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A 2.5 g sample of a gas fills a 5 liter container. If the pressure in the container is 1.2 atm at a temp of 27 C, what is the molecular weight of the gas in g/mol?
If a volume of 21.00 ml of NaOH solution is required to reach the equivalence point in titration of a weak acid, what relationship exists between pH and pKa of the acid after 9.00 ml of the NaOH solution has been added?
A distance of 200 ft must be taped in a manner to ensure a standard deviation smaller than ± 0.03 ft. What must be the standard deviation per 100 ft tape length to achieve the desired precision?
The students continued to do the experiment and determined the negative heat capacity of a metal and heats of reaction, using the negative heat capacity for the calorimeter.
determine the number of chloride ions in 11.73 g of magnesium
a female patient requires 2.70times10-2 grams of a sulfa drug then determines how many tablets should be given to her
At 700 Kelvin the Kp=54 for H2 + I2 > 2HI and Kp=1.04E-4 for N2 + 3H2 > 2NH3. Determine the Kp for reaction 2NH3 + 3I2 > 6HI + N2 at 700 Kelvin.
A dry-cleaning solvent (molecular weight = 146.99 g/mol) that contains C, H, and Cl is suspected to be a cancer-causing agent. When a 0.299 g sample was studied by combustion analysis, 0.537 g of CO2 and 0.0727 g of H2O formed.
what is the pressure of H2 gas collected over water when the total pressure is .980 atm at 25 degrees celsius.
What is the pH of Sodium Acetate solution before the HCL is added and after the HCL is added?
How much HCl is produced from the reaction of an excess of HSbCl4 with 3 moles H2S in the following reaction? HSbCl4 + H2S ! Sb2S3 + HCl
Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 75 meters and a wind-conversion efficiency of 25 percent.
how much energy will be needed to heat 45.7 gal of water from 22.0 oc to 110.0 oc? note that temperature 110.0 oc can
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