Question

1. a student following the procedure of this experiment obtained the following data for an unknown volatile liquid:

mass of flask, boiling stone, foil cap, and unknown after cooling, g: 83.350
mass of flask, boiling stone, and foil cap, g: 82.657
water bath temperature, °c: 95.0
barometric pressure, in. hg: 30.09
volume of flask, ml: 270
accepted molar mass of unknown, g mol⁻¹: 86.2
(a) calculate the mass of the unknown.
(b) express the water bath temperature in k.

Explanation:

Step1: Temperature conversion formula

The formula to convert Celsius to Kelvin is \(T(K)=T(^{\circ}C)+273.15\)

Step2: Substitute the value

Given \(T(^{\circ}C) = 95.0\), then \(T(K)=95.0 + 273.15\)
\(T(K)=368.15\)

Answer:

\(368.15\)