Chemistry concepts and calculations
117302 questions • Page 75 / 2347
1) What is the concentration of acetic acid in the 0.100M pH 5.000 buffered solu
1) What is the concentration of acetic acid in the 0.100M pH 5.000 buffered solution? Note 1: Based on the notation you use, you may write that the acetic acid concentration as ei…
1) What is the concentration of iron ions (in M) in a 5.16 M solution of Fe3(PO4
1) What is the concentration of iron ions (in M) in a 5.16 M solution of Fe3(PO4)2? 2) Assuming volumes are additive, how much water (in mL) should be added to 31.7 mL of a 1.16 M…
1) What is the conjugate acid of HS - ? - S- - H2S - H2S- - S2- 2) What is the c
1) What is the conjugate acid of HS-? - S- - H2S - H2S- - S2- 2) What is the conjugate base of HS-? - H2S- - S- - S2- - H2S 3) Match the following bases with the correct conjugate…
1) What is the corrected pressure of the dry oxygen gas? 2) What is the volume i
1) What is the corrected pressure of the dry oxygen gas? 2) What is the volume in mL, of the dry oxygen gas at STP conditions? 3) How many molecules of oxygen were collected? 4) w…
1) What is the definition of the Enthalpy of Reaction? A) The amount of heat in
1) What is the definition of the Enthalpy of Reaction? A) The amount of heat in Joules require to evaporate 1 mole of reactant. B) The amount of energy released from gaseous expan…
1) What is the definition of the Enthalpy of Reaction? A) The amount of heat in
1) What is the definition of the Enthalpy of Reaction? A) The amount of heat in Joules require to evaporate 1 mole of reactant. B) The amount of energy released from gaseous expan…
1) What is the definition of the Enthalpy of Reaction? A) The amount of heat in
1) What is the definition of the Enthalpy of Reaction? A) The amount of heat in kJ released (exothermic) or gained (andothermic) per mole of product. B) The amount of heat in Joul…
1) What is the definition of the Enthalpy of Reaction? A) The amount of heat in
1) What is the definition of the Enthalpy of Reaction? A) The amount of heat in kJ released (exothermic) or gained (andothermic) per mole of product. B) The amount of heat in Joul…
1) What is the density of a block of unknown material with a mass of 10.00-g if
1) What is the density of a block of unknown material with a mass of 10.00-g if the dimensions are: length = 2.2 cm height = 1.7 cm width = 2.2 cm 2) What is the density of a 17.2…
1) What is the difference between solubility and Ksp? 2)How many moles of calciu
1) What is the difference between solubility and Ksp? 2)How many moles of calcium nitrate are in 15.0 mL of 0.200 M calcium nitrate? 3) How many moles of potassium hydroxide are i…
1) What is the electrophile in the following reaction? 2) Rank the following sub
1) What is the electrophile in the following reaction? 2) Rank the following substrates from most to least reactive in an SN1 reaction. 3) Which reagents would you use for the fol…
1) What is the enthalpy change (in kJ) for burning 73.0 g of methyl alcohol? 2)A
1) What is the enthalpy change (in kJ) for burning 73.0 g of methyl alcohol? 2)A reaction that is used to propel rockets is N2O4(l) + 2N2H4(l) --> 3N2(g) + 4H2O(g). This reacti…
1) What is the enthalpy change (in kJ) for burning 73.0 g of methyl alcohol? 2)A
1) What is the enthalpy change (in kJ) for burning 73.0 g of methyl alcohol? 2)A reaction that is used to propel rockets is N2O4(l) + 2N2H4(l) --> 3N2(g) + 4H2O(g). This reacti…
1) What is the equilibrium partial pressure of water vapor above a mixture of 62
1) What is the equilibrium partial pressure of water vapor above a mixture of 62.2 g H2O and 35.2 g HOCH2CH2OH at 55 °C. The partial pressure of pure water at 55.0 °C is 118.0 mm …
1) What is the final temperature when heat of 1100kJ is added to 30moles of SO2
1) What is the final temperature when heat of 1100kJ is added to 30moles of SO2 initially at 300 Celsius in a steady flow heat exchanger at atmospheric pressure 2)One (1) mol of P…
1) What is the formula for potassium diamminetetrachlorovanadate(III)? a) [KV(NH
1)What is the formula for potassium diamminetetrachlorovanadate(III)? a) [KV(NH3)2Cl4] b) K2[V(NH3)2Cl4] c) K[V(NH3)2Cl4] d)[KV(NH3)2]Cl4 e)K[V(NH3)2]Cl4 2. The effective atomic n…
1) What is the hybridization of the oxygen atom in furan? a) sp b) sp 2 c) sp 3
1) What is the hybridization of the oxygen atom in furan? a) sp b) sp2 c) sp3 d) p 2) Which aryl halide reacts the fastest with aqueous NaOH? 3) Which of these reactions is lik…
1) What is the hydroxide ion concentration, [OH?], at the equivalence point when
1) What is the hydroxide ion concentration, [OH?], at the equivalence point when 20.0 mL of 0.100 M HNO2 is titrated with 0.100 M NaOH? The Ka for HNO2 is 4.5
