If the temperature of 9.3 l of a gas at 6.5 ºc falls by 6.1 cº, what is the new volume of the gas if the pressure is constant?
select one:
a. 9.10
b. 9.29
c. 0.0133
d. 45.74

b. 9.29 L is the new volume of the gas if the pressure is constant.

Explanation:

As per Charles’s law  

At constant pressure for a given amount of a gas,

Volume is directly proportional to its temperature.

Thus the expression is

where k is a constant  

When there is a change in the volume and temperature the expression will be

where and are the initial volume and initial temperature and and are the final volume and temperature.

Plugging in the values given

(Answer)

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.