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A student used a 500-mL graduated cylinder to measure the volume of water in a 1-cup measure. Three trials of the measurement gave volumes of 240 mL, 242 mL, and 235 mL. What is the average of the three measurements? Were the measurements precise? Were they accurate? You may wish to refer to conversion factor tables to decide this. Justify your answers.
A cleaning solution is found to have a [OH-] = 3.2 x 10-12M. What is the [H3O+] and is the solution acidic or basic?
the atomic mass of chlorine is listed as 35.454 amu on the periodic table. it has two naturally occurring isotopes, Cl-35 and Cl-37. what are the approximate percentages of each?
two solutions initially at 24.60degc are mixed in a coffee cup calorimeter ccal 15.5 jdegc. when a 100.0 ml volume of
what volume of hydrochloric acid solution of 0.25 m must be diluted to prepare 1.00 l of 0.040 m hcl?a 3.0-l flask
For the following reaction, Kp = 1.16 at 800.°C. CaCO3(s) CaO (s) + CO2 (g) If a 25.0-g sample of CaCO3 is put into a 10.2-L container and heated to 800.°C, what percent of the CaCO3 will react to reach equilibrium? A) 23.7% B) 53.8% C) 13.4% D) 1..
What is the millimolar (mM) concentration of ethanol in the blood at this limit. The density of ethanol is 0.789 g/ml.
Identify the Lewis acid and Lewis base that lead to the formation of the following species: (a) AlCl4-, (b) Cd(CN)4 2-, (c) HCO3-, (d) H2SO4
The bold part is my question, as I believe the first part is already correct. Please provide an explanation. Solutions of Cu2+ turn litmus red because of equilibrium for which Ka=1.0e-8. Calculate the pH of 0.10 M Cu(NO3)2.
Naturally occurring iodine has an atomic mass of 126.9045. A 12.3849- sample of iodine is accidentally contaminated with 1.00070 of , a synthetic radioisotope of iodine used in the treatment of certain diseases of the thyroid gland.
if you burn 1.5 mol C3H8 according to the following reaction C3H8 +5O2 = 3CO2 + 4H2O how many grams of carbon dioxide are produced.
An unknown solution of ethanol was titrated with 25.0ml of .02M solution of potassium dichromate in sulfuric acid in sulfuric acid. Determine the mass (in grams) of ethanol in the unknown sample
What minimum mass of succimer in milligrams is needed to bind all of the lead in a patient's bloodstream. Assume that patient blood lead levels are 0.530 mg/L , that total blood volume is 5.0 L , and that 1 mol of succimer binds 1 mol of lead.
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