Chemistry concepts and calculations

1, Whatis the -2B is rate H(A] with a rate constant of 0.0447 hr 8) A) 0.0645 hr

1, Whatis the -2B is rate H(A] with a rate constant of 0.0447 hr 8) A) 0.0645 hr B) 44.7 hr C) 0.0224 hr D) 15.5 hr E) 22.4 hr 9) The rate law for the rearrangement of CH NC to CH…

1, When 4.0 mole of LiI is dissolved 1000.0 ml of water, what resulting molality

1, When 4.0 mole of LiI is dissolved 1000.0 ml of water, what resulting molality (m) is used to calculate the change in boiling point of the water. 2, What mass ( in g) of NH3 mus…

1, Which choice is greener in a chemical process? a reaction that can be run at

1, Which choice is greener in a chemical process?             a reaction that can be run at 350 K for 12 hours without a catalyst             a reaction that can be run at 300 K f…

1, Why moisture content is significantly important during densification? 2, How

1, Why moisture content is significantly important during densification? 2, How we characterize the properties of biomass? 3, How biodiesel was produced from oil chemically? Pleas…

1, Would this incident be an example of social engineering? You receive a phone

1, Would this incident be an example of social engineering? You receive a phone call from the technical support department of a software maker alerting you to a bug in the company…

1, calculate the vapor pressure of solution A at 298K Ans: 19.0 torr 2, calculat

1, calculate the vapor pressure of solution A at 298K Ans: 19.0 torr 2, calculate the freezing point of solution B Ans: -19 Celcius 3, calculate the boiling point of solution C An…

1, show your work for the % difference calculation from \"Step 6\"in the procedu

1, show your work for the % difference calculation from "Step 6"in the procedure ca nced chemical equation for NaOH reacting with acetic acid 3. Show all calcula tions of the conc…

1, what happens when an nuclei with a spin number of ½ is subjected to an applie

1, what happens when an nuclei with a spin number of ½ is subjected to an applied magnetic field? 2. Recalling that we can have spin up and spin down orientations; what does this …

1, when 10.0 mL of 0.020 M IO_3, 30.0 mL of starch indicator, 10.0 ml of 0.0080

1, when 10.0 mL of 0.020 M IO_3, 30.0 mL of starch indicator, 10.0 ml of 0.0080 M HSO_3; and 50.0 are mixed, what is the molar concentration of HSO_3 in the resulting 100.0 mL of …

1, write the 5.4% glucose as a conversion factor. 2. Write the concentration 2.5

1, write the 5.4% glucose as a conversion factor. 2. Write the concentration 2.5M NacI as a conversion factor We dissolve 6.88 g of KOH in 200.0 g water. What is the mass percent …

1,.35 mol sample of O2 gas is at STT. What volume does the gas occupy A) 33.2 mo

1,.35 mol sample of O2 gas is at STT. What volume does the gas occupy A) 33.2 mol B) 166 mol C) 30.2 mol D) 0.0422 mol E) 1.93 mol ? 8) A mixture of gases contains 2.57 mol of oxy…

1,1 &course;, id: 182815-18contentid·837813. &steps; nul blackboard.com/webapps/

1,1 &course;, id: 182815-18contentid·837813. &steps; nul blackboard.com/webapps/assessment/take/launchjsp?course assessment id--56351 QUESTION 16 A varying force acts on a…

1,1,1,2-Tetrafluoroethane has a molar mass of 102 g/mol. The percent composition

1,1,1,2-Tetrafluoroethane has a molar mass of 102 g/mol. The percent composition is 23.5% C, 1.96% H, and 74.5% F. What is the empirical formula of 1,1,1,2-tetrafluoroethane? Expr…

1,2 Please, explain as much as you can!!! as if you were explaing to someone how

1,2 Please, explain as much as you can!!! as if you were explaing to someone how was little knowledge in chem! Thanks. Use written words. (PThe dipole moments of acetonitrile, CH,…

1,2,3,4 please explain answer 1. Systems tond to aflais a state of A mininen, mi

1,2,3,4 please explain answer 1. Systems tond to aflais a state of A mininen, minium C. minimurs, zero E maximem, maxinun 2. The part of the universe that is under coasideration i…

1,2,3,4,5,6,7,8, and 9 Which of the following statements is TRUE? There is a \"h

1,2,3,4,5,6,7,8, and 9 Which of the following statements is TRUE? There is a "heat tax" for every energy transaction. A spontaneous reaction is always a fast reaction. The entropy…

