Reference no: EM13207285
1. Briefly explain why it was not necessary for you to determine the mass of unknown liquid that you transferred to the flask before heating.
2. Would the molar mass of a volatile liquid, calculated using the procedure in this experiment, be incorrectly high, incorrectly low, or unaffected by the following procedural changes?
(a) You did not completely vaporize the liquid when you heated it.
(b) The foil cap got wet while you were cooling the flask and its contents with running water.
(c) You added the boiling stone to the flask after you had already determined the mass of the empty flask and foil cap.
(d) You forgot to measure the volume of the flask, so you used the volume printed on the flask for your calculations.
(e) Your unknown liquid had a boiling point of 102.3 Celsius.
3. The density of air at 100.0 deg. Celcius is less than 1.00g L^-1. Is it reasonable to assume that the vaporized liquid will force all of the air from the flask during heating? Briefly explain.
|
How often do you look at a clock or watch during the day
: How often do you look at a clock or watch during the day? Is there anything unnatural about being governed by clocks or watches? What would happen to modern society if all the timepieces stopped, never to run again?
|
|
State what is the volume of nitrogen at stp
: Using the dumas method, you find that a sample weighing 71.6mg gives 3.84mL of nitrogen gas at 23 deg.celcius and 785 mmHg. What is the volume of nitrogen at STP?
|
|
Compute a consumer price index for apples for each year
: Abby consumes only apples. In year 1, red apples cost $1 each, green apples cost $2 each, and Abby buys only 10 red apples. In year 2, red apples cost $2, green apple costs $1, and Abby buys only 10 green apples. a. Compute a consumer price index ..
|
|
What does the artist represent in the piece
: What does the artist represent in the piece? What story is he/she trying to tell? If the piece is a painting, which genre does it come from
|
|
Explain the molar mass of a volatile liquid
: Briefly explain why it was not necessary for you to determine the mass of unknown liquid that you transferred to the flask before heating.
|
|
How much are the trademark licensing rights worth
: When the colts won the super bowl the demand for peyton manning's jersey was: P = 210 - 0.002Q with a corresponding marginal revenue of: MR = 210 - 0.0004Q IF the marginal cost of producing a jersey is $10, how much are the trademark licensing rig..
|
|
How much are the trademark licensing rights worth
: When the colts won the super bowl the demand for peyton manning's jersey was: P = 210 - 0.002Q with a corresponding marginal revenue of: MR = 210 - 0.0004Q IF the marginal cost of producing a jersey is $10, how much are the trademark licensing rig..
|
|
Depict an approximante titration curve
: Draw an approximante titration curve for the titration of 75 mL of 0.020 M NH3 (pKa of NH4=9.24) with 0.10 M HCl. Label the axes
|
|
Domestic violence within the family
: Explain how you will respond if there is domestic violence within the family you work for and find the list three resources available in your community for children who have been abused, where you can report abuse
|