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56.3 g of calcium chloride is dissolved in enough water to give 400 mL of solution. What is the molarity of the solution?
What is the concentration of each ion?
How many moles of calcium chloride in 850 mL of 1.27 calcium chloride?
What volume of 1.27 M calcium chloride is needed if we require 4.30 moles of chloride ion?
Find out the mass of the copper that was removed from the penny. Presuming excess nitric acid, computing the grams of copper (II) nitrate that must have formed in the reaction
An additional atm pressure of HI is admitted to the con- tainer, and it is allowed to come to equilib- rium again. What is the new partial pressure of HI?
Problem- Draw the structure of the major organic product you would expect from the reaction of 1-bromopropane with NaI.
An unknown foul smelling hydrocarbon gives the mass spectrum and infrared spectrum with a major fragment at 39, 67, 81, and 95. propose structures for the major fragments
When 2.00 g of hydrazine (N2H4) decomposed under constant-pressure conditions, 7.00 kJ of heat were transferred to the surroundings. What is pH for the following reaction? 3 N2H4(l) --> 4 NH3(g) + N2(g)
If 62.0 mL of H2 and 62.0 mL of ethylene (C2H4) are allowed to react at 1.5 atm, the product ethane (C2H6) has a volume of 62.0 mL. Calculate the amount of PV work done, and tell the direction of the energy flow. C2H4(g) + H2(g) --> C2H6(g)
Explain when heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction CaCO3(s)?CaO(s)+CO2(g)
Why do you think the enthalpy of activation, (REFER TO THE PICTURE), for a syn-periplanar elimination is higher than that for an anti-periplanar elimination
a coffee contains 100 mL of H2O. initial temperature of calorimeter is temperature 23 C.if 8.20 g of CaCl2 is added to calorimeter. what will be the final temperature of the solution in the calorimeter.
Calculate the molar mass of naphthalene, the organic compound in mothballs, if a solution prepared by disovlving 7.50g of naphthalene in exactly 150g of benzene has a freazing point 2.0 degrees
Pick and element or compound and state how many grams of that substance are needed to have a mole of that substance.
A 0.2436 gram sample of an unknown substance was dissolved in 20.0 mL of cyclohexane. The density of cyclohexane is 0.779 g/mL. The freezing-point depression was 2.5 degrees Celsius. Calculate the molar mass of the unknown substance.
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