Newest chemistry Questions | Wyzant Ask An Expert

Chemistry

11/22/23

A student mixes 20mL of 0.19M Ca(NO3)2 and 12 mL of 0.15M Na2CO3. If the student's dry precipitate weighs 0.169 g, what is the percent yield?

Follows • 2

Answers •1

Chemistry

11/22/23

Can someone help me attempt to understand this question?

Given the information: A + B -> 2D DeltaH = 704.7 kJ Delta S = 304.0 J/K C -> D DeltaH = 419.0 kJ Delta S = -205.0 J/KCalculate DeltaG at 298 K for the... more

Follows • 2

Answers •1

Chemistry

11/22/23

What is the quantity of heat (In KJ)

What is the quantity of heat (in kJ) associated with cooling 150.3 g of water from 25.60 °C to ice at -10.70 °C?Csolid = 2.092 J/g* C°Cliquid = 4.184 J/g* C°Tfusion = 0.00C°deltaHfusion = 6.01 KJ/Mol

Follows • 2

Answers •1

Chemistry Biology Psychology Anatomy

11/22/23

Future Dentists: Do you need help with your application and/or mock interview preparation?

Hi!My name is Adrianna and I am in my last few months of dental school and I have spent the last four years mentoring pre-dental students from all walks of life. I am happy to help with personal... more

Follows • 1

Answers •1

Chemistry

11/22/23

A combustion reaction between octane (C8H18) and oxygen produces carbon dioxide and water. If 3.98 mol of octane are burned in a complete combustion, how many moles of carbon dioxide are produced?

Follows • 2

Answers •1

Chemistry

11/21/23

Using the relationship given in part 1, calculate Ecell if [Cu2+] = 1.753 M and [Cr3+] = 0.00143 M, assuming that the temperature remains at 25°C. Give your answer to two places after the decimal.

Using the relationship given in part 1, calculate Ecell if [Cu2+] = 1.753 M and [Cr3+] = 0.00143 M, assuming that the temperature remains at 25°C. Give your answer to two places after the... more

Follows • 2

Answers •1

Chemistry

11/21/23

What mass of precipitate will form if 1.50 L of concentrated Pb ( ClO 3)2 is mixed with 0.750 L of 0.150 M NAI? Assume the reaction goes to completion.

Follows • 2

Answers •1

Chemistry

11/21/23

in the description

sample of 8.49 g of liquid 1‑propanol, C3H8O, is combusted with 55.1 g of oxygen gas. Carbon dioxide and water are the products.Write the balanced chemical equation for the reactionWhat is the... more

Follows • 2

Answers •1

Chemistry

11/21/23

question is in the description

Carbonic acid, H2CO3, has two acidic hydrogens. A solution containing an unknown concentration of carbonic acid is titrated with potassium hydroxide. It requires 29.1 mL of 3.100 M KOH solution to... more

Follows • 2

Answers •1

Chemistry

11/21/23

in the description

The identity of an unknown monoprotic organic acid is determined by titration. A 0.436g sample of the acid is titrated with 0.185 M NaOH. What is the molar mass of the compound if 13.1 mL of the... more

Follows • 2

Answers •1

Chemistry

11/21/23

Given 40 g of N2 and 80 g H2 to produce NH3.

Provide a balance equation. CalcuIate for the theoretical and percentage yield. Determine the limiting reactant, excess reactant, amount in excess for your reaction.

Follows • 1

Answers •1

Chemistry

11/21/23

There is a titration with 100 ml of 0.0349M HClO4 with 0.0175M NaOH. In order to draw the titration curve, the pH at various points when NaOH was added need to be calculated.

A. What is the pH when 0 ml of NaOH was added?B. What is the pH after 100ml of NaOH has been added?C. What is the pH after 210 ml of NaOH?D. Determine the volume at the halfway point and... more

Follows • 1

Answers •1

Chemistry

11/20/23

A 150.0 ml sample of 0.100 M HNO2 is titrated with 0.250 M KOH. The Ka for HNO2 is 4.57*10^-4. Calculate the pH at equivalence point

Follows • 2

Answers •1

Chemistry

11/20/23

Will a precipitate form when there is 1.2910^-2 M Sr+2 and 2.310^-6 M CrO4^2-? The Ksp=4.00*10^-5. What is the formula of the precipitate? Will a precipitate form?

Follows • 2

Answers •1

Chemistry

11/20/23

Calculate the pH of a buffer solution that is 0.0876 M in benzoic acid (HC7H5O2) and 0.565 M in sodium benzoate (NaC7H5O2). For benzoic acid, Ka=6.54*10^-5.

Calculate the pH of a buffer solution as an equilibrium problem and with the henderson-hasselbalch equation.

Follows • 2

Answers •1

Chemistry

11/20/23

the solubility of PbCl2 is 0.232 g per 48.5 ml of solution at 25 degrees C. determine the value of the solubility product constant for PbCl2

Follows • 2

Answers •1

Chemistry

11/20/23

What is the concentration in molarity of a 1.32 L solution that contains 22.5 g of dissolved copper (II) chloride?

