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Chemistry Questions
What is the standard cell potential for an electrochemical cell based on the following half-reactions? IO3-(aq)...
The Ka of a monoprotic weak acid is 4.51*10^-3. What is the percent ionization of a...
A student used 1.506 g of p-cresol and 1.992 g of t-butanol in the synthesis of...
A 1.00 L buffer solution is 0.250 M in HF and 0.250 M in LiF. Calculate...
A mixture of 0.00100mol of gas A and 0.00200mol of gas B was allowed to reach...
A 47.5 block of an unknown metal is heated in a hot water bath to 100...
1. A metal sample, at 20. degree Celsius, has a heat capacity of 0.25 J/C. How...
Write balanced molecular, total ionic, and net ionic equations for the reaction between nitric acid and...
List the equilibria from largest to smallest equilibrium constant. List the equilibria from largest to smallest...
A 4.0021g sample of impure KHP (KHP+NCL was dissolved in enough water to make 100.00ml of...
Both n-octane and isooctane have essentially the same heat of combustion. How is that possible if...
A)what is the pH of a solution made by mixing 465 ml of .10 M hydrochloric...
A sample of 4.00 g of methane is mixed with 15.0 g of chlorine with the...
Determine the limiting reactant (LR) and the mass (in g) of product that can be formed...
Rank the following elements according to their metallic character. Ge C Si Pb
Cr2O3 + 2Al = 2Cr +Al2O3 If 150g of Cr2O3 and 150 g of Al are...
The decomposition of sulfuryl chloride (SO2Cl2) is a first-order process. The rate constant for the decomposition...
For a particular reaction at 221.9 °C, ΔG = -92.39 kJ/mol, and ΔS = 130.33 J/(mol·K)....
Nitrosyl bromide (NOBr) can be obtained as a pure liquid at low temperatures. The liquid boils...
A 12.8 mL sample of HNO3 was diluted to a volume of 100.52 mL. Then, 26...
To prevent the presence of air, noble gases are placed over highly reactive chemicals to act...
For each of the following solutions, calculate the initial pH and the final pH after adding...
The solubility of CO2 in a salt water lake at 298 K and 750 torr pressure...
1. Which is hotter? A piece of iron thats red hot or a tungsten thats red...
Calculate the root mean square velocity and kinetic energy of CO, CO2, and SO3 at 264...
THERMODYNAMICS You have a phosphate buffer at pH 7.8. What ionic constituents are present in the...
When many atoms combine to form ionic compounds the reaction is highly exothermic. Where is most...
A sol'n was prepared by measuring out 6.2g of NaC7H5O2 with 2.25g of HC7H5O2, and it...
Two substances, A and B, initially at different temperatures, come into contact and reach thermal equilibrium....
A solution of NaIO was standardized with KMnO4. If 20.0 ml of NaIO required 18.7 ml...
A) Calculate the pH of a solution that is 0.270 M in sodium formate (HCOONa) and...
If the concentration of NaOH used in today's lab was not standardized properly, and is actually...
A gas mixture is made by combining 8.8 g each of Ar, Ne, and an unknown...
Which of the following are permissable sets of quantum numbers for an electron in a hydrogen...
Begin by writing formulas for the reactants and products, including physical states. When necessary use coefficients...
Selenous acid (H2SeO3) is a diprotic acid Ka1 = 4.5 x 10-3 and Ka2 = 5...
Calculate the pH after 1.0 mL of 0.100 M HCl has been added to 40.0 mL...
In a mixing unit at your plant, you mix 40 moles/min of an equimolar mixture of...
The dibasic compound B (pKb1 = 4.00, pKb2 = 8.00) was titrated with 1.00 M HCl....
1. The complex ion, [Ti(H20)6]^2+, has a maximum absorption near 498 nm. Calculate the crystal field...
Gasoline is primarily a mixture of hydrocarbons and is sold with an octane rating that is...
For the following reaction dHorxn= 63.11 kJ/mol and dSorxn= 148 J/mol K. BaCl2H2O(s) <---> BaCl2(s) +...
