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Write an orbital diagram for the ground state of the Calcium atom. Is this atomic substance diamagnetic or paramagnetic?
A sample of 30.0 ml of krypton gas, Kr, is at 756 mm Hg and 25.0 degree celsius. What is the new volume if the pressure is decreased to 325 mm Hg and the temperature is decreased to -12.5 degree celsius?
A water treatment plant has a flowrate of 6,000 m3/d. Determine the following (assume filtration rate is 60 m3/d-m2): a. Total filter area
Write a balance equations for both half-reactions for the redox. combine them to determine the overall balanced
If a sample with an initial activity of 15 mCi(microcurries) is injected into a patient, what is the activity in 24 hours, assuming that none of the sample is excreted?
What mass of sucrose should be combined with 462 of water to make a solution with an osmotic pressure of 8.30 at 270 ? (Assume the density of the solution to be equal to the density of the solvent.)
The mass of calcium fluoride that results from the reaction of 3.00 grams of calcium and 2.00 grams of fluorine is 4.02 grams. What is the percent yield?
If 42.3 L of PH3 forms when 85.1L of H2 (g) reacts with 167.6 (g) of P4 at STP. What is the percent yield.
What force keeps the gases of the earth's atmosphere from diffusing into interplanetary space, where the pressure is essentially zero?
what is the change in pH after addition of 10.0mL of 1.0M sodium hydroxide to 90.0mL oof a 1.0M NH3/1.0M NH4+ buffer? (Kb for ammonia is 1.8 X 10-5)
Consider the equation A(aq) + 2B(aq) -> 3C(aq) + 2D(aq). In one experiment, 45.0 mL of 0.050 M A is mixed with 25.0 mL 0.100 M B. At equilibrium the concentration of C is 0.0410 M. Calculate K.
how many moles of oxygen are required to react completely with 5 mol C8H18?
0.10 gram sample of a gas occupies 47 ml of vol at 25 deg C and 755 mm Hg. What's the FW of the compound?
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