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Need to dissolve CaCl2 in water to make a mixture that is 28.0% calcium chloride by mass. If the total mass of the mixture is 884.7 g, what masses of CaCl2 and water should be used?
An oxygen tank contains oxygen at a pressure of 70 kPa. When the pressure drops to 36 kPa, the temperature increases from 300 K to 350 K. If the initial volume is 9 L, what is the final volume?
A mixture of 8.50 g He and 26.5 g Ne has a pressure of 880. mm Hg. What is the partial pressure of each of the gases?
An empty beaker has a mass of 38.112 g. 10.00 mL of ethyl alcohol are placed in thte beaker and the mass of the beaker with ethanol is found to be 45.268 g
Discuss the difference between Mass Spectroscopy, Nuclear Magnetic Resonance,
The sulfuric acid in a car battery has a density of 1.225 g/cm3 and is 3.75 M. What is the molality, mole fraction, and percentage of sulfuric acid by mass in this solution?
Assuming a 70.% yield in the overall reaction, what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 9.9 *10^4 kg of coal that is 0.33 mass % sulfur?
An injection containing 10.0pg 10 5 B was injected into a patient suffering from a brain tumor. The patient was irradiated by a neutron gun at the site of the tumor.
When 5.6 grams of NaCl are dissolved in enough water to create a 125-gram solution, what is the solution's concentration, expressed as a percent by mass?
At 1100 K, Kp = 0.25 for the following reaction. 2 SO2(g) + O2(g) reverse reaction arrow 2 SO3(g) What is the value of K at this temperature?
Aromatic Compounds :sample question, Both naphthalene and azulene have 10 pie electrons and are aromatic. Pentalene is apparently antiaromatic and is unstable even at -100 degrees C.
Small helium-neon lasers emit 1.51 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
Calculate the pH of a solution formed by mixing 250 mL of 0.150 M NaHCO3 with 250 mL of 0.100 M Na2CO3. What is the molarity of the prepared buffer?
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