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Chemistry Questions
The equilibrium constant, K, for the following reaction is 1.80×10-2 at 698 K. 2HI(g) H2(g) +...
What is the pH of a 0.25 M solution of acetic acid? The Ka for acetic...
The freezing point of 53.48 g of a pure solvent is measured to be 41.91 ºC....
What is the osmolarity of each of the following solutions? 1) 3%(m/v)NaCl (strong electrolyte), used to...
A 1.50 gram sample of 2-naphthol and naphthalene was diluted with 2.00 mL of methanol and...
How many milliliters of 1.92 M NaOH must be added to 1.00 × 102 mL of...
From the list below, pick an acid, along with its conjugate base, that can be used...
A sample of gas contains 0.1300 mol of HBr(g) and 6.500×10-2 mol of Cl2(g) and occupies...
If you were travelling outward from the earth in a space shuttle at an altitude of...
consider the titration of a weak monoprotic acid (HA) with a strong base. If the titration...
VSEPR 3D Model of the following: (Show polarity) CH4 CH3Cl CH2Cl2 NH3 H2O H3O+
A sample of pure NO2 is heated to 336 ∘C at which temperature it partially dissociates...
A 0.67 mg sample of nitrogen reacts with hydrogen to form 0.8146 mg of hydride. What...
What feature in its structural formula indicates whether a hydrocarbon is an alkane, alkene, alkyne or...
A solution contains 0.323 M potassium fluoride and 0.416 M hydrofluoric acid. The pH of this...
which of the following does not contain ribosomes? (a) fungi (b) archeae (c) protista (d) all...
Aspirin can be sunthesized in the lab by combining salicylic acid (C7H6O3) and acetic anhydride (C4H6O3)...
Fe(OH)3 <--> Fe3 + 3OH a) Write the appropriate equilibrium expression for the reaction. b) If...
Mike needs to make 2 liters of a 0.3 M NaOHsolution for an experiment. He has...
From a thermodynamic point of view, how does a protein fold into its native and functional...
Can a standard glycine and protein solutions look identical after a ninhydrin test is complete? Can...
A solution containing 10.00 mL of 0.0500 M metal ion buffered to pH = 10.00 was...
consider the titration of 50mL of 1.5 M HCOOH with .50 M NaOH. Ka= 1.8x10^-4 &...
"provide products and mechanisms for (z)-3,4-dimethyl-2-pentene reaction with Br2 in H2o including stereochemisty"
what are the moles of, 1.87 g SiO2, 0.95 g NH4Cl, and 2.46g NaCl?
An experimental procedure asks you to measure 10 mL of a solution to the nearest 0.01...
In synthesis of potassium 4-nitrophenoxide chemical equation is p-NO2C6H4OH+KOH->(pNO2C6H4O-K+) + H2O Why product is settled although...
A molecule of an unknown substance has a mass of 1.75⋅10−211.75⋅10-21 grams. What is this substance's...
Hello, I'm in Ap chem and have a lab due tonight. in the lab we had...
You need to make a 50X stock solution for later use. The 1X solution requires 0.9...
What is the limiting reagent and theoretical yield? (please show work step by step with units)...
If the following data was observed for the reaction OCl- + I- à OI- + Cl-...
Convert 15 ppb of Lead (Pb) to mg/kg. Show work.
show two different pathways for the synthesis of 2-methylhexane using grignard reagent. name all the reagents...
a) What feature of an atom defines it as a particular element? b) How do isotopes...
PLEASE SHOW ALL WORK A protein segment of sequence Phe Cys Gly Val Leu His Lys...
Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide...
Match the following aqueous solutions with the appropriate letter from the column on the right. 1....
1a. At 573 K, gaseous NO2 decomposes, forming NO(g) and O2. If a vessel containing NO2(g)...
A 9.00L tank at 25.1°C is filled with 10.2g of dinitrogen difluoride gas and 11.6g of...
