An organic compound has the molecular formula C8H16O4. What is the empirical formula of the compound?

C₂H₄O

Explanation:

Empirical formulas show the simplest ratio of atoms in a compound in whole numbers.

We can think that all the atoms are divisible by 4.

As we need the lowest number for each subscript, empirical formula is:

C₂H₄O

We have divided, 8/4 for carbon, 16/4 for H and 4/4 for O.

The empirical formula is also known as the simplest expression to represent a chemical

q = - 3.569KJ 0r 3.569KJ Liberated heat (signifying the change in heat is negative)

Explanation:

liberated heat implies that change in heat is negative , therefore

q = -m c ΔT

where, m = mass of the Silver = 249 g

c = specific heat capacity of Silver = 0.235 Jg^{-1} °C^{-1

 ΔT = change in temperature = 87°C- 26 °C= 61°C

q = -m x c x ΔT

= - 249 x 0.235 x 61 = - 3569.415J  rounded to -3569J

Changing to KJ becomes= -3569/1000= - 3.569 KJ

q = - 3.569KJ 0r 3.569KJ liberated heat.