J.R. S.

Chemistry

12/05/22

If I have 17 moles of gas at a temperature of 67 °C, and a volume of 88.89 liters, what is the pressure of the gas?

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Chemistry

12/05/22

A 0.820 𝑚 aqueous solution of KBr has a total mass of 70.0 g. What masses of solute and solvent are present?

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Science Chemistry

12/04/22

Can someone please help with this chem question

A mixture of calcium chloride and calcium chlorate was treated according to the procedure used in this exercise. An initial mass of 1.093g of the salt mixture, brought to a constant mass after... more

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Chemistry

12/04/22

Question About Chemistry that I don't understand

Calculate the mass in grams of 1.60×1024 molecules of propylamine. The chemical formula for propylamine is C3H9N.

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Chemistry

12/03/22

A buffer solution is made using a weak acid, HA , that has a p𝐾a of 5 . If the pH of the buffer is 4 , what is the ratio of [A−] to [HA] ?

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Answers •1

Chemistry

12/03/22

Acid Base Titration

How many milligrams of potassium hydrogen phthalate (KHP, C8H5KO4, FW=204.23 g/mol) should be weighed into a flask to standardize approximately 0.05 M NaOH if you wish to use at around 20 mL of... more

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Chemistry

12/03/22

Can you please help me setup this question

A shot of espresso has an average temperature after extraction of 82.2 °C. How many grams of ice at -18 °C are needed to cool the espresso to 0 °C. You can assume that the espresso will have a... more

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Chemistry

12/03/22

A concentration cell is set up using two zinc wires and two solution, one containing 0.450 M ZnCl2 solution and the other containing 1.30 M Zn(NO3)2 solution. Compute the potential of this cell.

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Chemistry

12/03/22

What is the activation energy of the reaction?

The diagram shows the energy change over the course of a reaction.Is the reaction endothermic or exothermic?exothermicendothermicWhat is the activation energy of the reaction?activation energy:kJ/mol

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Chemistry

12/02/22

3 x 10^8 tons of ozone naturally form and decompose every day in the stratosphere. Ozone decomposition is naturally activated by UV radiation with wavelengths around 280 nm (UV-B radiation).

Use the information provided to estimate the energy required (in kJ/mol) to initiate the decomposition of ozone molecules.

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Chemistry

12/02/22

Complete and balance the following half-reaction in acidic solution. Be sure to include the proper phases for all species within the reaction

Sn^2+ (aq) --> Sn^4+ (aq)I know to add H20 on the reactants and H on products but I'm stuck and don't know why.

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Chemistry

12/01/22

At what pressure does the hydrocarbon C₂H₆ have a density of 2.50 g/L at 25.0 °C?

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Math Science English

12/01/22

How to calculate the Percentage of moisture loss

Hello,i know this might be simple, but i need help so i know how to do it going forward. I did an experiment and here are my data. The sample is a dry ingredient. Weigh of tray= 6.40g weigh of... more

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Chemistry

12/01/22

A buffer solution is 0.374 M in and 0.275 M in . If ka for HClO is 3.5 x 10^-8 , what is the pH of this buffer solution?

what is the ph

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Chemistry

12/01/22

Hydrogen sulfide (H2S) reacts with oxygen (O2) to produce sulfur dioxide (SO2) and water. How many grams of SO2 will be produced if 100 g of H2S react with 100 g of O2?

Limiting Reactant A

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Chemistry

12/01/22

Hydrazine (N2H4) decomposes to produce N2 and NH3. How many molecules of N2 will be formed if 60 molecules of N2H4 decompose into H2 and NH3?

Products equation

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Chemistry

12/01/22

please help with chem problem. The alkene below has two double bonds (#1 and #2), what is each bond: cis, trans, or neither?

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Chemistry

12/01/22

[H+]=0.0039 M ; [CHO−2]=0.0039 M ; and [HCHO2]=0.0845 M. HCHO2(aq)↽−−⇀H+(aq)+CHO−2(aq)

At equilibrium, an aqueous solution of formic acid (HCHO2) has these concentrations: [H+]=0.0039 M; [CHO−2]=0.0039 M; and [HCHO2]=0.0845 M.HCHO2(aq)↽−−⇀H+(aq)+CHO−2(aq)What is the value of K of... more

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Chemistry

12/01/22

aqueous solution of CaCO3 are both 9.33×10−5 M . Calculate the solubility product, 𝐾sp , for CaCO3 .

the concentrations of calcium and carbonate ions in a saturated aqueous solution of CaCO3 are both 9.33×10−5 M. Calculate the solubility product, 𝐾sp, for CaCO3.

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Chemistry

12/01/22

2H2O(g)↽−−⇀2H2(g)+O2(g) 2 ⁢ H 2 O ( g ) ⁢ ↽ − − ⇀ ⁢ 2 ⁢ H 2 ⁡ ( g ) + O 2 ⁡ ( g ) reach 0.0250 atm, 0.00550 atm, and 0.00400 atm

The elementary reaction 2H2O(g)↽−−⇀2H2(g)+O2(g)proceeds at a certain temperature until the partial pressures of H2O, H2, and O2 reach 0.0250 atm, 0.00550 atm, and 0.00400 atm, respectively. What is... more

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Chemistry

12/01/22

Ag2CO3 , the silver ion concentration is 2.53×10−4 M and the carbonate ion concentration is 1.27×10−4 M. Calculate the solubility product, 𝐾sp , for Ag2CO3 .

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Chemistry

12/01/22

Why don't all metals react with bases?

Isn't it just like displacement reaction?

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Chemistry

12/01/22

Complete and balance the precipitation reactions. Include physical states. Refer to the solubility rules. K3PO4(aq)+MgCl2(aq)⟶ as necessary.

