J.R. S.

11/15/22

what will be the butadiene concentration after 71.0 min?

Butadiene reacts to form a dimer according to the equation 2C₄H₆(g) → C₈H₁₂(g) The reaction obeys the second order rate law, Rate = k[C₄H₆]², with a rate constant k = 3.68 M⁻¹min⁻¹ at a certain... more

Follows • 2

Answers •1

Science Chemistry

11/15/22

A first order reaction initially contains 3.25 × 10²⁰ molecules. If the reaction has a half-life of 20.0 minutes, how many molecules remain unreacted after 80.0 minutes?

Follows • 2

Answers •1

Science Chemistry

11/15/22

What is the solubility of La(IO₃)₃ in a solution that contains 0.400 M IO₃⁻ ions? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)

I got 8.85 × 10⁻⁵ M but it said that was wrong not sure what I did wrong

Follows • 2

Answers •1

Chemistry

11/15/22

Where does the 408 come from?

2Al(s) + 3I2(s) ==> 2AlI3(s) ... balanced equationUse the stoichiometry of the balanced equation along with dimensional analysis to find the theoretical yield:18.3 g Al x 1 mol Al / 26.98 g x 2... more

Follows • 2

Answers •1

Chemistry

11/15/22

Calculate the molarity of the student's sodium hydroxide solution. Be sure your answer has the correct number of significant digits.

A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs out 40.mg of oxalic acid H2C2O4, a diprotic acid that can be purchased inexpensively in high... more

Follows • 2

Answers •1

Chemistry

11/15/22

For the galvanic (voltaic) cell Cd²⁺(aq) + Fe(s) ⟶ Cd(s) + Fe²⁺(aq) (E° = 0.0400 V), what is the ratio [Fe²⁺]/[Cd²⁺] when E = 0.007 V? Assume T is 298 K

Explain please.

Follows • 2

Answers •1

Chemistry

11/15/22

Photon Calculation

The human eye is able to detect as little as 2.35×10−18 J2.35×10−18 J of green light of wavelength 510 nm. Calculate the minimum number of photons of green light that can be detected by the human... more

Follows • 2

Answers •1

Chemistry

11/14/22

I need help with chem homework. I put the full question below

The complete and balanced reaction for the combustion of octane is shown below. 2 C8H18 (l) + 25 O2 (g) --> 16 CO2 (g) + 18 H2O (g) You have been assigned a mass of octane, look on... more

Follows • 2

Answers •1

Chemistry

11/14/22

A solution is made by dissolving 26.3 g of CH₃NH₃NO₃ in 500.0 mL of water. As CH₃NH₃⁺ is an acid, write the acidic equilibrium equation that exists in solution

Follows • 2

Answers •1

Science Chemistry

11/14/22

Write the balanced equation for the overall reaction in acidic solution.

Consider a galvanic electrochemical cell constructed using Cr/Cr³⁺ and Zn/Zn²⁺ at 25 °C. The following half-reactions are provided for each metal: Cr³⁺(aq) + 3 e⁻ → Cr(s) E°red = -0.744 V Zn²⁺(aq)... more

Follows • 2

Answers •1

Science Chemistry

11/14/22

What is the [Cu²⁺] when the voltage has dropped to 0.729 V? (E⁰ for Cu²⁺/Cu = 0.340 V and E⁰ for Cd²⁺/Cd = -0.400 V.)