1,2,3,5,6 please! Are all ionic substances aqueous electrolytes? Are all aqueous

1,2,3,5,6 please! Are all ionic substances aqueous electrolytes? Are all aqueous electrolytes ionic compounds? What is the effect of the solvent on conductivity? Use your results …

1,2,3,6, Ex and mechanism? What would be observed if the phase-transfer catalyst

1,2,3,6, Ex and mechanism? What would be observed if the phase-transfer catalyst, tetrabutylammonium bromide, was omitted? Why? It was essential to stir reaction mixture vigorousl…

1,8,9 Directions: Additional information to complete these problems can be found

1,8,9 Directions: Additional information to complete these problems can be found in your Examination Booklet. -Given Values- Energy for Vacancy Formation (eV/atom): = 0.67 Metal: …

1,Feta cheese is prepared by immersing fresh cheese in brine solution containing

1,Feta cheese is prepared by immersing fresh cheese in brine solution containing 200g/L salt (sodium chloride) and holding it in the brine solution until the salt concentration re…

1,Predict whether each of the following bonds is ionic, polar covalent, or nonpo

1,Predict whether each of the following bonds is ionic, polar covalent, or nonpolar covalent. Drag the appropriate items to their respective bins. NP LiN BrF PBr BO KI Ionic bond …

1- (A) A 5.10 L sample of neon at 10.11 atm is added to a 13.0 L cylinder that c

1- (A) A 5.10 L sample of neon at 10.11 atm is added to a 13.0 L cylinder that contains argon. If the pressure in the cylinder is 7.92 atm after the neon is added, what was the or…

1- 0.20 g of hydrogen chloride (HCl) is dissolved inwater to make 8.0 L of solut

1- 0.20 g of hydrogen chloride (HCl) is dissolved inwater to make 8.0 L of solution. What is the pH of theresulting hydrochloric acid solution? 2- 0.80 g of sodium hydroxide (NaOH…

1- 2- 3- ... (1 mark) Part-l mgroup included in the periodic table? Give example

1- 2- 3- ... (1 mark) Part-l mgroup included in the periodic table? Give example of non metal group? Q1-Define the following terms: 2)Element 2)Elemen 1)Mass number (I mark) 02-ls…

1- A 1.0000 gram sample of zinc metal is added to a solution containing 1.2500 g

1- A 1.0000 gram sample of zinc metal is added to a solution containing 1.2500 grams of an unknown compound made of niobium, fluoride, and chloride. The reaction results in the fo…

1- A 1.0000 gram sample of zinc metal is added to a solution containing 1.2500 g

1- A 1.0000 gram sample of zinc metal is added to a solution containing 1.2500 grams of an unknown compound made of niobium, fluoride, and chloride. The reaction results in the fo…

1- A 25.0 g sample of garden compost was analyzed for chloride content. The samp

1- A 25.0 g sample of garden compost was analyzed for chloride content. The sample was dissolved in water and the chloride was precipitated as silver chloride. 1.58 g of dried pre…

1- A 30.00 mL wine sample is titrated with a 1.10×10 -1 M solution of sodium hyd

1- A 30.00 mL wine sample is titrated with a 1.10×10-1M solution of sodium hydroxide. The equivalence point is determined to be 34.705 mL. What is the acidity of the wine expresse…

1- A baseball weighs 220 g. Top speed for a professional pitcher is about 100 mp

1- A baseball weighs 220 g. Top speed for a professional pitcher is about 100 mph when he throws a fast ball. Find the de Broglie wavelength (in nm) associated with a baseball tha…

1- A gas mixture is made by combining 6.9 g each of Ar, Ne, and an unknown diato

1- A gas mixture is made by combining 6.9 g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 15.60 L. 2- 1.85 g of an unknown gas at 21 °C and…

1- A group of Chemistry Lab Students had the follwing data for three Trials of T

1- A group of Chemistry Lab Students had the follwing data for three Trials of Titration of 20.00ml of grocery grade vinegar (acetic acid) with 0.500M NaOH: Trial One: 34.4ml,   T…

1- A mixture of sodium chloride, ammonium chloride and sand was subjected to a s

1- A mixture of sodium chloride, ammonium chloride and sand was subjected to a separation. If a 2.336g mixture was separated to isolate 1.104g of sodium chloride, and 0.375g of sa…

1- A solution contains 0.317 M potassium nitrite and 0.326 M nitrous acid . The

1- A solution contains 0.317 M potassium nitrite and 0.326 M nitrous acid. The pH of this solution is:________________. 2- A solution contains 0.285 M sodium nitrite and 0.201 M n…

