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How much potential energy is required to lift a 50 gram arrow to a height of 100 meters?
Calculate the change in entropy when 5.0g of water at 75.2 degrees Celsius is converted to ice at -5.5 degrees Celsius. During the process the pressure remains constant at 1.00 atm.
How many grams of sodium sulfide are formed if 1.60 g of hydrogen sulfide is bubbled into a solution containing 2.13 g of sodium hydroxide, assuming that the sodium sulfide is made in 94.0 % yield?
Describe the impact of time of exposure on the amount of radiation you receive. If you are exposed for three times as long do you feel 1/3 the amount of radiation, three times the amount of radiation
Determine the correct formula for this compound; use the "rule of 13" and substitute in O's and N's to generate the possible formulas (ie do not simply use online software to do this problem).
How many formula units make up 26.2 g of magnesium chloride (MgCl_2)?
Draw the missing intermediate and add curved arrows for the production of phenylethyne by the double dehydrohalogenation
A chemist needs to determine the concentration of a solution of nitric acid, HNO3 . She puts 725 mL of the acid in a flask along with a few drops of indicator. She then slowly adds 0.400 M Ba(OH)2 to the flask until the solution turns pink, indica..
determine the density in gml of a 0.70 g sample of oxygen gas that occupies 5.0l. compare the density of oxygen gas to
calculate the molar mass of a sample if a simgle molecule weighs 8.90 x 10-23
Molecular chlorine, Cl2, is a green gas. Sketch a few of the rotational, vibrational, and electronic energy levels of Cl2 on the same diagram to relative scale.
If a breath of air, with a volume of 0.50 L, is drawn into the lungs and comes to thermal equilibrium with the body at 37°C while the pressure remains constant, calculate the increase in enthalpy of the air if the initial air temperature is 20 °C ..
State the balanced oxidation as well as reduction half reactions for the reaction of ceric and ferrous ion. Explain what ion is oxidized and what ion is reduced
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