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what is the concentration of a solution with a volume of 3.3ml that contains 12 grams of ammonium sulfite((NN4)2SO3)
If the true concentration of CaCO, in the drinking water described in Problem 3-10 is 225.9 ppm, calculate the absolute and parts per thousand error.
An alloy from the National Bureau of Standards was analyzed for its chromium content and the following results were obtained: 2.61, 2.66, 2.61, 2.70, and 2.68% Cr. If the NBS certified value is 2.69% Cr, what is the absolute error? What is the percent error?
To deliver a certain volume from a baret requires two readings: initial and final. If each reading is made with an uncertainty of 10.02 ml, what is the relative uncertainty in dis pensing 30.00 ml. from a buret?
Find the resulting temperature when 100 g of ice at 0oC is mixed with 1 liter of H2O at 35oC.
Characterization of elements according to periodic table
Example., P-phosphorus, period-5, group-15 or Va; atomic number Z=15, number of protons P=15, number of electrons e=15; relative atomic mass Ar=31; nonmetal
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A glucose solution is frequently used as an intravenous (IV) solution to supply hydration and/or nutrition. Calculate amounts of glucose provided and volumes used.
A patient received 2.05 L of a 0.278 M glucose IV solution.
What quantity in moles of glucose were administered to the patient?
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Student A investigated the rate of reaction between calcium carbonate (marble chips) and hydrochloric acid. The student collected 10.0 cm3 of gas produced after 15 seconds.Student B investigated the rate of reaction between magnesium and hydrochloric acid. The student collected 19.5 cm3 of gas produced after 10 seconds.Which student’s investigation had a faster rate of reaction?
Which of the following statements are INCORRECT?
a.
In a bond, A-Y, the electronegativity difference between of two atoms determine how the A-Y bond breaks.
b.
If the atoms, A and Y, in the compound, AY, has electronegativity values that are almost the same, then the A-Y bond is polar.
c.
The electronegativity of elements on the periodic table increases going from left to the right in each row.
d.
Electronegativity is the property of the atoms forming a given bond, which determines the polarity of the bond.
