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Polyethylene is a polymer consisting of only carbon and hydrogen. If 2.300 g of the polymer is burned in oxygen it produces 2.955 g H2O and 7.217 g CO2. What is the empirical formula of polyethylene? Please show step by step how you got this.
1) In mammals, which two molecules serve as a reservoir of amino groups in the body? What are they converted to/from as they receive or donate -NH2?
What two properties of ATP make it ideally useful for a form of energy storage in cells? Describe why the hydrolysis of ATP is highly exergonic (give at least two reasons).
The present maximum allowable concentration in laboratory air during an 8-hr workday is 1 ppb (parts per billion) by volume, which means that there is one mole of Ni(CO)4 for every 109 moles of gas. Assume 23?C and 1.00 atm pressure. What mass of ..
Guesstimate the extent of the dipole moment of H 2 O in Debye units, treating H 2 O as three point charges. suppose the O-H distance = 1.00 A, angle H-O-H =104°. The
An investigator is told that a closed vessel holds a pure rare gas. She measures the density of the gas in the vessel at 298K as well as 1atm pressure and finds it to be 0.8252g liter-1. Explain what gas does the investigator think is in the vessel
Titanium (work function = 6.94 x 10^-19 J) and silicon (work function = 7.24 x 10^-19 J) surfaces are irradiated with UV radiation with a wavelength of 250 nm. Which surface emits electrons with the longer wavelength
Consider the following equilibrium process at 686°C: CO2(g) + H2(g) CO(g) + H2O(g) The equilibrium concentrations of the reacting species are [CO] = 0.050 M, [H2] = 0.045 M, [CO2] = 0.086 M, and [H2O] = 0.040 M.
The absorbance of monensin, a UV-absorbing compound, is used to measure its concentration in a pharmaceutical preparation. Calculate concentration, and the uncertainty in concentration.
Find the molarity of the carbonate in the solution. A solution is prepared by dissolving 11.60g of a mixture of sodium carbonate and sodium bicarbonate in 1.00 L of water. A 300.0-cm^3 sample of the solution is then treated with excess HNO3 and boi..
The solubility of oxygen gas in water at 25 °C and 1.0 atm pressure of oxygen is 0.041 g/L The solubility of oxygen in water at 3.0 atm and 25 °C is __________ g/L.
Set up the relationship among the oxidative capacity of the heart muscle as well as the conversion of lactate that occurs there.
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 20.0 g of luminol to rm H_2O creating a solution with a total volume of 75.0 rm mL.
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