2. [Mixing] Chlorine gas containing 2.4% O2 is flowing through an earthenware pipe. The gas flow is measured by introducing air into it at the rate of 3.25 m/min and further down the line, after...

Please answer the mixing problem

Extracted text: 2. [Mixing] Chlorine gas containing 2.4% O2 is flowing through an earthenware pipe. The gas flow is measured by introducing air into it at the rate of 3.25 m/min and further down the line, after mixing is complete, removing a sample of the gas for analysis. The gas is now found to contain 10.85% O2. How many m/min of the gas were flowing through the pipe? [Drying] After drying, a batch of leather is found to weigh 450 kg and to contain 7% moisture (db). During drying, the leather lost 59.1% of its original weight when wet. Calculate: a) % of bone-dry leather in the original stock b) Number of kg of water removed/kg bone dry leather c) % of water removed based on water originally present. [Crystallization] A hot solution containing 35% MgSO4 and 65% H2O is cooled to 15°C. During cooling, 4% of the total water in the system evaporates. How many kg of Epsom salt crystals, MgSO4.7H20 are obtained per metric ton of the original mixture? Solubility of MgSO4 at 15°C is 0.245 parts MgsO4 per part solution. Topic : Material Balance without Chemical Reactions (Single Unit)