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Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties? why?
A) Br, I
B) Rb, Cs
C) S, Se
D) N, O
E) Kr, Xe
A syringe filled with air can be used to test the relationship between the temperature and the volume of a sample of gas. The syringe has a movable plunger that allows an enclosed sample of gas to be held at a constant external pressure, so the ga..
Following a terrorist release of Cesium-137 (half-life of 30 years) in downtown, clean up efforts were successful in removing all but 100 curies. How long will it take for the contamination to decay to about 5 curies?
50 mL of 0.1200 M hydroxyacetic acid (pKa = 3.83) are titrated with 0.1280 M KOH. What is the pH after the addition of 48.6 mL of the base
Draw the structures and write the IUPAC names of the two alkenes formed when 2-hexanol undergoes a condenstation reaction in the presence of an acid catalyst
Which one of the following molecules has tetrahedral geometry?
2 Co (NO3)3 + 3 (NH4)2 S = Co2 S3 +6NH4 NO3 How many nitrogen atoms are on each side of the equation
If the pressure is increased to 120 bar, the melting temperature increases to 375.88 K. Calculate DeltaHo fusion and Delta So fusion for this substance
(a) Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (b) What is the pH in the Pt | H+ | H2 half-cell. (c) What is the value of the equilibrium constant for the reaction occurring in this cell
light travels extremely rapidly c 3.00times108 . suppose you had to travel 29 miles to work every day. if you traveled
what is the total molar concentration of all the ions in 0.030 M solutions of the following salts in water? a) 0.030 M KCl = ________ M ions b) 0.030 M CuSO4 = _____ M ions c) 0.030 M CaCl2 = _______ M ions
A balloon is filled to a diameter of 30.5 cm with air in Los Angeles when the temperature is 25 degrees C. It is brought to Flagstaff where the temperature is 5 degrees C
net ionic equation for the reaction of 0.100 M nitrous acid with Barium hydroxide. Calculate the pH of the acid - I'm lost - can you help with the calculations
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