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Gold has a face-centered cubic structure and has a density of 19.3 g/cm3. What is its atomic radius?
If a stream of N2O is passed through a tube 30mm in diameter and 25cm long at a flow rate of 0.7L/min, at what temperature should the tube be maintained to have a partial pressure of 1.0mm of O2 in
at what temperature should the tube be maintained to have a partial pressure of 1.0mm of O2 in the exit gas? Assume that the total pressure of the gas in the tube is 1.30atm.
Calculate the density of a solution if the following data has been recorded during a lab experiment
Describe what happen to the density of liquid water when its temperature is increased and/or decreased. properly cite your reference source(s) for this information
Explain and calculate the mass of solution in a pipette if the following data has been recorded during a lab experiment
If the weight of the gas in the bulb is 0.3554 g, what is the mole percent of butane in the mixture. Set up two equations to solve simultaneously for the two unknowns, the moles of ethane and butane
55.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139 mL portion of that solution is diluted using 175 mL of water. What is the final concentration
A gas sample is known to be a mixture of ethane and butane. A bulb having a 230.0-cm3 capacity is filled with the gas to a pressure of 97.5 × 103 Pa at 23.1oC. If the weight of the gas in the
What is the final volume of the balloon. Assume that the pressure inside and outside the balloon has the same value. Ans. V = 34.8 L
Assume that the ideal gas law is valid, with T=t(celcius)+a, and that the values of R and a are not known. Determine R and a from the measurements provided.
Yeast and other organisms can convert glucose (c6h12o6) to ethanol (ch3ch2oh) by a process called alchoholic fermentation. The net reaction is
Explain in terms of noncovalent interactions why water and ethanol are miscible, but water and cyclohexane are not.
Which of the following pairs has the member with the greater molar entropy listed first. All systems are at 25°C
An important step in the synthesis of nitric acid is the conversion of ammonia to nitric oxide. H° f [NH3(g)] = -45.9 kJ/mol; H° f [NO(g)] = 90.3 kJ/mol; H°f[H2O(g)] = -241.8 kJ/mol
In an endothermic reaction, in going from the reactants to the products at the same temperature, the value of q is negative.
A system that had work done on it but which receives or loses no heat from or to the surroundings has
Gold has a face-centered cubic structure and has a density of 19.3 g/cm3. What is its atomic radius
Which compounds are completely water soluble. Which compounds are insoluble in water.
When benzoic acid reacts with sodium hydroxide, what happens to the covalent molecule
What principle explains the solubility of a substance in aqueous acid or aqueous base
What is the important component in 1.0 M NaOH? What is the important component in 1.0 M HCl
How do intermolecular attractions influence the solubility of a solute in a particular solvent
Calculate the surface area for a 35.0mg sample of this material. 3. A 10.0-mL sample of contaminated water had 7.748mg of mercury in it. After treatment with 10.0mg of the new spongy material, 0.001
Calculate the number of grams of sulfuric acid in 1 gallon of battery acid if the solution has a density of 1.28 g/mL and is 38.0% sulfuric acid by mass.