A voltaic cell consists of Cu²⁺/Cu and Cd²⁺/Cd half-cells. Each compartment has a volume of 0.500 L with the following initial concentrations: [Cu²⁺] = 1.250 M; [Cd²⁺] = 0.250 M at 25 °C. What is... more

Follows • 2

Answers •1

Science Chemistry

11/14/22

How many grams of silver metal are produced from Ag⁺(aq) in 1.80 h with a current of 3.50 A? (F = 96,500 C/mol)

Follows • 2

Answers •1

Science Chemistry

11/14/22

Determine the current (in A) to produce 4.20 g Ag when Ag⁺(aq) is electrolyzed for 2.00 h. (F = 96,500 C/mol)

Follows • 2

Answers •1

Science Chemistry

11/14/22

For the galvanic (voltaic) cell Cd²⁺(aq) + Fe(s) ⟶ Cd(s) + Fe²⁺(aq) (E° = 0.0400 V), what is the ratio [Fe²⁺]/[Cd²⁺] when E = 0.010 V? Assume T is 298 K

Follows • 2

Answers •1

Science Chemistry

11/14/22

For the electrochemical cell 2 Al(s) + 3 Mn²⁺(aq) ⟶ 2 Al³⁺(aq) + 3 Mn(s) (E° = 0.48 V, [Al³⁺] = 1.0 M), what is the value of E when [ Mn²⁺] = 0.046 M? Assume T is 298 K

I got -0.0108 using Nernst equation but got it wrong.

Follows • 2

Answers •1

Chemistry

11/14/22

What is the final temperature of the solution assuming that no heat is lost?

A solution is made by mixing 249.0mL of ethanol initially at 10.7°C with 249.0 ML of water initially at 24.7°C. The density of ethanol is 0.789g/mL and the density of water is 1.00g/mL. The... more

Follows • 2

Answers •1

Chemistry

11/14/22

What is the percent yield of phosphoric acid if the theoretical yield is 50.0 g and the actual yield is 44.6 g? P4O10 (g) + 6 H2O (l) → 4 H3PO4 (aq)

Follows • 2

Answers •1

Chemistry

11/14/22

A 76.0 g sample of ground water is found to have a lead concentration of 13.07 ppm. Calculate the mass of lead in the sample in milligrams.

Follows • 2

Answers •1

Chemistry

11/14/22

What mass of precipitate (in g) is formed when 45.5 mL of 0.300 M Na₃PO₄ reacts with 57.0 mL of 0.200 M CrCl₃ in the following chemical reaction? Na₃PO₄(aq) + CrCl₃(aq) → CrPO₄(s) + 3 NaCl(aq)

Follows • 2

Answers •1

Chemistry

11/14/22

If 21.4 g of NO and 13.8 g of O₂ are used to form NO₂, how many moles of excess reactant will be left over? 2 NO (g) + O₂ (g) → 2 NO₂ (g)

Follows • 2

Answers •1

Chemistry

11/14/22

Calculate the enthalpy change for the reaction

N2 (g) + 202 (g) —> 2NO2 (g) △Hrxn = ____kJ Give the following information:N2 (g) + O2 (g) —> 2NO(g) △Hrxn = -181 kJ2NO(g) + O2 (g) —> 2NO2 (g) △Hrxn = -115 kJ

Follows • 2

Answers •1

Chemistry

11/13/22

Calculate the volume in milliliters of a 1.3/molL iron(II) bromide solution that contains 50.0g of iron(II) bromide FeBr2

Calculate the volume in milliliters of a 1.3/molL iron(II) bromide solution that contains 50.0g of iron(II) bromide FeBr2. Be sure your answer has the correct number of significant digits.

Follows • 2

Answers •1

Chemistry

11/13/22

a 66.5 ml glass tube weighs 28.0517g when evacuated and 28.1222g when filled with the hydrocarbon gas acetylene at 749.3 mm Hg and 20.02 C

Empty glass tube weighs 28.0517g28.1222g when filled with the hydrocarbon gasweight of gaseous hydrocarbon acetylene = 28.1222g - 28.0517g= 0.0705gFrom ideal gas equation,PV=nRT0.986 atm * 0.0665 L... more

Follows • 2

Answers •1

Chemistry

11/13/22

What volume of 0.220 M ethanol solution contains 1.3×10−2 moles of ethanol?

Molarity= No of moles/ Vol in LVol in L= No of moles/ Molarity= 1.3*10^-2mol/0.220 M = 0.059 L

Follows • 2

Answers •1

Chemistry

11/13/22

Balance the following redox reaction in acid. You must show all your work.

