Concept explainers
(a)
Interpretation:
The units of
Concept introduction:
The volume of an eggplant is described as,
It is assumed that the given equation is valid and therefore dimensionally homogeneous. So, the dimension of the left hand side and right hand side of the equation is equal. In addition, the exp() component is dimensionless.
(b)
Interpretation:
The two coordinates of plot, the slope and intercept of the plot should be determined.
Concept introduction:
The volume of an eggplant is described as,
(c)
Interpretation:
The formula in SI units should be calculated.
Concept introduction:
The volume of an eggplant is described as,
It is given that,
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Chapter 2 Solutions
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
- We want to determine the purity of alum sample bought in a local pharmacy in Miagao. A Chem 28 student determined the purity gravimetrically of a sample of alum, K2SO4:Al2(SO4)3:24H20. A 1.5879-g sample was dissolved and the aluminum precipitated as Al(OH)3. The precipitate was collected by filtration, washed, and ignited to give a product Al203 weighing 0.1572 g. Show your calculation to determine the purity of the alum sample.arrow_forwardYou are checking the accuracy of a volumetric flask marked 10.00 mL. To Measurement Volume (mL) calculate the volume of water contained in the flask, you first measure the mass 1 10.047 of the empty flask and the mass of the flask filled with water and take the 10.052 difference. Then, you correct for the buoyancy factor and divide by the density of 3 10.022 the water. The result of 8 such measurements is given in the table. 4 10.047 Calculate the mean and the 95% confidence interval for these measurements. 5 10.024 10.016 7 10.065 8 10.024 mean: mL 95% confidence interval: + mL Can you, with 95% confidence, say that the nominal value of 10.00 mL can be the true volume of the flask? no yesarrow_forwardFor the chemical reaction 2HBr(aq)+Ba(OH)2(aq)⟶2H2O(l)+BaBr2(aq)2HBr(aq)+Ba(OH)2(aq)⟶2H2O(l)+BaBr2(aq) write the net ionic equation, including the phases.arrow_forward
- The molar volumes of pure acetone and pure chloroform at room temperature are 72.0 cm^3 and 81.0 cm^3, respectively. The volume of a liquid mixture containing 0.6 moles of acetone and 0.5 moles of chloroform isarrow_forwardThe solubility of AgCl in water at 25 °C is measured to be 0.0019 Round your answer to 2 significant digits. x10 X 5 Use this information to calculate Ksp for AgCl.arrow_forward20.00g of sodium hydroxide are placed in a volumetric flask and the solution made up to 250 cm3 with water. What is the concentration of the solution in moles per cubic decimetre (moldm-3)?arrow_forward
- pneumonia is characterized by fever (a body temperature) does the patient have a body temperturr that indicates that he has pneumonia? justify your answer with suitable caculation PLEASE.arrow_forwardAn environmental chemist working for the Environmental Protection Agency (EPA) was directed to collect razor clams from a heavily-contaminated river superfund site and analyze them for their Ca+ content using graphite furnace atomic absorption spectrometry (GFAAS). The chemist dried the clams at 95 °C overnight and ground them in a scientific blender, resulting in approximately 50 g of homogenized dry weight. A representative 91.79 mg sample was taken from the approximately 50 g of dry material and dissolved in 100.0 ml. of 0.1 M HCI to create a sample solution. Using the method of standard additions, the chemist prepared five standard solutions in 100.0 ml volumetric flasks, cach containing 5.00 ml. aliquots of the sample solution. Varying amounts of a 85.0 ppb (ug/L) Cd+ standard were added to each of the flasks, which were then brought to volume with 0.1 M HCI. The Cd content of the solutions was then analyzed using GFAAS, resulting in the absorbance data given in the table. TTI…arrow_forward25.0mL of a 0.515 M K2S solution is mixed with 30.0 mL of 0.833 M HNO3 acid solution to give the following reaction: K2S(aq) + 2HNO3(aq) → 2KNO3(aq) + H2S(g) H2S is an unwanted by-product in a pulp and paper industry. To capture H2S gas, it is bubbled through a NaOH solution to produce Na2S with a yield of 94%. H2S(g) + 2NaOH (aq) → Na2S (aq) + 2H2O(l) The mass of H2S(g) that was processed (in kg) if 10.76 kg of Na2S was collected isarrow_forward
- 2KMnO4 (aq) +5H2C2O4 (aq) + 3H2SO4 (aq) > 10CO2 (g) + K2SO4 (aq) +2MnSO4 (aq) + 8H2O (l) 90ml of 0.0150 M KMnO4 solution is mixed with 30 ml of 0.095 M H2C2O4 solution in a medium where there is excess sulfuric acid. Assume 100% yield Calculate the concentration of the following ions or molecules in the final solution a) Mn2+ b) K+ c) MnO4- d)H2C2O4arrow_forwardAccording to the ideal gas law, the pressure, temperature, and volume kT where k is a constant of V' of a gas are related by P proportionality. Suppose that V is measured in cubic inches (in³), T is measured in kelvins (K), and that for a certain gas the constant of proportionality is k = 5 (in · lb)/K. NOTE: Enter the eract answers. (a) Find the instantaneous rate of change of pressure with respect to temperature if the temperature is 44 K and the volume remains fixed at 20 in³. ] lb/(in²K) (b) Find the instantaneous rate of change of volume with respect to pressure if the volume is 20 in³ and the temperature remains fixed at 44 K. in /lbarrow_forwardCH₂-COOH Citric acid has the formula HO-C-COOH I CH₂-COOH CH2–CDD - Na* + HD-C-CDD- Na CH₂-COO- COO-Na A 25.0 mL sample of a concentrated citrus fruit cordial component (e.g. for lime juice), used in the food & drinks industry, was diluted to 250 mL in a graduated volumetric flask. A 25.0 mL sample of this diluted solution, required, on average, 22.5 mL of a standard 0.100 molar sodium hydroxide solution using phenolphthalein indicator for the titration end-point. A) 0.0075 Assuming all the acid in the cordial was citric acid, calculate the concentration of the acid in g/mL in the original solution. B) 0.576 D and is tribasic acid, forming the tri-sodium salt on complete neutralisation with sodium hydroxide. 1.44 0.00225arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning