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Question- When a 8.00-g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of 2.676 kJ•K-1, the temperature decreases by 0.500 K. Calculate the molar heat of solution of KBr.
I want to know how this is done please show all steps in detail
A zero-order reaction has a constant rate of 3.50×10-4 M/rm s. If after 65.0 seconds the concentration has dropped to 1.00×10-2 M, what was the initial concentration?
A particular method is to be used to analyze an ore that contains 4.8% copper. What minimum sample weight should be taken if the relative error due to a 0.5 mg loss is to be smaller than .1%
3.64 g of calcium hydroxide react with excess sodium sulfate in aqueous solution to produce solid sulfate and aqueous sodium hydroxide. How many moles of calcium atoms are reacting ?
Problem- A current of 4.73 A is pass through a Pb(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 6.80 g of lead
Problem- A glass column is filled with mercury and inverted in a pool of mercury. The mercury column stabilizes at a height of 729 mm above the pool of mercury. What is the pressure of the atmosphere
You are given the chemical reaction: 4AsF3 + 3C2Cl6 -> 4AsCl3 + 3C2Cl2F4.If 1.3618 moles of AsF3 are allowed to react with 1.000 mole of C2Cl6.
During a fire, it was expected by the fire department report that the tank temperature rose to 365 degrees Fahrenheit. Find out the pressure of the oxygen gas in the tank during the fire.
Problem- Conjugated proteins contain chemical substituents in addition to amino acids. List three classes of conjugated proteins and identify the type of prosthetic group associated with each one.
An analysis of nicotine (MW=162 g/mol) gives 74.0% carbon, 8.65% hydrogen, and 17.3 nitrogen. What is the true Molecular formula for nicotine?
A mixture of 8.0mol of H2 (g) and 4.0mol of O2 (g) is placed in a sealed evacuated container made of a perfect insulating material at 28 degrees C. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the..
a bent molecule a methyl azide has the formula ch3n3 the figure on the right shows how the atoms are connected but not
The value of the equilibrium constant for the reaction: 2 HBr(g) H2(g) + Br2(g) is Kc = 1.26 x 10-12 at 500 K.
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