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Question- What is the final temperature in a squeezed cold pack that contains 48.5g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/(g??C) for the solution, an initial temperature of 28.0?C, and no heat transfer between the cold pack and the environment.
Solve the above problem in detail no word count
Then 2.00 mL of solution containing 0.0156 M dopamine was mixed with 90.0 mL of unknown, and the mixture was diluted to 100.0 mL in volumetric flask. The signal from the new solution was 58.4 nA. What is the dopamine concentration in the unknown s..
35 mL air sample collected at 31 C has a pressure of 575 torr. What pressure will the air exert if it is allowed to expand to 476 mL at 56 ? C? Answer in units of torr.
Chlorine gas was bubbled through a 100mL sample of a .356 M NaI solution until the reaction was complete. How many moles of molecular iodine were produced
What is the final temperature (in oC) of a 37.6 g sample of graphite (specific heat = 0.720 J/(g K)) which absorbs 9.82 kJ of heat when it warms from 12.56oC
She weighed an empty 4.3 L bulb, then filled it with the gas at 1.60atm and 23.0 C and weighed it again. The difference in mass was 7.9g . Identify the gas.
a rigid container is filled with liquid acetone at 20 degrees C and 1 bar. through heat transfer at constant volume, a pressure of 100 bar is generated
The second order reaction for the breakdown of nitric oxide to its elements has the rate constants of 0.0796 L/mol-s at 737 C and 0.0815 L/mol-s at 947 C. What is the activation energy of this reaction?
suppose that coal of density 1.5 gcm3 is pure carbon. it is in fact much more com- plicated but this is a reasonable
How many mL of .200 M FeCl3 are needed to react with an excess of Na2S to produce 2.75 g of Fe2S3 if the percent yield for the reaction is 65%? 3Na2S + 2FeCl3 = Fe2S3 + 6NaCl
What is the activity coefficient of H in a solution containing 0.020 M HCl and 0.010 M Ca(ClO4)2? What is the pH of this solution
If the titrant has a molarity of 0.2750 M and there are 40.00 mL of analyte present, what is the molarity of the analyte?
how does a large electronegativity difference affect molecular properties?1. it makes the bonds stronger and shorter
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