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Cyclopropane is converted to propene in a first-order process. The rate constant is 5.4 x 10-2 hr -1. If the initial concentration of cyclopropane is 0.150 M, what will its concentration be after 22
A solution is 0.10 M NH4Cl. What is the pH of this solution?
How many years are required for a "chunk" of thermally insulated granite to increase in temperature by 400°C.The specific heat capacity of granite is 800J/Kg°C.
A buffer contains 0.40M base, B, and 0.25M of its conjugate acid, BH+, and has a pH = 8.88. What is the pH after 0.0020mol of HCl is added to 0.25L of this solution? (assume HCl adds no volume to th
Devise a reaction scheme to make ethanol from propanoic acid. Several steps may be required. For each reaction include any reagents/catalysts and reaction conditions.
Write a reaction mechanism to show how propanoyl chloride is converted to propanamide using ammonia. Show how the diazonium ion in i) can couple with phenol to form the azo compound.
Calculate the pressure (in atm) of 16.80 mol of CO2 gas in a 3.00 L vessel at 153 K with: (a) the ideal gas law
Nucleophilic substitution reactions: an example of an SN1 and an SN2 including the stereochemical consequences. Mark on your reaction scheme which is SN1 and which is SN2.
Explain how the haloform reaction can be used to distinguish between butan-2-one and propanal. Include a reaction mechanism for any reaction which occurs.
Calculate the pH of a solution prepared by mixing 250. mL of 0.174 m aqueous HF (density = 1.10 g/mL) with 38.7 g of an aqueous solution that is 1.50% NaOH by mass (density = 1.02 g/mL).
Write balanced equations to show how ethyl ethanoate can be made from a) acid halide and b) an acid anhydride.
Question: In a reaction, 34.6 g of chromium(III) oxide reacts with 12.3 g of aluminum to produce chromium and aluminum oxide. If 23.7 g of chromium is produced, what mass of aluminum oxide is produc
The decomposition of dinitrogen pentaoxide has and activation energy of 102 kj/mol and delta H degree rsn = + 55 kj/mol. What is the activation energy for the reverse reaction?
What is the density of a gas in g/L that has a molecular weight of 144, if the temperature and pressure is 25 degree C and 750 mmHg?
Calculate the pH of a buffer solution which contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (NaC6H5CO2). Given Ka = 6.5 x 10^-5
Question: A 0.1391 g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter contains exactly 281 g of water, and the tem
Write equations describing the preparation of three isomeric primary alcohols of molecular formula C5H12O from alkenes.
A 125-g metal block at a temperature of 93.2 °C was immersed in 100. g of water at 18.3 °C. Given the specific heat of the metal (s= 0.900 J/g·°C), find the final temperature of t
Draw an electron-dot structure for Acetonitrile, C2H3N, which contains a carbon-nitrogen triple bond. How many electrons does the nitrogen atom have in its outer shell? How many are bonding, and how
Draw a three-dimensional representation of the oxygen-bearing carbons atom in ethanol, CH3CH2OH, using the standard convention of solid, wedged, and dashed lines.
Although pyrrole is a much weaker base than most other amines, it is a much stronger acid (pKa ≈ 15 for the pyrrole versus 35 for diethyl amine). The N-H proton is readily abstracted by base t
Phytane is a naturally occurring alkane produced by the alga Spirogyra and is a constituent of petroleum. The IUPAC name for phytane is 2, 6, 10, 14-tetramethylhexadecane. Write a structural formula
What is the difference between longitudinal and transverse waves, provide an example of each. Explain why sound waves cannot travel in a vacuum but light can.
Which two of the following are able to be calculated, based on the data provided. Perform the calculation of the two wave characteristics and explain why it is not possible to calculate the third.
Explain what is meant by the terms hydrostatic pressure and hydrodynamic pressure? Which of these terms can be used when discussing cardiac output?