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If 9 g of Kr initially at 0.2 bar and 15 L is brought to 0.49 bar and 5L, what is the overall change in enthalpy of this process? Assume that Kr is an ideal gas.
What effect does the presence of lone-pair electrons have on the bond angles and the geometry of a molecule?
Calculate the mass of Cu(NO3)2·3H2O needed to prepare 50.0mL of a 0.50 M Cu(II) solution?
The vapor pressure of pure ethyl bromide at this temperature is 400.0 torr. Assuming an ideal solution, what is the molecular mass of the compound?
Consider the following data: expect a BeF2 molecule to be linear but an SF2 molecule to be angular. Explain the decreasing melting point from NaF to Nai.
Ammonia condenses to form a liquid at -33.35C at atmospheric pressure. The density of liquid ammonia at this temperature is 0.6818g/ml. If the ammonia (0.224ml) is condensed at these temperatures, what would be its volume?
a metal object with a mass 19 degrees celsius is heated to 96 degrees celcius, then transfered to a calorimeter containing 75 grams of water at 18 degrees celcius. the water and metal object reach a final temperature of 22 degrees celcius? what is..
Professor Tipton, being an avid hunter, was stalking the woods for morels. He saw a giant morel next to a fallen tree. When he reached down to get it a small timber rattler bit his hand
Calculate the mass of sodium chlorate that must be decomposed to form 6.5 g of oxygen. 2NaClO3(s) → 2NaCl(s) + 3O2(g)
Calculate the molecular rms speeds of He atoms at 10, 100, 1000 K in units of meters per second and miles per hour.
Calculate the pH of a buffer solution composed of 0.10 M butyric acid (CH3(CH2)2COOH, Ka = 1.5 x 1-^-5) and 0.20 M sodium butyrate, (NaCH3(CH2)2COO).
spheres that detect glucose have a diameter of 10nm and are tightly packed into patches. Calculate the number of spheres in a 3-d patch of spheres that is 3mm high and has an area of 6mm^2.
Compute molar mass of ethanol after calculated molar mass in an experiment and the given molar mass of ethanol is 46.07g
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