If anyone could help it would be nice :). So, I understand to get the concentration in molarity you would need to make 22.5 grams of copper II chloride over the 1.32 solution, multiplying that by 1... more

Follows • 2

Answers •1

Chemistry

11/19/23

chemistry problem

For a He⁺, calculate the wavelength of light (in m) that would be emitted for the orbital transition of n(initial) = 3 to n(final) = 2. Submit an answer to four significant figures. The Rydberg... more

Follows • 2

Answers •1

Chemistry

11/19/23

Chemistry Problem

For a hydrogen atom, calculate the energy of the photon that would be emitted for the orbital transition of n(initial) = 4 to n(final) = 1. The Rydberg constant is 1.09678 x 10⁷ m⁻¹. Report to four... more

Follows • 2

Answers •1

Chemistry

11/18/23

Calculate the Pressure

Calculate the pressure (in atm) of a 6.70 mol sample of methane gas at 350.0 K in a 1.50 L container using the van der Waals equation. For methane, a = 2.25 L²･atm/mol² and b = 0.0428 L/mol.

Follows • 2

Answers •1

Chemistry

11/17/23

Limiting reactant and theoretical/percent yield

A precipitation reaction occurs when 653 mL of 0.888 M Pb(NO3)2 reacts with319 mL of 0.936 M KI, as shown by the following equation.Pb(NO3)2(aq) + 2KI(aq) = PbI2(s) +2KNO3(aq) Identify the limiting... more

Follows • 2

Answers •1

Chemistry

11/17/23

calculate the size of the electric current.

an electric current transports 440 uC of charge in 30.0 minutes. calculate the size of the electric current. Be sure your answer has the correct unit symbol and 3 significant digits.

Follows • 1

Answers •1

Chemistry

11/17/23

Calculate the time this took.

An electric current of 290.0 mA transports 0.90 kC of charge. Calculate the time this took.Be sure your answer has the correct unit symbol and 2 significant digits.

Follows • 1

Answers •1

Chemistry

11/17/23

Calculate the size of electric current that must flow.

Suppose 500. mmol of electrons must be transported from one side of an electrochemical cell to another in 60.0 minutes. Calculate the size of electric current that must flow.Be sure your answer has... more

Follows • 2

Answers •1

Chemistry

11/17/23

What is the coordination number of the metal atom in the [Co(CN)(NH3)(en)2]3+ Complex?

Follows • 1

Answers •1

A student mixes 20mL of 0.19M Ca(NO3)2 and 12 mL of 0.15M Na2CO3. If the student's dry precipitate weighs 0.169 g, what is the percent yield?

Can someone help me attempt to understand this question?

What is the quantity of heat (In KJ)

Future Dentists: Do you need help with your application and/or mock interview preparation?

A combustion reaction between octane (C8H18) and oxygen produces carbon dioxide and water. If 3.98 mol of octane are burned in a complete combustion, how many moles of carbon dioxide are produced?

Using the relationship given in part 1, calculate Ecell if [Cu2+] = 1.753 M and [Cr3+] = 0.00143 M, assuming that the temperature remains at 25°C. Give your answer to two places after the decimal.

What mass of precipitate will form if 1.50 L of concentrated Pb ( ClO 3)2 ﻿ is mixed with 0.750 L of 0.150 ﻿M NAI? Assume the reaction goes to completion.

in the description

question is in the description

in the description

Given 40 g of N2 and 80 g H2 to produce NH3.

There is a titration with 100 ml of 0.0349M HClO4 with 0.0175M NaOH. In order to draw the titration curve, the pH at various points when NaOH was added need to be calculated.

A 150.0 ml sample of 0.100 M HNO2 is titrated with 0.250 M KOH. The Ka for HNO2 is 4.57*10^-4. Calculate the pH at equivalence point

Will a precipitate form when there is 1.29*10^-2 M Sr+2 and 2.3*10^-6 M CrO4^2-? The Ksp=4.00*10^-5. What is the formula of the precipitate? Will a precipitate form?

Calculate the pH of a buffer solution that is 0.0876 M in benzoic acid (HC7H5O2) and 0.565 M in sodium benzoate (NaC7H5O2). For benzoic acid, Ka=6.54*10^-5.

the solubility of PbCl2 is 0.232 g per 48.5 ml of solution at 25 degrees C. determine the value of the solubility product constant for PbCl2

What is the concentration in molarity of a 1.32 L solution that contains 22.5 g of dissolved copper (II) chloride?

chemistry problem

Chemistry Problem

Calculate the Pressure

Limiting reactant and theoretical/percent yield

calculate the size of the electric current.

Calculate the time this took.

Calculate the size of electric current that must flow.

What is the coordination number of the metal atom in the [Co(CN)(NH3)(en)2]3+ Complex?

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

OR

RELATED TOPICS

RELATED QUESTIONS

why does covalent bonds determine the polarity of water?

If a temperature scale were based off benzene.

How much copper wire can be made from copper ore?

RECOMMENDED TUTORS

find an online tutor

What mass of precipitate will form if 1.50 L of concentrated Pb ( ClO 3)2 is mixed with 0.750 L of 0.150 M NAI? Assume the reaction goes to completion.

Will a precipitate form when there is 1.2910^-2 M Sr+2 and 2.310^-6 M CrO4^2-? The Ksp=4.00*10^-5. What is the formula of the precipitate? Will a precipitate form?