Chemistry, 05.05.2020 05:30 naiomireyes74p2aybs
The molar mass of an unknown organic liquid (M ~ 100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates to expel the air and fill the flask with the unknown vapor at atmospheric pressure. After cooling to room temperature the flask and its contents are reweighed.
The uncertainty in which piece of apparatus causes the largest percentage error in the molar mass?
A) balance (+/-0.01 g)
B) barometer (+/-0.2 mm Hg)
C) flask (+/-1.0 mL)
D) thermometer (+/-0.2 ˚C)
Answers: 1
Chemistry, 22.06.2019 02:00
In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al
Answers: 1
Chemistry, 22.06.2019 04:20
Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h
Answers: 1
Chemistry, 22.06.2019 11:30
Determine the reaction and balance the following equations urgent due in the morning
Answers: 2
Chemistry, 22.06.2019 14:30
The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as
Answers: 2
The molar mass of an unknown organic liquid (M ~ 100) is determined by placing 5 mL of the liquid in...
Social Studies, 26.12.2020 01:00
English, 26.12.2020 01:00
Mathematics, 26.12.2020 01:00
English, 26.12.2020 01:00
Health, 26.12.2020 01:00
Arts, 26.12.2020 01:00
Computers and Technology, 26.12.2020 01:00
Mathematics, 26.12.2020 01:00
Biology, 26.12.2020 01:00
Geography, 26.12.2020 01:00