Bacterial cell walls can withstand osmotic pressures up to 4.00 atm when placed

Question

Bacterial cell walls can withstand osmotic pressures up to 4.00 atm when placed in water. Calculate the total morality of all solute particles inside the bacteria when it reaches this osmotic pressure at 25.0 degree C a) 0.00161 M b) 0.163 M c) 1.95 M d) 0.0192 M e) 4.00 M The interaction responsible for the cohesive intermolecular forces of liquid nitrogen is: a0 hydrogen bonding b) the London dispersion force c) dipole-dipole interaction d0 covalent bonding Methane (CH_4) is an important trace gas in Earth's atmosphere currently constituting about 0.00018%, What is the concentration of CH_4 in parts per billion (ppb) in the atmosphere? a) 18 ppb b) 1.8 ppb c) 1800 ppb d) 18000 ppb

Explanation / Answer

8) concnetration, C = P/RT

= 4.0 atm/(0.08206 L atm/molK*(25+273)K)

= 0.163 M

The correct option is B.

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