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A certain metal, M(s), reacts with O2(g) to form M3O4 (?H°f = -418 kJ/mol). What is ?H° in kJ for a reaction where 2.32 mol of M and excess oxygen form M3O4
Calculate Kp for the reaction 2NOCl(g) ->2NO(g) + Cl2(g) at 400degrees C if Kc at 400 degrees C for this reaction is 2.1 × 10-2
Five different substances are given to you to be dissolved in water. Which substances are most likely to undergo dissolution in water
Give two reasons why anhydrous conditions must be maintained during a Grignard synthesis. Write chemical reactions to explain
An oxide of copper is decomposed forming copper metal and oxygen gas. A 0.500 g sample of this oxide is decomposed, forming 0.444 g of copper metal. What is the empirical formula of the copper oxide
An analysis shows that 2.97 g of iron metal combines with oxygen to form 4.25 g of an oxide of iron. What is the empirical formula of the compound?
A galvanic cell is produced as follows: Left half-cell has a Pt wire dipping into a beaker containing an equimolar mixture of Cr+2 and Cr+3 . [Cr3+ + e-??Cr+2 E°-= -0.42 V] Right hand cell has a
Starting with 1.20 mL of an alcohol (MW 88, d = 0.8114 g/mL) and 3 mL of glacial acetic acid (MW 60, d=1.06 g/mL), calculate the theoretical yield in moles.
50 mL of 0.1200 M hydroxyacetic acid (pKa = 3.83) are titrated with 0.1280 M KOH. What is the pH after the addition of 48.6 mL of the base
Find q of a reaction. A cup calorimeter contains 50.0 mL of 0.500 M NaOH at 25C. Then 25.0 mL of .500 M HCl at 25 C is added. After reaction, the final temperature = 27.21 C. What is q in KJ. Given
The calorimeter temperature rises 0.42°C. The calorimeter and water have a combined heat capacity of 32.16 kJ/K. Calculate the heat of formation of ammonia, ?H°f, in kJ/mol. The formation re
According to Boyle's law, for a fixed quantity of gas at a given temperature, what quantity relating pressure and volume is constant
We did a lab on equilibrium and le chatelier's principle. On one portion, there was a copper complex, and we had to add different components to a solution and write down the changes that took place
Identify all the possible macrostate and the corresponding microstates in a system consisting of two communicating containers and four atoms
Rank the compounds(acetone,butane,acetic acid, 2-propanol, 2-methylpropane, 1-propanol) by vapor pressure, label the one that has the lowest vapor pressure and the one that has the highest.
A 0.1036 g sample containing only BaCl2 and NaCl is dissolved in 50 mL of distilled water. Titration with 0.07916 M AgNO3 requires 19.46 mL to reach the endpoint. What is the % by wt. of NaCl in the
What is the pressure in a 15.6L cylinder filled with 45.5g of oxygen gas at a temperature of 310K
Calculate the pH when 27.6 mL of 0.048 MHCl is added to 100.0 mL of the above buffer.
A 25.95 -g sample of methanol at 35.6°C is added to a 38.65-g sample of ethanol at 24.7°C in a constant pressure calorimeter. If the final temperature of the combined liquids is 28.5°C a
What are the annual CO2 emissions based on your vehicle use, vehicle's fuel consumption and a justified general combustion equation? Please use 10,000 miles as a reasonable estimate for annual vehic
A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared. Calculate the initial pH of this solution. The Ka for CH3COOH is 1.8 x 10-5 M. As usual, report pH to 2 decimal pl
It is quickly degraded in the atmosphere though reaction with OH• and O3 to form non volatile species which then form particles. These latter ones are responsible for the haze.
Consider the combustion of ethylene, C2H4(g) +3O2(g)---> 2CO2(g) + 2H2O(g). If the concentration of C2H4 is decreasing at the rate of 0.37M/s
Consider the combustion of ethylene, . If the concentration of is decreasing at the rate of 4.2×10?2 , what is the rate of change in the concentration of
bring 5ml of bromophenol blue to your work station. obtain a P20 Pipetman and record below the digits you see in the window on the side. What volume is the micropipette set to deliver