Software code is tested, debugged, fixed, verified, and then:

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the gen

Nina [5.8K]

Answer:

C3H8

Explanation:

Step 1:

Data obtained from the question. This includes the following:

Mass of alkane = 1.17g

Volume (V) = 674 mL

Temperature (T) = 28°C

Pressure (P) = 741 mmHg.

Gas constant (R) = 0.08206 atm.L/Kmol

Step 2:

Conversion to appropriate unit.

For Volume:

1000mL = 1L

Therefore, 674mL = 674/1000 = 0.674L

For Temperature:

Temperature (Kelvin) = Temperature (celsius) + 273

Temperature (celsius) = 28°C

Temperature (Kelvin) = 28°C + 273 = 301K

For Pressure:

760mmHg = 1atm

Therefore, 741 mmHg = 741/760 = 0.975atm

Step 3:

Determination of the number of mole of the alkane..

The number of mole of the alkane can be obtained by using the ideal gas equation. This is illustrated below:

Volume (V) = 0.674L

Temperature (T) = 301K

Pressure (P) = 0.975atm

Gas constant (R) = 0.08206 atm.L/Kmol

Number of mole (n) =?

PV = nRT

n = PV /RT

n = (0.975 x 0.674)/(0.08206x301)

n = 0.0266 mole

Step 4:

Determination of the molar mass of the alkane.

Mass of alkane = 1.17g

Number of mole of the alkane = 0.0266mole

Molar Mass of the alkane =?

Number of mole = Mass/Molar Mass

Molar Mass = Mass/number of mole

Molar Mass of the alkane = 1.17/0.0266 = 44g/mol

Step 5:

Determination of the molecular formula of the alkane.

This is illustrated below:

The general formula for the alkane is CnH2n+2

To obtain the molecular formula for the alkane we shall assume n = 1, 2, 3 or more till we arrive at molar Mass of 44.

When n = 1

CnH2n+2 = CH4 = 12 + (4x1) = 16g/mol

When n = 2

CnH2n+2 = C2H6 = (12x2) + (6x1) = 30g/mol

When n = 3

CnH2n+2 = C3H8 = (12x3) + (8x1) = 44g/mol

We can see that when n is 3, the molar mass is 44g/mol.

Therefore, the molecular formula for the alkane is C3H8.

7 0

2 years ago

You need to replace a broken monitor on a desktop system. You decide to replace it with a spare monitor that wasn't being used.

AysviL [449]

Firmware hope this helps!!

6 0

2 years ago

Read 2 more answers

What are the results of Maya’s conspicuous consumption? Check all that apply. - a lack of debt - stress about paying bills - a l

kifflom [539]

Answer:

stress about paying bills

a lack of money for other expenses

great electronic connectivity

Explanation:

The Maya classic period has seen the rise of conspicuous and mass consumption. In the given scenario all the expense her paid by credit cards and cash is rarely used. There will be a stress for paying bills. There will be lack of money available in hand for some routine expenses and mandatory purchases. It gives a great electronic connectivity. All the funds are considered as safe.

4 0

2 years ago

You learn that in a previous security breach at GearUp, a disgruntled employee destroyed the encryption key that had been used t

lukranit [14]

Answer:

The data can be safeguarded using key escrow procedure.

Explanation:

Key escrow basically means to store the cryptographic key in an "escrow" by a reputable trusted third party. The copy of the encryption key is kept with the third party. In case the cryptographic key gets lost or destroyed, then the key escrow service helps to access the encrypted data. It also manages the access control to the key in case the key gets lost. So this way in case of security breach at GearOn the key escrow service can be used to re-implement or access the key easily.

6 0

2 years ago

C# Write, compile, and test a program named PersonalInfo that displays a person’s name, birthdate, work phone number, and cell p

Soloha48 [4]

Answer:

#include <stdio.h>

#Include<iostream>

using namespace std;

//Define required function

PersonalInfo( ) {

printf("Name : Robert Josh\n");

printf("DOB : July 14, 1975\n");

printf("Work Phone : 00-00000000\n");

printf("Cell Phone : 11-777777777\n");

return(0);

}

int main() {

//Call function

PersonalInfo( );

return 0;

}

Explanation:

Its just a simple code to print required details when the function PersonalInfo is called.

5 0

2 years ago