Balance the following redox reaction in acid. You must show all your work.C3H4O23- + Cr6+ → Cr + CO

Follows • 2

Answers •1

what will be the butadiene concentration after 71.0 min?

A first order reaction initially contains 3.25 × 10²⁰ molecules. If the reaction has a half-life of 20.0 minutes, how many molecules remain unreacted after 80.0 minutes?

What is the solubility of La(IO₃)₃ in a solution that contains 0.400 M IO₃⁻ ions? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)

Where does the 408 come from?

Calculate the molarity of the student's sodium hydroxide solution. Be sure your answer has the correct number of significant digits.

For the galvanic (voltaic) cell Cd²⁺(aq) + Fe(s) ⟶ Cd(s) + Fe²⁺(aq) (E° = 0.0400 V), what is the ratio [Fe²⁺]/[Cd²⁺] when E = 0.007 V? Assume T is 298 K

Photon Calculation

I need help with chem homework. I put the full question below

A solution is made by dissolving 26.3 g of CH₃NH₃NO₃ in 500.0 mL of water. As CH₃NH₃⁺ is an acid, write the acidic equilibrium equation that exists in solution

Write the balanced equation for the overall reaction in acidic solution.

What is the [Cu²⁺] when the voltage has dropped to 0.729 V? (E⁰ for Cu²⁺/Cu = 0.340 V and E⁰ for Cd²⁺/Cd = -0.400 V.)

How many grams of silver metal are produced from Ag⁺(aq) in 1.80 h with a current of 3.50 A? (F = 96,500 C/mol)

Determine the current (in A) to produce 4.20 g Ag when Ag⁺(aq) is electrolyzed for 2.00 h. (F = 96,500 C/mol)

For the galvanic (voltaic) cell Cd²⁺(aq) + Fe(s) ⟶ Cd(s) + Fe²⁺(aq) (E° = 0.0400 V), what is the ratio [Fe²⁺]/[Cd²⁺] when E = 0.010 V? Assume T is 298 K

For the electrochemical cell 2 Al(s) + 3 Mn²⁺(aq) ⟶ 2 Al³⁺(aq) + 3 Mn(s) (E° = 0.48 V, [Al³⁺] = 1.0 M), what is the value of E when [ Mn²⁺] = 0.046 M? Assume T is 298 K

What is the final temperature of the solution assuming that no heat is lost?

What is the percent yield of phosphoric acid if the theoretical yield is 50.0 g and the actual yield is 44.6 g? P4O10 (g) + 6 H2O (l) → 4 H3PO4 (aq)

A 76.0 g sample of ground water is found to have a lead concentration of 13.07 ppm. Calculate the mass of lead in the sample in milligrams.

What mass of precipitate (in g) is formed when 45.5 mL of 0.300 M Na₃PO₄ reacts with 57.0 mL of 0.200 M CrCl₃ in the following chemical reaction? Na₃PO₄(aq) + CrCl₃(aq) → CrPO₄(s) + 3 NaCl(aq)

If 21.4 g of NO and 13.8 g of O₂ are used to form NO₂, how many moles of excess reactant will be left over? 2 NO (g) + O₂ (g) → 2 NO₂ (g)

Calculate the enthalpy change for the reaction

Calculate the volume in milliliters of a 1.3/molL iron(II) bromide solution that contains 50.0g of iron(II) bromide FeBr2

a 66.5 ml glass tube weighs 28.0517g when evacuated and 28.1222g when filled with the hydrocarbon gas acetylene at 749.3 mm Hg and 20.02 C

What volume of 0.220 M ethanol solution contains 1.3×10−2 moles of ethanol?

Balance the following redox reaction in acid. You must show all your work.

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

OR

J.R. S.

IXL

Rosetta Stone

Education.com

TPT

Vocabulary.com

ABCya

SpanishDictionary.com

Inglés.com

Emmersion