1- A student measures the molar solubility of silver carbonate in a water soluti

1- A student measures the molar solubility of silver carbonate in a water solution to be 1.30×10-4 M. Based on her data, the solubility product constant for this compound is : ___…

1- A student synthesized NiNH3)nC12 from NiC12. 6H20 using procedures described

1- A student synthesized NiNH3)nC12 from NiC12. 6H20 using procedures described in the lab manual. The student dissolved 0.90g of the product, Ni(NH3)nC12, in 40 mL of 1.0M HCl to…

1- A student weighs out a 11.8 g sample of copper(II) acetate, transfers it to a

1- A student weighs out a 11.8 g sample of copper(II) acetate, transfers it to a 300 mL volumetric flask, adds enough water to dissolve it and then adds water to the 300 mL tic ma…

1- Among phases of SDLC with one need more time to accomplish? a. Planning b. An

1- Among phases of SDLC with one need more time to accomplish? a. Planning b. Analysis c. Design d. Implementation e. No one f. All have the same delay 2- In which phases of SDLC …

1- Among the compounds H3CCH3, H2C=CH2, and HCCH, the compound with the stronges

1- Among the compounds H3CCH3, H2C=CH2, and HCCH, the compound with the strongest carbon-carbon bond is ________, and the compound with the longest carbon-carbon bond is ________.…

1- An aqueous solution of 10.10 g of catalase, an enzyme found in the liver, has

1- An aqueous solution of 10.10 g of catalase, an enzyme found in the liver, has a volume of 1.04 L at 27°C. The solution's osmotic pressure at 27°C is found to be 0.745 torr. Cal…

1- An electron in the 8 th energy level of the H atom drops to the 2 th energy l

1- An electron in the 8th energy level of the H atom drops to the 2th energy level. In other words an electron in an excited state drops to a less excited state. What is the energ…

1- Assembly Program Write a program in LC-3 assembly language. This program conv

1- Assembly Program Write a program in LC-3 assembly language. This program converts temperature to Fahrenheit. Use single digit (0-9) for the temperature. The following message w…

1- Balance each of the following equations and using the values of (Delta)G_f, c

1- Balance each of the following equations and using the values of (Delta)G_f, calculate (Delta)G_rxn (a) HgS(s) + O2(g) --> Hg(l) + SO2(g) (b) H2S(g) + O2(g) --> H2O(g) + S…

1- Calculate the concentration of each of the following solutions in mass percen

1- Calculate the concentration of each of the following solutions in mass percent. - 9.45g C2H6O in 68.1g H2O - 112g KCl in 608g H2O - 36.3mg KNO in 2.39 H2O 2- To what volume sho…

1- Calculate the theoretical yields of the compounds to be prepared in this expe

1- Calculate the theoretical yields of the compounds to be prepared in this experiment. The metal ion in both cases is the limiting reagent. Hint: Ftnd the number of moles of Cu(I…

1- Calculate the volume of one unit cell in fcc silver. Give answer in units of

1- Calculate the volume of one unit cell in fcc silver. Give answer in units of nm3 and in cm3.??? 2-How many unit cells are contained in a 30 cm3 block of fcc silver???? 3-Sketch…

1- Choose the best answer: A. The classification methods such as K-nearest-neigh

1- Choose the best answer: A. The classification methods such as K-nearest-neighbors, classification tree, neural network, support vector machine, etc. are the supervised learning…

1- Cobalt-57 has a half-life of about 272 days. If a sample has an initial mass

1- Cobalt-57 has a half-life of about 272 days. If a sample has an initial mass of 2.24 grams and undergoes decay until it has a mass of 0.140 grams, how many half-lives have pass…

1- Consider 4.90 L of a gas at 365 mmHg and 20. degrees celisus . If the contain

1- Consider 4.90 L of a gas at 365 mmHg and 20. degrees celisus . If the container is compressed to 3.00 L and the temperature is increased to 40.degrees celisus , what is the new…

1- Consider 4.90 L of a gas at 365 mmHg and 20. degrees celisus . If the contain

1- Consider 4.90 L of a gas at 365 mmHg and 20. degrees celisus . If the container is compressed to 3.00 L and the temperature is increased to 40.degrees celisus , what is the new…

1- Consider the following ionization energies for aluminum: Al(g) ? Al+(g) + e I

1- Consider the following ionization energies for aluminum: Al(g) ? Al+(g) + e IE1 = 580 kJ/mol Al+(g) ? Al2+(g) + e IE2 = 1815 kJ/mol Al2+(g) ? Al3+(g) + e IE3 = 2740 kJ/mol Al3+…