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Olegator
8 days ago
7

Suggest how the following requirements might be rewritten in a quantitative way. You may use any metrics you like to express the

requirements Req. 1 The library system shall be easy-to-use. Req. 2 The library system shall provide reliable service to all classes of user. Req. 3 The library system shall provide a rapid response to all user requests for book information
Computers and Technology
1 answer:
Amiraneli [1K]8 days ago
3 0
Have you received the answer yet, or should I send it?
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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
Natasha_Volkova [1026]

Answer:

C3H8

Explanation:

Step 1:

Relevant details from the question are noted below:

Mass of the alkane is 1.17g

Volume (V) = 674 mL

Temperature (T) = 28°C

Pressure (P) = 741 mmHg.

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

Step 2:

Convert to the appropriate units.

For Volume:

1000mL = 1L

So, 674mL = 674/1000 = 0.674L

For Temperature:

Temperature in Kelvin = Temperature in Celsius + 273

Temperature in Celsius = 28°C

Temperature in Kelvin = 28°C + 273 = 301K

For Pressure:

760mmHg = 1atm

So, 741 mmHg = 741/760 = 0.975atm

Step 3:

Calculate the moles of the alkane.

The moles of the alkane can be found using the ideal gas equation, presented below:

Volume (V) = 0.674L

Temperature (T) = 301K

Pressure (P) = 0.975atm

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

Number of moles (n) =?

PV = nRT

n = PV /RT

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

n = 0.0266 moles

Step 4:

Calculate the alkane’s molar mass.

Mass of alkane = 1.17g

Number of moles = 0.0266moles

Molar Mass =?

Number of moles = Mass/Molar Mass

Molar Mass = Mass/Number of moles

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

Step 5:

Determine the molecular formula of the alkane.

This is based on:

The general formula for alkanes is CnH2n+2

To find the molecular formula, we start with n = 1, 2, 3, etc., until we find the 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

It can be observed that for n equal to 3, the molar mass is 44g/mol.

Thus, the molecular formula of the alkane is C3H8.

7 0
1 month ago
In cell e5, create a formula using the vlookup function to determine the dog type for teen anna morante based on the program cod
Natasha_Volkova [1026]
Hi! For utilizing the VLOOKUP function, you require the value to search for, the table’s range, and the specific column that has the return value. In your scenario, you provided both the range and the column; however, it’s unclear what value you wish to look up. For this explanation, let’s assume you want to search for the value in cell D5. Feel free to modify it according to your needs.

In syntax form, it will be:
=VLOOKUP(D5,G4:H7,2)
3 0
1 month ago
Read 2 more answers
Compute the approximate acceleration of gravity for an object above the earth's surface, assigning accel gravity with the result
maria [1035]

Response:

Written in Python

G = 6.673 *pow(10,-11)

M = 5.98 *pow(10,24)

d = float(input("Enter distance: "))

g = (G * M)/(pow(d,2))

print("Calculated gravity acceleration: "+str(g))

Explanation:

The following line sets the gravitational constant

G = 6.673 *pow(10,-11)

This line establishes the mass of the Earth

M = 5.98 *pow(10,24)

This prompts the user to input the object's distance

d = float(input("Enter distance: "))

This calculates the gravity exerted on the object

g = (G * M)/(pow(d,2))

This line outputs the gravity acceleration without rounding

print("Calculated gravity acceleration: "+str(g))

8 0
1 month ago
Which type of testing is done when one of your existing functions stop working?
oksian1 [950]
The answer to the question is "alpha testing". Alpha testing aims to address issues like errors and debugging before software is launched. This testing is performed by developers when problems arise. In the software testing process, alpha testing occurs first, followed by beta testing. During alpha testing, developers check existing modules or functions that may have malfunctioned, ensuring any detected errors are addressed.
6 0
1 month ago
A regional trucking company landed a contract to supply products for a major retailer. To do this, it needs to hire an IT profes
zubka84 [1067]
I believe the answers are F and A
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8 0
27 days ago
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