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If 5.23 moles of an ideal gas has a pressure of 4.03 atm, and a volume of 72.61L, what is the temperature of the sample. (Please write out the formula used completely)
Argon gas is 10 times denser than helium gas at the same temperature and pressure. Which gas is predicted to effuse faster. How much faster
Which of the following Bronsted-Lowry acids does NOT behave as a strong acid when it is dissolved in water. A) HBr B) HCl C) HNO2 D) HClO4
What is the major organic product formed when an ozonide is treated with dimethyl sulfide (CH3)2S formaldehyde, butanal, or dimethyl sulfoxide and why
Phosphorus pentachloride decomposes according to the chemical equation Kc=1.80@250C PCL5(g)<??>PCL3(g)+CL2(g) A 0.240 mol sample of PCl5(g) is injected into an empty 3.95 L reaction vessel hel
Draw the structure of the following three isomeric amides with chemical formula C6H11NO. Draw all three structures in the same window, DO NOT separate them with an arrow.
Name an element in the fourth period of the periodic table with a total of 4 4p electrons. Name an element in the fourth period of the periodic table with a total of 3 3d electrons Name an element i
A student places 2.0 moles of methylamine in 500ml of water. what is the pH? the Kb of methylamine is 4.4x10^-4.
The highest principle quantum number of period 3 elements is 4. 5. Period 3 elements have six 2p electrons. 6. The valence electrons of group 2A elements are in an s subshell. 7. The valence electro
Your lab partner is typically spot-on, but today they are having an awful day. Instead of using concentrated sulfuric acid in this exercise, they used concentrated hydrochloric acid.
What is the pH of a 2:1 mixture of H2PO4- to HPO42- at 0.005 M ionic strength. (See the table for the activity coefficients.)
If the ionization constant of water, Kw, at 40°C is 2.92 x 10-14, then what is the hydronium ion concentration and pH for an acidic solution
Show the electron configuration of phosphorus, P . Be sure to arrange the subshells in order of energy, with the lowest-energy subshell at the bottom and the highest-energy subshell at the top.
Calculate the volume of carbon dioxide at 20.0C and .950 atm produced from the complete combustion of 2.50 kg of methane. Compare your result with the volume of CO2 produced from the complete combus
A reaction has an activation energy of 110 kJ/mol and a rate constant, k=1.2 x 10^-12 s-1 at 0?C. At what temperature will the rate constant k=5.1 x 10^-7 s-1
An object has a mass of 6.85g. when placed in a graduated cylinder containing 25.0 ml of water, the water level increased to 28.8 ml. Calculate the density of the object
Use the van der waals equation and data in the text to calculate the pressure exerted by 18 gram of H2 at 20C in a 1.00L container. Repeat the calculation assuming that the gas behaves like an ideal
How to calculate the ratio of the masses of the buffer components required to make the buffer. m(NH3) / m(NH4Cl) ph= 9.00
Ions B and C react to form complex BC. If 20.0mL of 1.25M B is combined with 20.0mL of 1.25M C, 0.00650 mol of complex BC is formed. Determine the equilibrium constant for this reaction.
A 88.0-L sample of dry air is cooled from 135.9°C to 45.4°C while the pressure is maintained at 2.85 atm. What is the final volume in L. (Do not type the units.) the answer is 68.5 but using
Which of the following statement is true. and why. a. Exothermix processes decrease the enthrophy of the surroundings. b. Enthrophy is not temperature dependent
Calcium hydroxide reacts with carbon dioxide to form calcium carbonate. The reaction for this process is: Ca(OH)2(s) + CO2(g) ? CaCO3(s) + H2O(g), ?H = -69.1 kJ What is the enthalpy change if 380 g
A gas has a mass of 0.305 g, volume of 25 ml at 2 ATM and 0 degrees Celsius. The gas consists of bromine and fluorine. What is the molecular weight and the chemical formula
A mercury manometer is connected on one side to a bulb containing argon, while the other end is open to atmospheric pressure, which is 762 mmHg.
Balance the following ionic Lewis structures by placing the appropriate coefficients. Leave a target blank to indicate the absence of a coefficient.