6) The specific heats of three different liquid substances are listed as: Carbon tetrachloride: 0.856 J/g °C
Benzene: 1.74J/g C Acetic Acid: 2.01 J/g C
5g of an
An experimenter found that 1.42 kJ of heat energy raised the temperature of 19.708
unknown liquid substance by 36.4°C. Identify the substance.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

c.

explanation:

the answer is b. dilution