One method to determine the flow rate of a turbulently flowing stream is to inject a small, metered amount of some easily dispersed fluid and then to measure the concentration of this fluid in a sample of the mixed stream withdrawn a suitable distance downstream. In pharmaceutical plants, there are often Problems 195 many inert gas streams (i. e., streams that contain mostly nonreacting gases). In a particular plant, there is a process stream that is composed of 95 mol% N2 (inert) and 5 mol% O2. To determine the flow rate of this process stream, O2 is injected at a flow rate of 16.3 mol/hr. A downstream sample analyzes the O2 content at 10 mol%. You can assume that no reactions occur in the pipe and that the flows are operating at steady-state. (a) How many balance equations can you write? How many of those are linearly independent? (b) Calculate the flow rate of the process stream containing 95 mol% N2 and 5 mol% O2.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

you need to stop taking that class