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Calculate the density of a cube of unknown mental which weighs 38g and has a side of length 4cm.
Write the reactions for the preparation of the diaonuim salt for the coupling of the salt with the sodium salt of 2-napthol. 2. Write the reaction of the sodium salt of para red when treated with 1 M H2SO4. Why does a precipitate form?
Concentrated sulfuric acid has a concentration of 18 M. How much concentrated sulfuric acid would be needed to make 255 mL of 1.0 M sulfuric acid?
what is the partial pressure of argon? If the two flasksare connected through a stopcock and the stopcock is opened, whatis the total pressure?
A gas filled balloon with a volume of 12.5 L at 0.90 atm and 294 K is allowed to rise to the stratosphere where the temperature is 268 K and the pressure is 1.0 millibar. What is the final volume of the balloon ? (1.0 atm = 1.013 bar).
Determine how many kgs of methane (CH 4 ) are in completely insulated piston with the given properties: Pressure = 3 bar absolute. Volume = 2 cubic meters.
the third bulb has a volume of 30.0 mL and contains 4.96 atm of hydrogen. If the stopcocks (valves) that isolate all three bulbs are opened, what is the final pressure of the whole system in atm?
Calculate the pH when 3.06 g of NaClO is added to 57.2 mL of 0.50 M HClO. Ignore any changes in volume.
a .350 g sample of a biomolecule was dissolved in 15.0 g of chloroform, and the freezing point depression was determined to be .240 degree celcius. Calculate the molar mass of the biomolecule.
A gas sample containing 1.64 mol at 25°C exerts a pressure of 389 torr. Some gas is added to the same container, and the temperature is increased to 50.°C.
Determine the empirical and molecular formula and draw the Lewis structure for a compound
Given the reaction: 2Al + 3H2SO4 -> 3H2 + Al2(SO4)3 what would be the total number of moles of H2SO4 needed to react completely with 5.0 moles of Al ?
Determine what was the % of excess air used? If The reactant entered at 93 degrees Celsius and
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