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Suppose that in an attempt tp minimize waste a laboratory teaching assistant decided to give each student only 1 ml of each liquid to use to measure density in an experiment;
Estimate the magnitude of the absolute error nad percent error in the measured sample volumes compare those errors to the erors that occur when measuring volumes of approimatley 8 ml as normally done in this experiment. Assume that the graduated cylinder used to measure al of the volumes has a 0.1 ml graduations.
then
Based on you answer you you be more or less confident about your density measurement if you used the smaller sample volume rahter than the normal 8-ml sample volume? Briefly explain
one cup is equivalent to 237 cm^3. In 1 cup of oil has a mass of 216 g. What is the density of olive oil in g/cm^3
The standard electrode potential for the reduction of Ni2+ to Ni is 0.25v. Would the potential of a nickel elctrode immersed in a 1.00M Naoh solution saturated with Ni(OH)2 be more negative than E Ni2+/NI or Less. Explain.
Many organic chemists when making a new solid compound often first try ethanol as a recrystallizing solvent. If soluable at room temperature, they simply add water and this often works! Why?
Alpha-linolenic acid is one of a large group of fatty acids that are found in fish oil, walnuts and canola seeds. These nutrients are essential for good health. All of these fatty acids consist of an unsaturated hydrocarbon that is terminated by a..
The total molarity of acid and conjugate base in this buffer is .100 M. A student adds 7.10 mL of a .250 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760
How many Sr2+ ions are in a mole of Sr3(PO4)2? Also, how many PO43- ions are in a mole of Sr3(PO4)2?
A chemical reaction has ?G° = 10.0 kJ and ?S° = 50.0 J/K. Calculate ?H° for this reaction at 25°C. Could this reaction ever be spontaneous? Explain your answer please.
Calculate the freezing point and boiling point of the solution. Kf benzene = 5.12 C/m Kb = 2.53 C/m
How abundant are tryptophan and cysteine in proteins and what characteristics of these amino acids affect their abundance in proteins
A 24.9 mL volule of nitric acid reacts completely with 55.0 mL of aqueous sodium sulfide. The Reaction is 2 HNO3 (aq) + Na2S (aq) --> H2S (g) + 2 NaNO3 (aq) The volume of H2S(g) formed is 141 mL at 27*C and 735 mmHg. Determine the molarity of the n..
A solution of potassium permanganate is treated with an excess of strong acid. What is the formula and systemic name of the strong acid product
Calculate the experimental percent by mass of copper in the sample and the theoretical mass percent of copper in copper (II) acetate monohydrate.
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