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Lesechka [4]
2 years ago
8

Please answer these!!!! :D

Mathematics
1 answer:
Burka [1]2 years ago
5 0
Question 7: greater than
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PLEASE HELPPPPPPP
Fed [463]

Answer:

Molar mass = 254.60g/mol

Step-by-step explanation:

Mass = 8.02g

Volume = 812mL = 0.812L

Pressure (P) = 0.967atm

Temperature of the gas = 30°C = (30 + 273.15)K = 303.15K

Molecular weight = ?

To solve this question, we'll have to use ideal gas equation, PV = nRT

P = pressure of the gas

V = volume of the gas

n = number of moles of the gas

R = ideal gas constant = 0.082J/mol.K

T = temperature of the gas

PV = nRT

n = PV / RT

n = (0.967 * 0.812) / (0.082 * 303.15)

n = 0.7852 / 24.8583

n = 0.0315 moles

Number of moles = mass / molarmass

Molarmass = mass / number of moles

Molar mass = 8.02 / 0.0315

Molar mass = 254.60g/mol

The molar mass of the gas is 254.60g/mol

3 0
3 years ago
In order to avoid heavy traffic, Antonio can drive home after working less than 7 hours or after working more than 9 hours. How
NISA [10]

Answer: h < 7 or h> 9

Step-by-step explanation:

just did the test

4 0
3 years ago
A man is lying on the beach, flying a kite. He holds the end of the kite string at ground level and estimates the angle of eleva
Ulleksa [173]
This question uses trig

sin(55) = height/195

Therefore, height = 195sin(55) meters (just plug in calculator)
7 0
2 years ago
Will give brainliest give the answer and steps
Inessa05 [86]
What variable??????????
8 0
2 years ago
What is the value of x?
Alisiya [41]
The value of x is 3.14
7 0
3 years ago
Read 2 more answers
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