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A solution of ammonia and water contains 4.70×10^25 water molecules and 7.80×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
a mixture with 75% R and 25% S has an optical rotation of -30. what is the optical rotation of pure R?
some inexpensive humidity detection systems consist of a piece of paper saturated with Na2CoCl4 that changes colors in dry or humid air.
How much energy is released when 32.4 g of water freezes? The heat of fusion for water is 6.02 kJ/mol.
At 4.00 L, an expandable vessel contains 0.864 mol of oxygen gas. How many liters of oxygen gas must be added at constant temperature and pressure
a volume 10.0ml of a 0.00550 m solution of cl- ions are reacted with 0.500 m soultion of agno3. what is the maximum
Integrate the expression = 1/V (?V / ?T) at constant pressure, assuming that is independent of temperature. By doing so, obtain an expression for V as a function of T and at constant P.
An atomic emission spectrum of hydrogen shows the following three wavelengths: 1875nm, 1282nm, and 1093nm. Assign these wavelengths to transitions in the hydrogen atom.
A flask that can withstand an internal pressure of 2491 torr, but no more, is filled with a gas at 21.0°C and 758 torr and heated. At what temperature will it burst?
Draw a 3-dimensional sketch, using dashes and wedges. Be sure to show all atoms (no line drawings), to draw pi bonds (with sets of overlapping p orbitals) and to include the orientation of lone pairs of electrons.
Calculate the molarity of each of the following solutions 20.0 g NaCl in 1.0 L H2O
hfcs hydrofluorocarbons are replacing cfcs chlorofluorocarbons because the c-h and c-f bonds are stronger than c-cl
Standard Temperature Pressure and Volume, The respiratory rate of a person is 20 breathes per minute. If every average breath is about 310cm^3 of air at 22C and 740mmHG
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