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Several hundred pairs of sandals found in a cave in Oregon were found by C-14 dating to be 9.0 x 103 years old. What must have been the activity of the C-14 in the sandals in disintegrations per minute per gram? Assume the original activity was 15.3 disintegrations per minute per gram.
For a reaction at equilibrium, which of the following is the best way to think about it?
Determining the limiting reactant and mass of the product - which reactant is the limiting reactant? What mass of product may be produced?
Calculate the rate constant for the reaction when the reactant concentration in a first-order reaction is given 7.30×10-2M after 15.0s and it is also reported 4.40×10-3M after 65.0s . ?
How many liters of 13.5 molar HCl stock solution are needed to make 10.5 liters of a 1.8 molar HCl solution?
Magnesium oxide decomposes into magnesium and oxygen. If 12.09 of magnesium oxide decomposes to form 7.29 of magnesium, what mass of oxygen gas is also released in the reaction?
For a particular sample of copper, two peaks were obtained in the mass spectrum,showing an abundance of 69.10% at m/e 63 and 30.90% at m/e 65. Calculate the relative atomic mass of this sample of copper to three significant figures, using the data g..
In the neutralization reaction: HCl (aq) + NaOH (aq) = NaCl (aq) +H20, 25.0 mL of 0.212 M NaOH is neutralized by 13.6 mL of an HCl solution. The molarity of the HCl solution is ?
A gas at 39°C occupies a volume of 1.67 L. At what Celsius temperature will the volume increase to 2.12 L?
A gas-filled balloon having a volume of 2.50L and 1.2 atm and 25 Celsius is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23 Celsius and 3.00 x 10^-3 atm, respectively. Calcul..
A solution is prepared by dissolving 3.65 g of an unknown nonelectrolyte in 15.00 g of cylcohexane (tf = 6.6 oC and kf = 20.0 oC/m).
What is the pH of the solution resulting from the addition of 25.0 mL of .01M NaOH solution to 40.0 mL of .01M acetic acid
Strong, non-charged bases are useful in base-catalyzed reactions. Many non-charged nitrogen bases are commonly used in various reactions. Perhaps the strongest non-charged base is shown below
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