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A cube of osmium metal 1.500 cm on a side has a mass of 76.31 g at 25°C. What is the density in g/cm3 at this temperature? (b) The density of titanium metal is 4.51 g/cm3 at 25 degrees C. What mass of titanium displaces 125.0 mL of water at 25 degrees C? (c) The density of benzene at 15 degrees C is 0.8787 g/mL. Calculate the mass of 0.1500 L of benzene at this temperature.
consider the compound alum al2so43 which has a molar mass of 342.14 gmol.a. how many moles of alum are there in 73.6 g
In a titration of 38.16 mL of 0.1234 M hydrazoic acid (HN3, Ka = 1.900x10-5) with 0.08559 M KOH, what is the pH after 87.78 mLs of titrant have been added
The other plate was placed in a chamber containing hexane, and after developed it showed two spots, one with an Rf value of 0.54 and one with an Rf value of 0.37. Explain how this occurred
A solution that is a mixture of 0.4 mol C2H4Br2 and 0.6 mol C3H6Br2 has a vapor pressure of 145 mmHg at a particular temperature. Determine the vapor pressure of pure C3H6Br2 at this temperature,
Determine the pH of a solution of a .150 M NaF solution. (ka for HF=3..5*10^-4) 3)Determine the pH of .050 M H2CO solution and the % dissociation of each step
Phenol is a common organic compound that may be used as a disinfectant. Its pKa in water is 10.0 while in methanol its pKa = 14.4. Is it a stronger acid in water or methanol? Explain the difference in the pKa for phenol in the different solvents.
A solution is made by mixing 40.0 mL of ethanol, C2H6O, and 60.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C
How many grams of CH4 is needed to produce 49.0 g CHCl3? CH4(g) + 3 Cl2(g)-> CHCl3(g) + 3 HCl(g)
you want a solution that will buffer the addition of either 10 micro moles of acid or 10 micro moles of base. total buffer concentration is equal to the concentration of the acid plus the concentration of salt in the acid. which of the following b..
Explain how some solids (compounds that are solids at room temperature) can be analyzed by gas chromatography. Also, how can they be introduced into the injector port and column
what mass of water would you need to evaporate from your skin in order to dissipate 1.7 x 105 j of heat from your body?
Small air bubbles in the salt bridge may not be a problem. How can the presence of air bubbles in the salt bridge alter the effectiveness of this salt bridge
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