Question
An unknown gaseous hydrocarbon consists of 85.63% carbon by mass. A 0.100-g sample of the gas...
An unknown gaseous hydrocarbon consists of 85.63% carbon by mass. A 0.100-g sample of the gas occupies a volume of 0.0533 L at STP. What is the identity of the gas? A. C4H8 B. C3H6 C. C2H4 D. C5H10 E. CH2
Answers
% of carbon = 85.63%
% of Hydrogen = 100 - 85.63 = 14.37%
Calculate atomic ratio by dividing % composition by atomic mass.
Mass ratio of carbon = 85.63/12 = 7.13
Mass ratio of hydrogen = 14.37/1 = 14.37
Now calculate simplest ratio by dividing atomic ratio by smallest atomic ratio
Simplest ratio of carbon = 7.13/7.13 = 1
Simplest ratio of hydrogen = 14.37/7.13 = 2.015 = 2
Empirical formula of compound = CH2
According to avogadro's law 1 mole occupy volume 22.414 L
then 0.0533 L = 0.0533/22.414 = 0.002377978 mole
0.002377978 mole = 0.100 gm then 1 mole = 1
0.100 / 0.002377978 =42.05 gm
molar mass of gas = 42.05 gm
Empirical formula mass = (12
n = molecular formula mass / Empirical formula mass = 42.05/14 = 3
Molecular formula = n
Molecular formula of compound = C3H6
Answer - B. C3H6
We were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this image
Similar Solved Questions
1 answers
Renal 3. Develop at least one Nursing Care plan for Chronic Renal Failure
Renal 3. Develop at least one Nursing Care plan for Chronic Renal Failure...
1 answers
2. Let's try an example of the mark-and-recapture method. You would like to estimate the size...
2. Let's try an example of the mark-and-recapture method. You would like to estimate the size of a population of wood frogs in a pond. You begin your sampling with a first capture of 22 individuals and you mark all of them. When you return, you capture 16 wood frogs and four of them are marked. ...
1 answers
Answer these 4 . will rate after If the prices in the United States decrease compared...
answer these 4 . will rate after If the prices in the United States decrease compared to other countries, we would expect o the demand for dollars to increase because U.S. goods are cheaper. the demand for dollars to decrease because U.S. goods are more expensive. the supply of foreign currenc...
1 answers
Page 3 of 3 Gas Density and Molar Mass 9. The density of a diatomic gas...
Page 3 of 3 Gas Density and Molar Mass 9. The density of a diatomic gas is 1.634 g/L at 1.50 atm and 40.0°C. Calculate the molar mass of the gas, and use the periodic table to identify the gas. (10 pts)...
1 answers
I need help finding the answer please Suggestions for Solving Organic Spectral Problems Use the mo...
I need help finding the answer please Suggestions for Solving Organic Spectral Problems Use the mo lecular formula to determine the number of rings and/or double bonds 1. HXN + 1 2 2 2 Formula: Doubles bonds and Rings C - Cyclohexane (C,H12) would be 6 -6+ 1 1 for 1 ring or double bond Benzene (C6H6...
1 answers
Ray Company provided the following excerpts from its Production Department's flexible budget performance report. (Round "rate...
Ray Company provided the following excerpts from its Production Department's flexible budget performance report. (Round "rate per hour" answers to 2 decimal places. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None"...
1 answers
JAVA PROGRAMMING You are given an interface PriorityQueue (the source code is at the end of...
JAVA PROGRAMMING You are given an interface PriorityQueue (the source code is at the end of this document) that specifies the protocols for a priority queue with generic values and priorities, where the priorities are discretely ordered rather than comparable. Implement the class ListofQueuesPQ impl...
1 answers
What item/items does Switzerland have that the United States does not have? Why won't Switzerland export...
What item/items does Switzerland have that the United States does not have? Why won't Switzerland export this item to the United States? What item/items does the United States have that Switzerland does not have? Why won't the United States export this item/items to Switzerland?...
1 answers
A sodium light, having wavelength 589.3 nm, is used to view a soap film to make...
A sodium light, having wavelength 589.3 nm, is used to view a soap film to make it look black (no reflection) when directed perpendicular to the film. What is the minimum thickness of the soap film if the index of refraction of soap solution is 1.38? 107 nm 194 nm 294 nm 0314 nm 0214 nm 114 nm...
1 answers
On a cold winter day, the outside temperature is –5.0 °C while the interior of a...
On a cold winter day, the outside temperature is –5.0 °C while the interior of a well-insulated garage is maintained at 20.0 °C by an electric heater. Assume the walls have a total area of 75 m2, a thickness of 0.15 m, and a thermal conductivity of 0.042 W/(m · C°). What is ...
1 answers
Questions 10, 7, 8, 3 1 Normal No Spac Heading 1 Heading 2 Paragraph QUESTION 10...
Questions 10, 7, 8, 3 1 Normal No Spac Heading 1 Heading 2 Paragraph QUESTION 10 Arrange in order of appearance, from earliest to most recent prokaryotes eukaryotes QUESTION 7 Adaptive radiations are ofen seen after which of the following? sexual selection takes place major new evoluionary adapt...
1 answers
He following information is related to the Stone Co. postretirement benefits plan for 2018: Service cost...
he following information is related to the Stone Co. postretirement benefits plan for 2018: Service cost $165,000 Discount rate 10% EPBO, January 1, 2018 822,000 APBO, January 1, 2018 662,000 Actual return on plan assets in 2018 22,600 Expected return on plan assets in 2018 28,800...
1 answers
A car is traveling north at 28.3 m/s. After 12 s its velocity is 14.1 m/s...
A car is traveling north at 28.3 m/s. After 12 s its velocity is 14.1 m/s in the same direction. Find the magnitude and direction of the cars average acceleration...
3 answers
May rides her bike the same distance that Leah walks
may rides her bike the same distance that Leah walks. may rides her bike 10 km/h faster than Leah walks. If it takes May 1 h and Leah 3 h to travel that distance, how fast does each travel?...