Michael S.

11/02/22

During the processing of black-and-white photographic film, excess silver(I) halides are removed by washing the film in a bath containing sodium thiosulfate.

During the processing of black-and-white photographic film, excess silver(I) halides are removed by washing the film in a bath containing sodium thiosulfate. This treatment is based on the... more

Follows • 1

Answers •1

Chemistry

10/31/22

What two points should be plotted to graphically determine the activation energy of this reaction? To avoid rounding errors, use at least three significant figures in all values.

Consider the reaction data.A⟶productsA⟶products 𝑇 (𝐊)T (K)𝑘 (𝐬−1)k (s−1) 325 0.400 525 0.841 Determine the rise, run, and slope of the line formed by these points.

Follows • 1

Answers •1

Chemistry

10/31/22

How would you find it?

When a metal was exposed to photons at a frequency of 1.38×1015 s−1, electrons were emitted with a maximum kinetic energy of 3.80×10−19 J.Calculate the work function, Φ, of this metal.Φ =What is... more

Follows • 1

Answers •1

Chemistry

10/29/22

Consider the four scenarios involving visible light.

visible light has a frequency of 5.725×1014 s−1.5.725×1014 s−1. Determine its wavelength, energy per photon, and color.wavelength ? nmIn scenario C, visible light is in the middle of the yellow... more

Follows • 1

Answers •1

Chemistry

10/29/22

A hypothetical molecule, X–Y, has a dipole moment of 1.27 D and a bond length of 139 pm. Calculate the percent ionic character of this molecule.

Follows • 1

Answers •1

Chemistry

10/28/22

K to relative abundance reactants, products

The equilibrium constant, Kc, for the following reaction is 7.00×10-5 at 673 K. NH4I(s) NH3(g) + HI(g) This reaction is fill in the blank 1 favored at... more

Follows • 1

Answers •1

Chemistry

10/20/22

reversible reaction

For the reversible reactionN2(g) + O2(g) ----> 2NO(g)the concentrations at equilibrium are [N2] = 0.23 M and [O2] = 0.44 M, and K = 2.1 × 10–3. Find [NO] at equilibrium.

Follows • 1

Answers •1

Chemistry

10/20/22

What is the pH at the start of the titration, before any barium hydroxide has been added?

A 17.4 mL sample of a 0.416 M aqueous nitrous acid solution is titrated with a 0.359 M aqueous barium hydroxide solution. What is the pH at the start of the titration, before any barium... more

Follows • 1

Answers •1

Chemistry

10/20/22

Solve for Concentration

For the reaction: H2(g) + Br2(g) ⇌ 2 HBr(g), Kc = 7.5 × 10^2 at a certain temperature. If 2 mole each of H2 and Br2 are placed in 2-L flask, what is the concentration of H2 at equilibrium?

Follows • 1

Answers •1

Chemistry

10/20/22

What is the value for Kc

If Kc = 7.04 × 10‒2 for the reaction: 2 HBr(g) ⇌ H2(g) + Br2(g), what is the value of Kc for the reaction: ½ H2(g) + ½ Br2(g) ⇌ HBr(g)?

Follows • 1

Answers •1

Chemistry

10/20/22

A student records the masses of several paper clips. Use the data in the table below to the standard deviation of the mean mass of a paper clip (in grams).

Sample. Mass (g)Paper Clip 1 = 1.087Paper Clip 2 = 1.113Paper Clip 3 = 0.999Paper Clip 4 = 1.007Paper Clip 5 = 1.109

Follows • 1

Answers •1

Chemistry

10/20/22

How much will be left? Round your answer to the nearest 0.1 mol

Hydrogen H2 gas and oxygen O2 gas react to form water H2O vapor. Suppose you have 5.0 mol of H2 and 9.0 mol of O2 in a reactor.Suppose as much as possible of the H2 reacts. How much will be left?... more

Follows • 1

Answers •1

Chemistry

10/19/22

Which of the following statements are true and which are false? A sigma molecular orbital may

1) have delocalized electrons in conjugated compounds.2) not result from two atomic p orbitals.3) not have a single lobe of electron density.4) be bonding or antibonding.5) result from an atomic p... more

Follows • 1

Answers •1

Chemistry

10/19/22

Calculate ΔH for the neutralization of HCl(aq) by NaOH(s) using Hess's Law

A. ΔHsolution of NaOH(s) Phase Change:Mass of NaOH: 2.020 gΔT for reaction A : 8.5 °CB. ΔHsolution for neutralization of HCl(aq) and NaOH(aq):Volume of HCl: 0.0500 LVolume of NaOH: 0.0500 LVolume... more

Follows • 2

Answers •1

Chemistry

10/19/22

For the following reaction, 10.3 grams of nitrogen gas are allowed to react with 1.17 grams of hydrogen gas.

nitrogen + hydrogen -> ammonia What is the maximum mass of ammonia that can be formed?Mass = gWhat is the FORMULA for the limiting reactant?What mass of the excess reagent remains after the... more

Follows • 1

Answers •1

Science Chemistry

10/18/22

What is the equilibrium constant (K) for this dissolution of potassium bitartrate?

