Chemistry concepts and calculations

1) For the reaction shown, calculate how many grams of oxygen form when each qua

1) For the reaction shown, calculate how many grams of oxygen form when each quantity of reactant completely reacts. 2HgO(s)?2Hg(l)+O2(g). Please show answers in grams. 1) 2.51 gH…

1) Formaldehyde is a __________ at room temperature. A) Liquid. B) can\'t tell.

1) Formaldehyde is a __________ at room temperature. A) Liquid. B) can't tell. C) solid. D) gas. **(I put liquid but the answer was wrong!!!)** 2) Overdose of __________ during pr…

1) Frame relay networks are commonly used today for terminal-to-computer and com

1) Frame relay networks are commonly used today for terminal-to-computer and computer-to-computer communications. a) True b) False 2) Real computers today frequently use network p…

1) From YOUR data, calculate the volume occupied by 100 g of the following: a) s

1) From YOUR data, calculate the volume occupied by 100 g of the following: a) salt solution b) metal bar 2) From your answers to question 1, determine whether the metal bar or th…

1) From YOUR data, calculate the volume occupied by 100 g of the following: a) s

1) From YOUR data, calculate the volume occupied by 100 g of the following: a) salt solution b) metal bar 2) From your answers to question 1, determine whether the metal bar or th…

1) From the data is the ratio of metal to hydrogen gas 2:1, 1:1, or 2:3? Briefly

1) From the data is the ratio of metal to hydrogen gas 2:1, 1:1, or 2:3? Briefly explain. 2) The equation for the trendline follows the formula y = mx + b, where b is the y-interc…

1) From the texts below do what you ask. A) Atmospheric nitrogen dioxide acts as

1) From the texts below do what you ask. A) Atmospheric nitrogen dioxide acts as the catalyst for the oxidation reaction of sulfur dioxide in sulfur trioxide by atmospheric oxygen…

1) Galvanized nails are iron nails that have been plated with zinc to prevent ru

1) Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is Zn2+(aq)+2e??Zn(s) For a large batch of nails, a manufacturer needs…

1) Gas-phase carbonyl sulfide (OCS) absorbs radiation strongly near 2100 cm maki

1) Gas-phase carbonyl sulfide (OCS) absorbs radiation strongly near 2100 cm making it a convenient reference when spectroscopists need to calt th brate eir instruments. A large nu…

1) Give example of protein found in animal and vegetarian sources such as meat,

1) Give example of protein found in animal and vegetarian sources such as meat, milk, beans. 2) List three denaturing agents that can act on proteins and explain how each one disr…

1) Give the chemical names for the following a-e in picture. 2) Give the correct

1) Give the chemical names for the following a-e in picture. 2) Give the correct 3-D structures for the given chemical name 3) Draw all the geometric and optical isomers for K_4[C…

1) Give the correct IUPACname for the above. 2) what is the molecularformula ? 3

      1) Give the correct IUPACname for the above.       2) what is the molecularformula ?       3) which statement is trueabout the carbon marked with an *                       …

1) Give the electron configuration for the valence shell for the following atoms

1) Give the electron configuration for the valence shell for the following atoms. Use parenthesis to separate the number of electrons in the subshell(s). For example, for N enter …

1) Give the expected hybridization of the central atom in the following molecule

1) Give the expected hybridization of the central atom in the following molecules sulphur in SF6 oxygen in H2O seleniurn SeO3 phosphorus in PBr5 tellurium in TeF4 2) if we trcat H…

1) Give the formula of the conjugate base of HSO4. Give the formula for the conj

1) Give the formula of the conjugate base of HSO4. Give the formula for the conjugate acid of HSO4. 2) Complete these Brønsted-Lowry reactions. HS- + H+ HS- + OH- 3)Write the equi…

1) Give the molecular ion that would be observed in the mass spectrum of this co

1) Give the molecular ion that would be observed in the mass spectrum of this compound and 2-3 key IR peaks that would help identify the molecule. 2) Show using curved arrows how …

1) Give the name or else the chemical formula, as appropriate, for the following

1) Give the name or else the chemical formula, as appropriate, for the following binary molecular compounds or hydrates: a) XeBr3, b) N2O5. c) P4S1o. d) diboron tetrachloride. e) …

1) Give the number of total electron groups, the number of bonding groups, and t

1) Give the number of total electron groups, the number of bonding groups, and the number of lone pairs for (a) geometry. Express your answers as integers separated by commas. 2) …

