1. When the temperature of a rigid hollow sphere containing 685 L of helium gas is
1 answer:
<h3>Answer:</h3>
250.756 moles He
<h3>Explanation:</h3>From the question we are given;
Volume, L = 685 L
Temperature, T = 621 K
Pressure, P = 189 × 10 kPa
We are required to calculate the number of moles of the gas,
Using the Ideal gas equation,
PV = nRT, where P is the pressure, V is the volume, T is the temperature, n is the number of moles, and R is the ideal gas constant.
We can replace the known variables and constant in the equation to get the unknown variable, n.
Using ideal gas constant as 8.3145 L.kPa/K/mol
n = 250.756 moles
The moles of helium contained in the sphere is 250.756 moles
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Answer:
Hence , in a century<u> 0.342 liters</u> of the liquid will drip.
Explanation:
The rate of the flow of the liquid droplet is given by:
<u>Unit conversion:</u>
We need to change mL/hr into Liter/century
1 L = 1000 mL (given)
1 mL = 0.001 L......(1)
1 century = 100 year
1 year = 365 days
So, 1 century = 100 x 365 days = 36500 days
1 day = 24 hrs
So , 36500 days = 36500 x 24 hr = 876000 hr
Hence ,
1 century = 36500 days = 876000 hr
we are not asked to calculate the answer in days
1 century = 876000 hr
1 hr = 1/ 876000 century
.....(2)
From (1) and (2) put the value in the given formula:
This is for 1 mL/hr to 1 L/century
Now for 300 mL/hr . the rate will be more , multiply the answer by 300
Rate = 0.342 Liters / century
Hence , in a century 0.342 liters of the liquid will drip.