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A sample of air contains 2.33 x 10^-4 mg of lead per mL of gas. This air passes through an office, the volume of which is 3.25 x 10^4 L. Seven people normally work in this office. How many mg of lead will each person in the office receive from this sample? (assume all the lead is absorbed)
My answer is 7.57x10^3mg
Is this correct? Does it have the correct amount of significant digits?
How many liters of ethane, measured at 17.0 degrees Celsius and 719 Torr, must be burned to liberate 2.94 X 10^4 kJ of heat?
Give explanation for arrangements how you decide the boiling points comparison - Arrange all these compounds in order of increasing boiling points
Calculate the mass of water produced when 5.41 g of butane reacts with excess oxygen
A scientists places 4.00 moles of Argon, Ar (g) and 2.00 moles of Helium, He (g) into a flask at the temperature of 298 Kelvin and measures the pressure to be 3.00 atm. calculate the pressure due to Helium gas?
What is the cell potential at each of the given volumes as a. 5.00 mL,b. 12.00 mL,c. V equilvalence pointd. 48.00 mL of added Ce4+?
Draw the structure of the major organic product you would expect from the reaction of 1-bromopropane with NaCN.
Suppose a sample of solid hydrogen is held under an external pressure of 0.030 atm and heated from 5 to 300 K. What phase change(s), if any, will occur?
A mixture of CaCO3 and CaO weighing 0.680 g was heated to produce gaseous CO2. After heating, the remaining solid weighed 0.489 g.
The dimensions of a rectangular solid are 8.45 cm long, 4.33 cm wide and 2.85 cm high. If the density of the solid is 9.43 g/cm3, then determine the mass?
Salicylic Acid is used to make asprin. Salicylic acid contains 60.8 mass % Carbon, 4.4 mass % Hydrogen and 34.8 madd % of Oxygen. What is the empirical formula for Salicylic acid?
What is the change in total pressure within the chamber following the reaction? Assume a constant temperature throughout the process.
What is the pressure of the gas in mmHg if the volume is changed to 8.53 L? The temperature remains constant. In scientific notation.
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