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Write a chemical equation for thermal decomposition of CrCl3*6H2O, based on observation that blue litmus paper moistened in condensation of heated compound/crystals turned pink, indicating presence of an acid.
Gallium-67 is used in nuclear medicine. After treatment, a patient's blood gave a radioactivity of 20,000 counts per minute (counts/min). How long would it be counts before the activity decreased to about 5000 counts/min
Explain how you would prepare 100.0mL of a solution, using pure solute and water, that is 0.050 M in sodium hydrogen phosphate.
If the volume of the original sample in Part A ( P1= 722 torr, V1 = 34.0 L) changes to 57.0 L, without a change in the temperature or moles of gas molecules, what is the new pressure, P2
What volume will 5.6 moles of Sulfur hexafluoride (SF6) gas occupy if the temperature and pressure of the gas are 128 deg C, and 9.4 atm
A reaction has a rate constant of 0.00704 sec-1, how long will it take (in minutes) until 0.212 mol/L of the compound is left, if there was 0.619 mol/L at the start
An acqueous solution of Kl has a freezing point of -1.80 C and an osmotic pressure of 26.0 atm at 25.0C. Assume Kl completely dissociates in water. What is the density of the solution
A 0.481 gram sample of an unknown acid (HX) required 28.95 mL of 0.2013 M NaOH for neutralization to a phenolphthalein endpoint. What is the molar mass of the acid
calculate the concentration of an NaOH solution if 25.0ml of the solution is needed to neutralize 17.5ml of a 0.419M HCL solution
Does nitro compounds cause any harmful effect on living things?
You have 75.0 mL of a 2.50 M solution of Na2CrO4(aq). You also have 125 mL of a 1.52 M solution of AgNO3(aq). Calculate the concentration of CrO4 2- after the two solutions are mixed together.
what is the percent yield if 4.65g of copper is produced when 1.87g of aluminum reacts with an excess of copperii
The following molecular equation represents the reaction that occurs when aqueous solutions of silver nitrate and calcium chloride are combined.
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