking

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j