1) What is the hydroxide ion concentration, [OH?], at the equivalence point when
1) What is the hydroxide ion concentration, [OH?], at the equivalence point when 20.0 mL of 0.100 M HNO2 is titrated with 0.100 M NaOH? The Ka for HNO2 is 4.5
1) What is the mRNA sequence for the following segment of DNA: --AAATGTGTGCTAACA
1) What is the mRNA sequence for the following segment of DNA: --AAATGTGTGCTAACA-- ? Based upon the mRNA sequence, what is the peptide sequence? 2) What is the volume percent of a…
1) What is the mRNA sequence for the following segment of DNA: --AAATGTGTGCTAACA
1) What is the mRNA sequence for the following segment of DNA: --AAATGTGTGCTAACA-- ? Based upon the mRNA sequence, what is the peptide sequence? 2) What is the volume percent of a…
1) What is the magnitude of the energy of a bond formed between a potassium (K+)
1) What is the magnitude of the energy of a bond formed between a potassium (K+) cation and an iodide (I-) anion? The ionic radii of K+ and I-?, are 152 pm and 206 pm, respectivel…
1) What is the mass of a CO2 gas sample that occupies 5.60 L at STP? 2) Which of
1) What is the mass of a CO2 gas sample that occupies 5.60 L at STP? 2) Which of the following statements are correct? (Select all that apply). a Two moles of chlorine gas at 20 °…
1) What is the mass of one mole O2 molecule? 2a)What is the mass of two mole O2
1) What is the mass of one mole O2 molecule? 2a)What is the mass of two mole O2 ? 2b) What is the mass of 0.35 moles of O2 molecules? (3a) How many moles of O2 in 32.0 gram of O2 …
1) What is the maximum amount of P2O5 that can theoretically be made from 235g o
1) What is the maximum amount of P2O5 that can theoretically be made from 235g of P4 and excess oxygen? 2What is the maximum amount of P2O5 that can theoretically be made from 272…
1) What is the maximum amount of P2O5 that can theoretically be made from 235g o
1) What is the maximum amount of P2O5 that can theoretically be made from 235g of P4 and excess oxygen? 2What is the maximum amount of P2O5 that can theoretically be made from 272…
1) What is the molality of ethanol in a solution made by dissolving 14.6 g of et
1) What is the molality of ethanol in a solution made by dissolving 14.6 g of ethanol, C2HsOH, in 53.6 g of water? A) 0.00591 m B) 0.272 m C) 5.92 m D) 272 m E) none of these 2) D…
1) What is the nucleotide sequence of DNA that is complementary to: d-ATGCTGAAAT
1) What is the nucleotide sequence of DNA that is complementary to: d-ATGCTGAAATGCTA? Example for answer: ATCTCGTC (no dashes or space between nucleotides please). 2) What is the …
1) What is the objective of this experiment? ( name of the experiment Calcium Su
1) What is the objective of this experiment? ( name of the experiment Calcium Supplement) A) To learn how calcium is used in the body. B) To qualitatively how much calcium is an c…
1) What is the objective of this experiment? ( name of the experiment cooper cyc
1) What is the objective of this experiment? ( name of the experiment cooper cycle) A) Procedure a series of copper compounds beginning and ending with copper metal. B) Perform an…
1) What is the objective of this experiment? (Name of the experiment Introductio
1) What is the objective of this experiment? (Name of the experiment Introduction to Calorimetry) A) To redefine Hess' Law. B) To measure the light emitted from the reaction solut…
1) What is the objective of this experiment? (name of the experiment Beer\'s Law
1) What is the objective of this experiment? (name of the experiment Beer's Law) A) to create a calibration curve and solve for an unknown concentration of an element. B) to intro…
1) What is the objective of this experiment? A) To learn how gases interact with
1) What is the objective of this experiment? A) To learn how gases interact with one another B) To learn about 3D shapes of molecules C) To learn about lattice energies in solid s…
1) What is the objective of this experiment?( Name of experimnet Nomenclature) A
1) What is the objective of this experiment?( Name of experimnet Nomenclature) A) To learn how to name chemicals B) To mix a variety of chemicals and determine the degree of explo…
1) What is the overall charge state for the tetrapeptide DREAM at physiological
1) What is the overall charge state for the tetrapeptide DREAM at physiological pH. The pK values for N-terminal, C-terminal, side chain of asp, arg, glu are …
1) What is the oxidation state of copper before and after the reaction below? 2N
1) What is the oxidation state of copper before and after the reaction below? 2NO3-(aq) + 8H+(aq) + 3Cu(s) 3Cu2+(aq) + 2NO(g) + 4H2O(l) - Before the reaction? - After the reaction…
1) What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 90.
