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In a diagnostic test for leukemia, a person receives 3.8 mL of a solution containing selenium-75. If the activity of the selenium-75 is 43 μCi/mL , what dose, in microcuries, does the patient receive?
How much limestone in kg is need to completely neutralize a lake containing -- of H2 per liter? 5.0 * 10-3g SO4 5.2 * 10^9-L.
When 9 mL of a solution containing 2.5 M AlBr3 is diluted to 30 mL, a dilute solution is formed. What is the Br- concentration in 15 mL of the dilute solution?
You add an excess of Ca(OH)2 to water maintained at a particular temperature, stir until the solution is saturated, filter, then determine the [OH-] in the solution by titration with acid
You have at hand solid potassium hydroxide, sodium hydrogen carbonate, water, sand, and concentrated hydrochloric acid. Which of these should you sprinkle or pour onto the spill to neutralize it? Explain.
What are some examples of polymers made of amino acids? What are the two ways energy transfers between the system and its surrounding?
Write balanced net ionic equation for the reaction between hydrobromic acid and potassium hydroxide.
What is ?H in kJ for the combustion of 2.86 L of benzene producing CO2(g) and H2O? Assume that the heat of combustion of benzene is -4.18 x 103 kJ/mol. Enter your answer with three significant figures in exponential format (1.23 x 104 = 1.23E4).
Assuming the same amounts of potassium and water were used in each experiment, do you expect their observations about the products formed and reaction rate to be the same? Explain your answer.
Find the concentration of benzene in water (miligram/Liter) if the water is in equilibrium with a layer of oil containing 1%(mol) benzene. the solubility of benzene in water is 1.8 gram/Liter, the molecular weight of benzene is 78.11g/mol
suppose that 500 g of water vapor condense to make a cloud about the size of an average room. if we assume that the
The pH of a sodium acetate-acetic acid buffer is 5.30. Calculate the ratio [CH3COO-]/[CH3COOH].
Phosphoric acid is a weak triprotic acid with the formula H3PO4. If you have 50.0 mL of a 1.0 M solution of H3PO4, how many grams of NaOH (MM = 40.0g/mol) should you add to make a buffer with a pH of 7.00?
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