8. Which of the following reactions cannot proceed through a single elementary step in view of...
To determine the concentration of a solution of sulfuric acid, a 125.0-mL sample is placed in...
provide the explanation for why your calculation is different from the true acid concentration
One way of preparing H2 (g) is given by the reaction of Zn (s) with HCl...
For the reaction S2O82- + 3I1- ---> 2SO42- + I31- The rate law is rate =...
Provide the starting materials for: 1. Nylon 46 [poly(tetramethylene adipamide)] (and what is the structure of...
Calculate how you will prepare 0.1M buffer solutions ranging from pH 1-12 in increments of 1...
How many moles of sebacoyl chloride do you have if you measure out 5 mL of...
which of sensor has the smaller sensing area gas pressure or thermometers or bimetallic thermometers?
3) Answer all parts of the following question. a. The reaction: Al(s) + Fe2O3(s) → Fe(s)...
If 5.0 Liters of a gas is allowed to expand against a pressure of 1.10 atm...
4. A buffer was made with ammonia concentration 0.2 M and ammonium sulfate 0.05M. Calculate the...
what is the lewis dot structure for NCCOH the condensed version to determine hybridization
Draw the product of the citric acid cycle reaction for which malate is a reactant. Be...
Determine the mass, in grams, of sucrose (C12H22O11,M = 342.3 g/mol) needed to prepare a solution...
A 25.0 mL sample of a 0.2400 M solution of aqueous trimethylamine is titrated with a...
a.) Find the pH of a 0.130 M solution of a weak monoprotic acid having Ka=...
Would you expect your parent hydrocarbon molecule, naphthalene, to have a dipole moment? (Y/N) Explain.
1/ write a balanced equation for: a/ cyclopentanone with H2SO4 b/ Cyclopentanone with 2,4 dinitrophenylhydrazine c/...
Two peptone iron deeps were inoculated with bacteria X and bacteria Y respectively. After 24 hours,...
Which technology demonstrates the principles of quantum mechanics? a. laser d. MRI b. spectrophotometer e. all...
what are the advantages of photo diode array detector ??
1. How many grams of Ca must react with 41.5 g of Cl to form CaCl...
pick a combination of one of the following molecules, one mass quantity, and one total solution...
A student ran the following reaction in the laboratory at 380 K: CH4(g) + CCl4(g) 2CH2Cl2(g)...
When 18.0 mL of a 6.87×10-4 M silver fluoride solution is combined with 12.0 mL of...
Iron(III) oxide reacts with carbon to give iron and carbon monoxide: Fe2O3(s)+3C(s)→2Fe(s)+3CO(g) Question: How many grams...
what makes chalcone and pyrazoline derivatives have different biological activity? (such as anticancer, anti-inflammatory, antioxidant etc)....
How can you get Aspirin as a product from 2-Butene?
Hydrogen peroxide is 94.07% oxygen and 5.93% hydrogen by mass. A). Calculate the Empirical Formula. B)....
For each of the following samples of ionic substances, calculate the number of moles and mass...
A sample of 1.3 mol of CO2 (g) is placed in a 5.0 L rigid container...
The first-order rearrangement propane is measured to have a rate constant of 2.85 × 10-11 s-1...
Using the elemental, inductive, resonance and hybridizations effects, explain a scenario that would make for a...
what does copper ii sulfate do to the enzyme activity using potato liquid. how do you...
8.A compound has the common name N-methylbenzamide. Which of the following is not true? Question 8...
The equilibrium constant, K, for the following reaction is 1.29×10-2 at 600 K. COCl2(g) CO(g) +...
Use information from Appendix D to calculate the pH of (a) a solution that is 0.250...
9.8 m/s2 → ft/hr2 (meters per second squared, NOT meters squared per second squared) 416692913 ft/hr2...
Q1) solve part A,B,C and D A)Magnesium carbonate thermally decomposes to magnesium oxide and carbon dioxide...
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