1) What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 90.0 mL of 0.0509 M NaOH and 60.0 mL of 0.0400 M Ba(OH)2? 2) What is the pH (to nearest 0.01 pH unit) …
1) What is the pH at the equivalence point in the titration of a 24.7 mL sample
1) What is the pH at the equivalence point in the titration of a 24.7 mL sample of a 0.332 M aqueous acetic acid solution with a 0.470 M aqueous potassium hydroxide solution? pH =…
1) What is the pH at the equivalence point in the titration of a 28.1 mL sample
1) What is the pH at the equivalence point in the titration of a 28.1 mL sample of a 0.424 M aqueous hypochlorous acid solution with a 0.469 M aqueous barium hydroxide solution? 2…
1) What is the pH of 0.075 M CH3COOH? (Ka = 1.8 x 10-5) 2) What is the pH of 0.1
1) What is the pH of 0.075 M CH3COOH? (Ka = 1.8 x 10-5) 2) What is the pH of 0.10 M NaCH3COO? 3) What is the pH of a solution containing 0.075 M CH3COOH and 0.10 M NaCH3COO? 4) Wh…
1) What is the pH of 0.164 M HNO3? A) Is the solution neutral, acidic, or basic?
1) What is the pH of 0.164 M HNO3? A) Is the solution neutral, acidic, or basic? B) What is the pOH? 2) For a solution of pH of 4.61 A) What is the [H3O+]? B) What is the [OH-] C)…
1) What is the pH of 1.32E-4 M KOH(aq) at 25 °C? ( K w = 1.01E-14) 2)what is the
1) What is the pH of 1.32E-4 M KOH(aq) at 25 °C? (Kw = 1.01E-14) 2)what is the relationship between polarizability and intermolecular forces? a)Polarizability effects the strength…
1) What is the pH of a 0.1 mM solution of hydrochloric acid at 37 degrees celsiu
1) What is the pH of a 0.1 mM solution of hydrochloric acid at 37 degrees celsius. show work a) 1 b) 2 c) can not be determined with information provided d) 4 e) 3 f) -0.3 2) Addi…
1) What is the pH of a 1.5x10^-8 M solution of HCl? 2) What is the pH when [HA-]
1) What is the pH of a 1.5x10^-8 M solution of HCl? 2) What is the pH when [HA-] = [A^2-] for a weak diprotic acid? 3) The formula for Malonic acid is HO2CCH2CO2H and it is a weak…
1) What is the pH of a 1.5x10^-8 M solution of HCl? 2) What is the pH when [HA-]
1) What is the pH of a 1.5x10^-8 M solution of HCl? 2) What is the pH when [HA-] = [A^2-] for a weak diprotic acid? 3) The formula for Malonic acid is HO2CCH2CO2H and it is a weak…
1) What is the pH of a hypochlorous acid/sodium hypochlorite buffer in which the
1) What is the pH of a hypochlorous acid/sodium hypochlorite buffer in which the concentration of the weak acid component is 0.115 M and the concentration of the conjugate base is…
1) What is the pH of a hypochlorous acid/sodium hypochlorite buffer in which the
1) What is the pH of a hypochlorous acid/sodium hypochlorite buffer in which the concentration of the weak acid component is 0.115 M and the concentration of the conjugate base is…
1) What is the pH of a solution prepared by diluting 75.00 mL of 0.020 M Ba(OH)
1) What is the pH of a solution prepared by diluting 75.00 mL of 0.020 M Ba(OH)2 with enough water to produce a total volume of 250.00 mL? 1.92 2) Calculate the pH of the followin…
1) What is the pH value of 50ml of 0.01M of H2CO3? Ka1= 4.3*10^-7, Ka2= 5.6*10^-
1) What is the pH value of 50ml of 0.01M of H2CO3? Ka1= 4.3*10^-7, Ka2= 5.6*10^-11 2) what is the pH if 10ml of 0.01M of NaOH is added into the solution in (1)? 3) what is the pH …
1) What is the pH value of 50ml of 0.01M of H2CO3? Ka1= 4.3*10^-7, Ka2= 5.6*10^-
1) What is the pH value of 50ml of 0.01M of H2CO3? Ka1= 4.3*10^-7, Ka2= 5.6*10^-11 2) what is the pH if 10ml of 0.01M of NaOH is added into the solution in (1)? 3) what is the pH …
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