1) Give the pH for the following solution below... Give the pH for the following

1) Give the pH for the following solution below... Give the pH for the following solutions below A buffer is prepared by making a 750.00 mL of a solution that is both 0.300 M solu…

1) Give the term for the temperature at which the gas and liquid phases form a s

1) Give the term for the temperature at which the gas and liquid phases form a supercritical fluid. 2) Which has the smallest dipole-dipole forces? A) CH3Cl   B) HBr C) O2 D) NO  …

1) Give the total number of electrons avaliable for bonding in the molecule CH3C

1) Give the total number of electrons avaliable for bonding in the molecule CH3COOCH3 ____ 2)The functional group, COOH would be associated with an ___________? a) ester b) ketone…

1) Given that mass of anthracene = 2.88 g molar mass of anthracene = 178.2 g/mol

1) Given that mass of anthracene = 2.88 g molar mass of anthracene = 178.2 g/mol mass of solvent ( biphenyl) = 25.74 g = 0.02574 kg Then, molality = ( mass of solute / molar mass …

1) Given that, Ka = 2.2*10^-6 and C = 0.25 M From Ka and C, concentration of H+

1) Given that, Ka = 2.2*10^-6 and C = 0.25 M From Ka and C, concentration of H+ ions in the solution can be calculated as [H+] = sqrt(Ka*C) = sqrt(2.2*10^-6*0.25) = 0.000714 M Now…

1) Given the following Python code, what will the data type of pet be? pet = \"G

1) Given the following Python code, what will the data type of pet be? pet = "Gordon", "Gecko", 3 T/F 2) The following statement can cause an exception: names_file = open('names.t…

1) Given the following chemical equation, how many grams of N2 are produced by 8

1) Given the following chemical equation, how many grams of N2 are produced by 8.39 g of H2O2 and 6.21 g of N2H4. 2H202(l) + N2H4 (l) --> 4H2O(g) + N2 (g) 2) Nitrogen and hydro…

1) Given the reaction below, calculate S univ at 298 K AND determine whether the

1) Given the reaction below, calculate Suniv at 298 K AND determine whether the reaction is spontaneous. 4 Fe (s) + 3 O2 (g) 2 Fe2O3 (s) 2) Given the reaction below, calculate Grx…

1) Given the reaction of hydrogen and chlorine gases, calculate the moles of hyd

1) Given the reaction of hydrogen and chlorine gases, calculate the moles of hydrogen that react to produce 4.00 mol of HCl. H2(g)+Cl2(g)2HCl(g) 2) Given the balanced equation, ca…

1) Glucose cannot be synthesized from the -oxidation of even chain fatty acids b

1) Glucose cannot be synthesized from the -oxidation of even chain fatty acids because: a) gluconeogenesis is inhibitid by acetyl CoA produced in the -oxidation of fatty acids b) …

1) Gold (Au) crystallizes in a cubic close-packed (face-centered cubic unit cell

1) Gold (Au) crystallizes in a cubic close-packed (face-centered cubic unit cell). The unit cell edge length is 144pm. What is the density of the gold crystal? 2) In an experiment…

1) Gold is frequently purified by electroplating. Typically the gold is dissolve

1) Gold is frequently purified by electroplating. Typically the gold is dissolved in a cyanide solution (which is fairly selective for gold) and then it is pulled out of solution …

1) HEPES (in the HA form, MW= 238) a common buffer in biochemistry has a pKa= 7.

1) HEPES (in the HA form, MW= 238) a common buffer in biochemistry has a pKa= 7.56. How many mls of a 0.02 M NaOH solution should be added to 5.0 g of HEPES to make 200 mL of a pH…

1) Here is the 1 H NMR of your final product. Please use this spectrum when answ

1) Here is the 1H NMR of your final product. Please use this spectrum when answering the next three questions. Which proton(s) is/are responsible for the triplet at ~1.1 ppm? Hydr…

1) How could thin layer chromatography have been used to asses the purity of the

1) How could thin layer chromatography have been used to asses the purity of the separated components of nitrophenol and Triphenylmethanol in a liquid-liquid extraction. 2) Which …

1) How do efficient separations occur in columns filled with silica gel? 2) Sili

1) How do efficient separations occur in columns filled with silica gel? 2) Silica gel is a non-poisonous solid that is sold in batches of different particle sizes. For column chr…

