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Problem- The accepted value for the density of a certain liquid is 1.09 g/mL. A student obtains an average density of 1.12 g/mL. What is the relative percent error in the student's value? Do not comprise the percent sign in your answer. Express your respond to two decimal places.
A 2.721 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution.
Question- A perfect carnot heat engine absorbs heat q from a hot reservoir at 127 degrees calvin and exhauts heat to a cold reservoir at 27 degrees calvin. How much heat is exhausted to the cold reservoir
The pH of an aqueous solution containing only a monoprotic weak acid has a pH of 4.1. What is the concentration of hydronium ion, H3O+, in the solution? (a)2 x 10?3 M (b)2 x 10?4 M (c)8 x 10?4 M (d)8 x 10?5 M (e)0.61 M
air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which
Calculate the activation energy for creep for a low carbon-nickel alloy having steady state creep behavior. Using the data under a constant load:
Calculate the reaction Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g) What mass of ZnCl2 (MW = 136.3 g/mol) can be prepared from the reaction of 3.27 grams of zinc
Explain A distillate was collected between 78-82 degrees C at sea level. Define the reported boiling point was 80 degrees C. State on the correctness of this report.
What is the theoretical yield (in grams) of the precipitate when 22.2 g of iron(II) chloride reacts in solution with 10.91 g sodium hydroxide
The degree of unsaturation, or index of hydrogen deficiency, is the number of pi bonds plus rings in a molecule. Specify the degree of unsaturation (index of hydrogen deficiency) of the following formulas
How many moles of CF4 can be produced when 4.00 mol C react with 12.00 mol F2?
for the first irder reaction 2n2o5 --gt 2n2 o4 o2 at a particular temperature the half - life of n2o5 is 0.90 hr .
She pours a 50.0mL sample of water at 345K into the calorimeter containing a 50.0mL sample of water at 298K. She carefully records the final temperature as 317K. Explain what is the value of Ccal for the calorimeter
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