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The temperature of a calorimeter has been increased by 12.3 K as a result of a certain chemical reaction. An electrical heater operating for 320 s at a voltage of 12 V and a current of 4.3 A in the same calorimeter elevated the temperature by 22.4 K. Calculate the heat capacity of the calorimeter and amount of heat released by the chemical reaction.
What is the change in air temperature(, assuming the heat from the steam is all absorbed by air)
Calculate the pH of the 0.39M NH3/ 0.73M NH4CL buffer system . B) what is the pH after the addition of 20.0 mL of 0.075M NaOH
Determining Copper in Brass, 1st I titrated Na2S2O3 and determined the molarity to be 0.164. I am having trouble with the calculations for the dissolution of brass.
The excess EDTA was then back-titrated, requiring 5.00 mL of 0.050 0 M Zn2. What was the concentration of Ni2 in the original solution?
Using complete sentences, respond to questions 1-5 using the equation below. Be sure to explain your reasoning.
The density of lead is 11.3 g/mL. The water level in a graduated cylinder initially at 216 mL rises to 292 mL after a piece of lead is submerged. What is the mass in grams of the lead?
The titration is monitored with a potentiometer using a SCE reference electrode (Eref= 0.241V). the solution is buffered at ph=4.00.
How do you calculate the number of moles of all sulutes (including cations and anions): Please show how to solve the problem.
Consider a lithium nucleus, of charge +3q Calculate the first three electron energies for an electron in Li++ ion
A piece of a newly synthesized material of mass 25.0 g at 80.0C is placed in a calorimeter containing 100.0 g of water at 20.0C. If the final temperature of the system is 24 0C
Compute the changes in the degree of polymerisation and the rate of the polymerisation caused by raising the temperature of polymerisation of styrene in C6H6, initiated by azobisisobutyronitrile from 60 0C to 70 0C.
The density of an unknown substance was determined by adding a weighed piece to a graduated cylinder containing 37.3 mL of water. After the substance was submerged the water level was measured at 46.2 mL. The substance weighed 100.0 g. What was it..
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