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5 g of octane are burned in a bomb calories meter containing 2.00 *10 2 g of H2O. How much energy is released if the water temp. increases 6 C?
how many grams of the above product must be used to absorb heat. The emt happy vaporization for ethanol is 850j/g and water is 2360kj
Suppose the current flowing from a battery is used to electroplate an object with silver. Calculate the mass (in grams) of silver the would be deposited by a battery that delivers 1.25 A/hr of charge.
what sequence of steps represents the best synthesis of 2-heptanol? a ch3ch2ch2mgbr 2 moles formaldehyde in diethyl
The abundance of deuterium in water is 0.0150%. Howmany moles of water would be required to obtain 0.0760 moles of deuterium
They sit next to each other and discuss chemistry. They argue over whose balloon has gas molecules zipping around at greater average velocities. Resolve the argument.
Calculate the pH of a solution that results from mixing 19.5 mL of 0.145 M HCN(aq) with 22.1 mL of 0.108 M NaCN. The Ka value for HCN is 4.9 x 10-10.
You have available at your lab bench a 0.1 M solution of TRIS in its protonated form, 0.1 M solutions of HCL and NaOH, and ample distilled water. Describe the preparation of a 1 L solution of 0.2 M TRIS buffer, pH 7.8
On explanation for the how ice skates work is that a thin film of liquid water is formed at the interface between the skate blade and the ice, creating a lubricating layer.Assuming that this is true, refer to the phase diagram to explain why this phe..
An emerald gemstone is an impure form of the mineral beryl, Be3Al2Si16O18. What is the percentage of silicon in the mineral?
Consider the unbalanced equation for the following reaction:
A certain compound is found to have the percent composition (by mass) of 85.63% C and 14.37% H. The molecular formula contains 3 carbon atoms. How many hydrogen atoms are contained in a molecular of this compound?
A room contains 12,000 ft.³ of air at 75°F and 29.7 inches Hg Absolute. The air has a dew point of 60°F. How many pounds of water vapor are in the air
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