I appreciate the help 6. The air quality standard for ozone (O3) is 0.07 ppmv. W

Question

I appreciate the help 6. The air quality standard for ozone (O3) is 0.07 ppmv. What would this standard equate to in ug/m2 in Denver, where the pressure is 0.82 atm and temperature is 15°C? [Answer: 117 ug/m2] 7. The atmospheric concentration of NO2 is 0.05 ug/m2, what is the concentration in ppb at 30 degrees C and 1 atm? [Answer: 0.027 ppb] 8. 3 kg of propane are contained in a 10 gallon cylinder. What is the pressure in the cylinder at a temperature of 75 degrees Fahrenheit? [Answer: 43.8 atm] 9. A 25x13 ft2 room with 9ft ceilings contains 74 mg of SO3. What is the concentration in the following units if temperature is 10°C and pressure is 0.8 atm? a) ppm b) moles S0:/m3 c) ug S/m d) ppby

Explanation / Answer

Ans 5

Volume of gold = 5 gallon x 3.78541 L / 1 gallon

= 18.927 L

Molarity = 0.5 Moles/L

Moles of gold = molarity x volume

= 0.5 Moles/L x 18.927 L

= 9.4635 mol

Molecular weight of Au = 196.97 g/mol

Mass of Au = 9.4635 mol x 196.97 g/mol

= 1864.03 g

Mass of gold in oz = 1864.03 g x 0.0353 oz/g

= 65.8 oz

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