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Combustion is not always complete, usually because of an insufficient supply of oxygen. Describe a hypothesis, including a chemical equation, to explain the following events.
a. When ethyne (acetylene) is burned in air, black soot appears.
b. Deaths have occurred when charcoal briquettes (assume pure carbon) are burned inside a tent to keep campers warm on a cold night.
c. Deaths have occurred when people fall asleep in the back seat of a car that has a leaky muffler.
Question- NH3 is a weak base (Kb = 1.8x10^-5) and so the salt NH4Cl acts as a weak acid. 1) What is the pH of a solution that is 0.065 M in NH4Cl
A sample of nitrogen gas in a 1.60-L container exerts a pressure of 1.52 atm at 26 °C What is the pressure if the volume of the container
a .350 g sample of a biomolecule was dissolved in 15.0 g of chloroform and the freezing point depression was determined
Begin your explanation by identifying the intermolecular forces of attraction of the solute and the solvent.
Distinguish between electric potential energy and voltage. What are two things that are required for there to be a current in a circuit? How does joule heat vary with increasing and decreasing resistances? What is conventional current?
To a solution that is known to contain come of the soluble ions from group 1 and no other cations or inteferring substances, 12 drops of 6M hydrochloric acid is added and no precipoiate forms.To clear solution is evaporated to half its volume and ..
Aqueous potassium chloride will react with which one of the following in an exchange (metathesis) reaction
An electron is accelerated through an electric potential to a kinetic energy of 18.6 keV What is its characteristic wavelength?
Explain if an unknown gas takes 2.41 times longer to effuse than methane (CH4) then Define what is the molar mass of the unknown gas
Give the electron-domain and molecular geometries for the following molecules and ions (enter the appropriate number from thefollowing list).
In the citric acid cycle, how many net atp are generated between alpha-ketogluturate and malate
In a generic chemical reaction involving reactants A and B and products C and D, aA+bB→cC+dD, the standard enthalpy ΔH°rxn of the reaction is given by
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