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boiling point of liquid is the temp at which its vapor equals----- 1 mm Hg--760 mmHg or the pressure above the liquid
A calorimetry experiment determined that the combustion of 1.01 g of H2 reacting with excess O2 producing H2O gave q=143 kJ. Calculate the change in enthaply.
The element lithium has two naturally occurring isotopes, 7Li (isotopic mass 7.0160 amu, abundance 92.5 %) and 6Li (isotopic mass 6.0151 amu, abundance 7.50 %). Calculate the atomic mass of lithium.
Heptane (C7H16) and octane (C8H18) are constituents of gasoline. At 80.0 ?C, the vapor pressure of heptane is 428 mmHg and the vapor pressure of octane is 175 mmHg.
Determine the empirical formula of each of the following compounds. (Type your answer using the format CH4 for CH4 and list the elements in the same order as they are mentioned in the problem.)
a bottle containing 315 g of cleaning solution is used for carpets. if the cleaning solution has a specific gravity of
When a container is filled with 3.00 mol of H2 , 2.00 mol of O2 , and 1.00 mol of N2 , the pressure in the container is 465 kPa. determine the partial pressure of O2?
the color change at the endpoint should persist for 30 seconds. Why is this time lapse a good titration technique
Determine the pH of (a) a 0.20 M NH3 solution, (b) a solution that is 0.20 M in NH3 and 0.30 M NH4Cl
aluminum has the mass of 8.37g. when it is placed in a graduated cylinder containing 20.0mL of water, the water level rose 23.1mL. calculate the density and specific gravitas of the object.
Calculate the change in pH that occurs in each of the the solutions listed below as a result of a tenfold dilution with water. Round calculated values for pH to three figures to the right of the decimal point. (b) 0.0500 M HCL (d) 0.0500 M
Consider the change in entropy change that occurs when a box of coins that contains a perfectly ordered array of three moles of coins is shaken. Calculate the entropy of the ordered coins, and then calculate the entropy after the box has been shak..
Using a sample of 0.385 g of Alka-Seltzer, the mass of Carbon dioxide is found to be 0.122 gram. Compute and enter response (in numerical value only) to three significant figures.
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