If 8.2 mL of 0.055 M NaOH is required to titrate a 5.5 mL sample of potassium bitartrate, what is the equilibrium constant (K) for this dissolution of potassium bitartrate?

Follows • 2

Answers •1

Chemistry

10/09/22

Write balanced equations for the equilibria for HPO42- reacting with HNO and with NO1-

Write balanced equations for the equilibria for HPO42- reacting with HNO and with NO1-.

Follows • 2

Answers •1

Chemistry

10/07/22

An electron in a hydrogen atom relaxes to the n = 4 level, emitting light of 114 THz. What is the value of n for the level in which the electron originated?

Follows • 1

Answers •1

Chemistry

10/06/22

Chemistry 120 Lab Question

Would your experimental n be higher or lower than the true value if you made the following errors in this laboratory? a. You are in a hurry to leave the laboratory and you do not achieve a constant... more

Follows • 1

Answers •1

Chemistry

10/06/22

(True / False) question about experiments and variables / data

Which of the following statements is true?1) The experiment setup should have as many constants as possible.2) The scientists should decide on multiple values for the independent variable 3) There... more

Follows • 1

Answers •1

Chemistry

10/06/22

Which of the following is false ( about independent, controlled variables etc. in an experiement)

Which of the following statements is false?1) In an experiment, there should be multiple values for the one independent variable2) In an experiment, there should be multiple constants or controlled... more

Follows • 1

Answers •1

Chemistry

10/06/22

Assuming complete precipitation, calculate the final concentration of each ion. If the ion is no longer in solution, enter a 0 for the concentration.

A 165.0 mL165.0 mL solution of 2.418 M2.418 M strontium nitrate is mixed with 205.0 mL205.0 mL of a 2.465 M2.465 M sodium fluoride solution. Calculate the mass of the resulting strontium... more

Follows • 2

Answers •1

Chemistry

10/06/22

What is the electrostatic potential energy (in joules) between two protons that are separated by 72 pm ?

I need the answer in Joules to 2 significant figures.

Follows • 1

Answers •1

Chemistry

10/05/22

A proton in a linear accelerator has a de Broglie wavelength of 141 pm .

What is the speed of the proton? (The mass of the proton is 1.673×10−271.673×10−27 kgkg and 1 JJ = 1 (kg⋅m2)/s2(kg⋅m2)/s2.)

Follows • 1

Answers •1

Chemistry

10/05/22

What mass of aluminum (in g) would be required to completely react with 1.60 L of 0.350 M HCl in the following chemical reaction? 2 Al(s) + 6 HCl(aq) → 2 AlCl₃ (aq) + 3 H₂(g)

Follows • 1

Answers •1

During the processing of black-and-white photographic film, excess silver(I) halides are removed by washing the film in a bath containing sodium thiosulfate.

What two points should be plotted to graphically determine the activation energy of this reaction? To avoid rounding errors, use at least three significant figures in all values.

How would you find it?

Consider the four scenarios involving visible light.

A hypothetical molecule, X–Y, has a dipole moment of 1.27 D and a bond length of 139 pm. Calculate the percent ionic character of this molecule.

K to relative abundance reactants, products

reversible reaction

What is the pH at the start of the titration, before any barium hydroxide has been added?

Solve for Concentration

What is the value for Kc

A student records the masses of several paper clips. Use the data in the table below to the standard deviation of the mean mass of a paper clip (in grams).

How much will be left? Round your answer to the nearest 0.1 mol

Which of the following statements are true and which are false? A sigma molecular orbital may

Calculate ΔH for the neutralization of HCl(aq) by NaOH(s) using Hess's Law

For the following reaction, 10.3 grams of nitrogen gas are allowed to react with 1.17 grams of hydrogen gas.

What is the equilibrium constant (K) for this dissolution of potassium bitartrate?

Write balanced equations for the equilibria for HPO42- reacting with HNO and with NO1-

An electron in a hydrogen atom relaxes to the n = 4 level, emitting light of 114 THz. What is the value of n for the level in which the electron originated?

Chemistry 120 Lab Question

(True / False) question about experiments and variables / data

Which of the following is false ( about independent, controlled variables etc. in an experiement)

Assuming complete precipitation, calculate the final concentration of each ion. If the ion is no longer in solution, enter a 0 for the concentration.

What is the electrostatic potential energy (in joules) between two protons that are separated by 72 pm ?

A proton in a linear accelerator has a de Broglie wavelength of 141 pm .

What mass of aluminum (in g) would be required to completely react with 1.60 L of 0.350 M HCl in the following chemical reaction? 2 Al(s) + 6 HCl(aq) → 2 AlCl₃ (aq) + 3 H₂(g)

Still looking for help? Get the right answer, fast.

OR

Michael S.

IXL

Rosetta Stone

Education.com

TPT

Vocabulary.com

ABCya

SpanishDictionary.com

Inglés.com

Emmersion