Question
4. What is the molar mass of a compound if a gaseous sample has a density...
4. What is the molar mass of a compound if a gaseous sample has a density of 1.173 g/L at 20 °C and 630 torr? The temperature in Celsius is known to two significant figures.
5. A 1.50-L bulb containing Ne at 125 torr is connected by a valve to a 2.50-L bulb containing CH4 at 650 torr. The valve between the two bulbs is opened and the two gases mix. The initial gas pressures as known to three significant figures.
(a) What is the partial pressure (torr) of Ne? (b) What is the partial pressure (torr) of CH4? (c) What is the total pressure?
(d) What is the mole fraction of Ne?
-
Consider the following: SiH3Cl, O2, CF3H, and CF4.
(a) Which one will diffuse the fastest?
(b) What is the rms speed (m/s) of the slowest-moving molecule at 25°C?
Answers
4)
P= 630.0 torr
= (630.0/760) atm
= 0.8289 atm
T= 20.0 oC
= (20.0+273) K
= 293 K
density = 1.173 g/L
Lets derive the equation to be used
use:
p*V=n*R*T
p*V=(mass/molar mass)*R*T
p*molar mass=(mass/V)*R*T
p*molar mass=density*R*T
Put Values:
0.8289 atm * MM = 1.173g/L * 0.08206 atm.L/mol.K *293.0 K
MM = 34.0228 g/mol
Answer: 34.0 g/mol
Only 1 question at a time please
Similar Solved Questions
1 answers
An analysis of the combined SAT scores (Verbal + Math) of a sample of psychology majors at one school indicated that the mean was 939 and the standard deviation was 166
An analysis of the combined SAT scores (Verbal + Math) of a sample of psychology majors at one school indicated that the mean was 939 and the standard deviation was 166. Show your calculations used the answer the following two questions.a. A special psychology research program only accepts applicant...
1 answers
Exercise 10-4 Direct Labor and Varlable Manufacturing Overhead Variances (LO10-2, LO10-3] Erie Company manufactures a mobile...
Exercise 10-4 Direct Labor and Varlable Manufacturing Overhead Variances (LO10-2, LO10-3] Erie Company manufactures a mobile fitness device called the Jogging Mate. The company uses standards to control its costs. The labor standards that have been set for one Jogging Mate are as follows: Standard H...
1 answers
Chapter 1 1. What is a network effect and why is it valuable? 2. What is...
Chapter 1 1. What is a network effect and why is it valuable? 2. What is information asymmetry? Describe how has it changed or stayed the same with the advent of e-commerce....
1 answers
Mat t be identifll ricating oil for machili who can id kers Whcsform the materials into...
mat t be identifll ricating oil for machili who can id kers Whcsform the materials into a finished product. n be identified directly, al l transfor orkers the materials into a finished product, often directly WI reasonable cost. manufacturing overhead Al production costs except transsufacturing over...
1 answers
Problem 5. Prove the following result for any number a and discrete random variable X. 티(X-a...
Problem 5. Prove the following result for any number a and discrete random variable X. 티(X-a 21 = Var(X) + (E(X)-a)2 You must start your proof by using the definition of the expected value of a function of a discrete random variable, i.e. where g(x)- (x-a)...
1 answers
A 27.0 mL sample of 0.356 M ammonia, NH3, is titrated with 0.249 M hydrobromic acid....
A 27.0 mL sample of 0.356 M ammonia, NH3, is titrated with 0.249 M hydrobromic acid. (1) Before the addition of any hydrobromic acid, the pH is (2) After adding 16.8 mL of hydrobromic acid, the pH is (3) At the titration midpoint, the pH is (4) At the equivalence point, the pH is (5) After adding 55...
1 answers
4. Section Method (4 points) Using the section method (the average end area method), determine the...
4. Section Method (4 points) Using the section method (the average end area method), determine the required volume of the cuts and fills for a new road. The cuts and fills for each station are shown in Table below Express your answer in cubic yards. Cut (sf) Fill (sf 120 100 Station 1+00 1+50 2+00 2...
1 answers
4. Let X and Y be continuous random variables with joint density function f(x, y) =...
4. Let X and Y be continuous random variables with joint density function f(x, y) = { 4x for 0 <x<ys1 otherwise (a) Find the marginal density functions of X and Y, g(x) and h(y), respectively. (b) What are E[X], E[Y], and E[XY]? Find the value of Cov[X, Y]...
1 answers
Calculate High-Low Method, Cost Formulas During the past year, the high and low use of three...
Calculate High-Low Method, Cost Formulas During the past year, the high and low use of three different resources for curred in on. The resources are airplane erection for m ance. There w the river. The total of the the r e and theredumber of hours are and h o Resource Airplane Flight Hours Total Cos...
1 answers
Please help me with the question below with detailed steps for each part, thank you! 43....
Please help me with the question below with detailed steps for each part, thank you! 43. a. In 1965, a newspaper carried a story about a high school student who reported getting 9207 heads and 8743 tails in 17,950 coin tosses. Is this a significant discrepancy from the null hypothesis Ho: P b. Jac...
1 answers
Blossom Lakes Park is a private camping ground near the Mount Miguel Recreation Area. It has...
Blossom Lakes Park is a private camping ground near the Mount Miguel Recreation Area. It has complled the following financial Service revenue (from camping fees Sales revenue (from general store) $18.140 73.000 Accounts payable $155.200 38.800 16,060 12.410 166,440 Dividends Notes payable Expenses d...
2 answers
If #a=12, b=9#, and #c=4#, what is #(2c^3-ab)/4#?
If #a=12, b=9#, and #c=4#, what is #(2c^3-ab)/4#?...
1 answers
An object is placed in front of a converging lens in such a position that the...
An object is placed in front of a converging lens in such a position that the lens (f = 15.0 cm) creates a real image located 28.0 cm from the lens. Then, with the object remaining in place, the lens is replaced with another converging lens (f = 19.0 cm). A new, real image is formed. What is the ima...
1 answers
Imagine you created a toxin such that when a neuron fired an action potential, the toxin...
Imagine you created a toxin such that when a neuron fired an action potential, the toxin would bind immediately to the sodium-potassium pump at the top of the action potential, but the sodium and potassium channels would still function. What process(es) would be affected?...
1 answers
The only ideas that can be used include: area ABCI-RA2(A+B+C-lpi), the Pythagorean theorem: Cos c cos a cos b. Vectors-dot product cross product, sin A-sin a/sin c; cos A-cos a sin b/sin c; spher...
The only ideas that can be used include: area ABCI-RA2(A+B+C-lpi), the Pythagorean theorem: Cos c cos a cos b. Vectors-dot product cross product, sin A-sin a/sin c; cos A-cos a sin b/sin c; spherical law of sines, spherical law of cosines for sides and spherical law of cosines for angles Let r be th...
1 answers
Here are the results obtained by Western type immunoblotting on cell signaling proteins. WB represent 4...
Here are the results obtained by Western type immunoblotting on cell signaling proteins. WB represent 4 experimental conditions (time 0, 5, 15 and 30 minutes of stimulation with a ligand on total cellular extracts) Question 6. Why use an antibody that recognizes the phosphorylated form (p-ERK) and ...
1 answers
Question 1 0.75 pts The table below describes output and interest rates in Westeros from 2012...
Question 1 0.75 pts The table below describes output and interest rates in Westeros from 2012 to 2015. Which of the following events best explains the movement in the economy between 2013 and 2014? Year Interest Rate Output Gap 0.03% 2012 4.2% 2013 -1.12% 3.6% 2.1% 2014 -0.74% 2015 -0.21% 2.4% The c...