1) How do modern automobile air bags work? Write equation to support. 2) 18.34 M

1) How do modern automobile air bags work? Write equation to support. 2) 18.34 Match the following items b formulas in the space provided. y placing the appropriate letter(s) to t…

1) How does the alcohol get from the outer chamber to the inner?How can this pro

1) How does the alcohol get from the outer chamber to the inner?How can this process be hastened? (2 ways)? 2) What is the purpose fo the different chemical additions to theouter …

1) How does the initial reactant concentration affect: the initial reaction rate

1) How does the initial reactant concentration affect: the initial reaction rate? the overall reaction order? the rate constant? 2) How does the temperature affect: the initial re…

1) How many H+ ions can the acid CH3CO2H donate per molecule? Select one: A. 1 B

1) How many H+ ions can the acid CH3CO2H donate per molecule? Select one: A. 1 B. 4 C. 3 D. 2 2) The reaction HNO3(aq) + KOH(aq) KNO3(aq) + H2O(l) is best classified as a(n) Selec…

1) How many atoms are there in 51.3 g of barium chloride (BaCl2)? 2) How many mo

1) How many atoms are there in 51.3 g of barium chloride (BaCl2)? 2) How many moles of carbon monoxide (CO) are in 29.3 g of the compound? 3) What is the formula for copper(II) ph…

1) How many dots are present in the correct Lewis dot symbol for the element Gol

1) How many dots are present in the correct Lewis dot symbol for the element Gold (Au)? 2) How many dots are present in the correct Lewis dot symbol for the element Mercury (Hg)? …

1) How many electrons are in the given molecule’s largest conjugated p system? 2

1) How many electrons are in the given molecule’s largest conjugated p system? 2) How many electrons are in the following molecule’s largest conjugated p system? Eight ten 3) Assu…

1) How many grams of NaCl are required to make 500.0 mL of a 1.500 M solution? -

1) How many grams of NaCl are required to make 500.0 mL of a 1.500 M solution? -is it 43.83 g? 2) Consider the following balanced reaction. How many moles of O2 are formed when 58…

1) How many grams of argon gas are present in a 7.5 liter sample that mm Hg at 3

1) How many grams of argon gas are present in a 7.5 liter sample that mm Hg at 35°C? exerts a pressure of 575 2) A 1.58 gram sample of C,H,X the element X has a volume of 297 mL a…

1) How many grams of dry NH4Cl need to be added to 2.30 L of a 0.100 M solution

1) How many grams of dry NH4Cl need to be added to 2.30 L of a 0.100 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.64? Kb for ammonia is 1.8×105. Exp…

1) How many grams of dry NH4Cl need to be added to 2.40 L of a 0.800 M solution

1) How many grams of dry NH4Cl need to be added to 2.40 L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.82? Kb for ammonia is 1.8 x 10^-5.…

1) How many hydrogen bonds are formed between GC pair and AT pair? a) GC base pa

1) How many hydrogen bonds are formed between GC pair and AT pair? a) GC base pairing has 3 hydrogen bonds and AT pair has 3 hydrogen bonds also. b) GC base pairing has 3 hydrogen…

1) How many items in a \"mole\" of items? 2) How many itmes in 18.005 moles of i

1) How many items in a "mole" of items? 2) How many itmes in 18.005 moles of items? 3) How many itmes in 00.002568 mole of items? Place combining numbers (aka "oxidation numbers")…

1) How many kinds of chemically and magnetically nonequivalent hydrogen nuclei a

1) How many kinds of chemically and magnetically nonequivalent hydrogen nuclei are there in ethylbenzene? a) 3 b) 4 c) 7 d) 5 e) 6 2) What is the splitting pattern expected for th…

1) How many milliliters of 0.55 M HCl are needed to react with 6.2 g of CaCO 3 ?

1) How many milliliters of 0.55 M HCl are needed to react with 6.2 g of CaCO3? - mL 2) How many grams of NaH2PO4 are needed to react with 37.11 mL of 0.285 M NaOH? - g 3) How many…

1) How many molecules of ethane (C6H6) are present in 0.592g of C2H6? (scientifi

1) How many molecules of ethane (C6H6) are present in 0.592g of C2H6? (scientific notation). 2) How many atoms are in 15.49g of copper (Cu)? (scientific notation) 3) Write an unba…