Determine the pH of each of the following two-component solutions. 0.260 M NH4NO3 and 0.102 M...
Draw the structure of the bromohydrin formed when (Z)-2-hexene reacts with Br2/H2O. -Use the wedge/hash bond...
The pKa of the amine group of the amino acid serine is 9.15. A- What is...
The indicator methyl red has a pKHIn=4.95. It changes from red to yellow over the pH...
Determine [Zn2 ], [CN–], and [HCN] in a saturated solution of Zn(CN)2 with a fixed pH...
Suppose that the microwave radiation has a wavelength of 12.4 cm . How many photons are...
Identify each of the following balance chemical reactions as either precipitation, oxidation-reduction (redox), and/or acid-based neutralization...
What happens to the diethylamine that is not extracted from the organic layer when HCl is...
Ionic Compound Mass (g) T i (°C ) Tf (°C) ∆T (°C) q (J) ∆H (J/mol)...
Scrutinize the 13C NMR spectrum of the methyl 3-nitrobenzoate If you had not kept watch over...
sodium cyanide is the salt of the weak acid HCN. Calculate the concentration of H30+, oh-,HCN,...
*4 PARTS* Write the balanced chemical, ionic, and net ionic equations for the following reactions, and...
Oxygen or Carbon Dioxide is the main funtion for gas exchange in what? Capillaries or Alveoli?
Sodium fluoride is added to many municipal water supplies to reduce tooth decay. Calculate the pH...
A 0.40 gram sample of NaOH (molar mass = 40.0 g/mol) was completely neutralized with 62.5...
A 25 mL aliquot of an HCl solution is titrated with 0.100 M NaOH. The equivalence...
13. A)Solid zinc acetate is slowly added to 75.0 mL of a 0.0683 M ammonium phosphate...
For the following reaction, Kc = 255 at 1000 K. CO (g) + Cl2 (g) ⇌...
If the pH of the solution is 4.66, what is the [H3O+]
Equal quantities by weight of water at +50.0˚C and of ice at -40.0˚C are mixed together....
Air has a thermal conductivity of 3 x 10-4 J cm-1 s-1 K-1. Consider a window...
14. A)Solid zinc nitrate is slowly added to 75.0 mL of a 0.483 M ammonium phosphate...
Calculate the amount of energy in kilojoules needed to change 225 g of water ice at...
1.) predict the products of the reaction between the following: 1-chloro-1-methyl cyclohexane and KOH in ethanol...
Find ΔG∘rxn for the reaction: N2O(g)+NO2(g)→3NO(g) Use the following reactions with known ΔG values: 2NO(g)+O2(g)→2NO2(g)ΔG∘rxn=−71.2kJ N2(g)+O2(g)→2NO(g)ΔG∘rxn=+175.2kJ...
Parts A.6 and B.2. For the standardization of the NaOH solution in Part A.6, the endpoint...
Calculate the pH of 0.10 NH4Cl (aq)?
A vessel with a volume of 41.8 L contains 2.80 g of nitrogen gas, 0.403 g...
Assign an oxidation number to the metal in the following compounds. Part A AlF3 Express your...
What is the boiling point in oC of a 0.30 M solution of NaHSO4 if the...
which appears to have the greatest effect on the hydrolysis of t-butyl chloride: concentration of the...
Do weak acids react with strong bases better than a strong acid reacting with a strong...
Using values of the mean bond enthalpies estimate the standard enthalpy of formation of (a) gaseous...
a concentrated phosphoric acid solution is 85% H3PO4 by mass and has a density of 1.69g/mL...
Write a balanced reaction for which the following rate relationships Rate = 1/2(∆[N2]/∆t) = (∆[O2]/∆t)...
1. Find the MSDS for potassium chlorate. a) Are there any health hazards associated with this...
A 1.550-g sample of a solid, weak, monoprotic acid is used to make 100.0 mL of...
What mass of Cr(s) (in g) may be electrodeposited from application of a 0.436 A current...
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