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Chemistry

12/01/22

The decomposition of a generic diatomic element in its standard state is represented by the equation

1/2X2(g)⟶X(g)Assume that the standard molar Gibbs energy of formation of X(g) is 5.46 kJ·mol−1 at 2000. K and −47.29 kJ·mol−1 at 3000. K. Determine the value of the thermodynamic equilibrium... more

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Chemistry

12/01/22

A reaction has a standard free‑energy change of −16.90 kJ mol−1(−4.039 kcal mol−1). Calculate the equilibrium constant for the reaction at 25 °C.

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Answers •1

If I have 17 moles of gas at a temperature of 67 °C, and a volume of 88.89 liters, what is the pressure of the gas?

A 0.820 𝑚 aqueous solution of KBr has a total mass of 70.0 g. What masses of solute and solvent are present?

Can someone please help with this chem question

Question About Chemistry that I don't understand

A buffer solution is made using a weak acid, HA , that has a p𝐾a of 5 . If the pH of the buffer is 4 , what is the ratio of [A−] to [HA] ?

Acid Base Titration

Can you please help me setup this question

A concentration cell is set up using two zinc wires and two solution, one containing 0.450 M ZnCl2 solution and the other containing 1.30 M Zn(NO3)2 solution. Compute the potential of this cell.

What is the activation energy of the reaction?

3 x 10^8 tons of ozone naturally form and decompose every day in the stratosphere. Ozone decomposition is naturally activated by UV radiation with wavelengths around 280 nm (UV-B radiation).

Complete and balance the following half-reaction in acidic solution. Be sure to include the proper phases for all species within the reaction

At what pressure does the hydrocarbon C₂H₆ have a density of 2.50 g/L at 25.0 °C?

How to calculate the Percentage of moisture loss

A buffer solution is 0.374 M in and 0.275 M in . If ka for HClO is 3.5 x 10^-8 , what is the pH of this buffer solution?

Hydrogen sulfide (H2S) reacts with oxygen (O2) to produce sulfur dioxide (SO2) and water. How many grams of SO2 will be produced if 100 g of H2S react with 100 g of O2?

Hydrazine (N2H4) decomposes to produce N2 and NH3. How many molecules of N2 will be formed if 60 molecules of N2H4 decompose into H2 and NH3?

please help with chem problem. The alkene below has two double bonds (#1 and #2), what is each bond: cis, trans, or neither?

[H+]=0.0039 M ; [CHO−2]=0.0039 M ; and [HCHO2]=0.0845 M. HCHO2(aq)↽−−⇀H+(aq)+CHO−2(aq)

aqueous solution of CaCO3 are both 9.33×10−5 M . Calculate the solubility product, 𝐾sp , for CaCO3 .

2H2O(g)↽−−⇀2H2(g)+O2(g) 2 ⁢ H 2 O ( g ) ⁢ ↽ − − ⇀ ⁢ 2 ⁢ H 2 ⁡ ( g ) + O 2 ⁡ ( g ) reach 0.0250 atm, 0.00550 atm, and 0.00400 atm

Ag2CO3 , the silver ion concentration is 2.53×10−4 M and the carbonate ion concentration is 1.27×10−4 M. Calculate the solubility product, 𝐾sp , for Ag2CO3 .

Why don't all metals react with bases?

Complete and balance the precipitation reactions. Include physical states. Refer to the solubility rules. K3PO4(aq)+MgCl2(aq)⟶ as necessary.

The decomposition of a generic diatomic element in its standard state is represented by the equation

A reaction has a standard free‑energy change of −16.90 kJ mol−1(−4.039 kcal mol−1). Calculate the equilibrium constant for the reaction at 25 °C.

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J.R. S.

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Emmersion

If I have 17 moles of gas at a temperature of 67 °C, and a volume of 88.89 liters, what is the pressure of the gas?

A 0.820 𝑚 aqueous solution of KBr has a total mass of 70.0 g. What masses of solute and solvent are present?

Can someone please help with this chem question

Question About Chemistry that I don't understand

A buffer solution is made using a weak acid, HA , that has a p𝐾a of 5 . If the pH of the buffer is 4 , what is the ratio of [A−] to [HA] ?

Acid Base Titration

Can you please help me setup this question

A concentration cell is set up using two zinc wires and two solution, one containing 0.450 M ZnCl2 solution and the other containing 1.30 M Zn(NO3)2 solution. Compute the potential of this cell.

What is the activation energy of the reaction?

3 x 10^8 tons of ozone naturally form and decom­pose every day in the stratosphere. Ozone decomposition is naturally activated by UV radiation with wavelengths around 280 nm (UV-B radiation).

Complete and balance the following half-reaction in acidic solution. Be sure to include the proper phases for all species within the reaction

At what pressure does the hydrocarbon C₂H₆ have a density of 2.50 g/L at 25.0 °C?

How to calculate the Percentage of moisture loss

A buffer solution is 0.374 M in and 0.275 M in . If ka for HClO is 3.5 x 10^-8 , what is the pH of this buffer solution?

Hydrogen sulfide (H2S) reacts with oxygen (O2) to produce sulfur dioxide (SO2) and water. How many grams of SO2 will be produced if 100 g of H2S react with 100 g of O2?

Hydrazine (N2H4) decomposes to produce N2 and NH3. How many molecules of N2 will be formed if 60 molecules of N2H4 decompose into H2 and NH3?

please help with chem problem. The alkene below has two double bonds (#1 and #2), what is each bond: cis, trans, or neither?

[H+]=0.0039 M ; [CHO−2]=0.0039 M ; and [HCHO2]=0.0845 M. HCHO2(aq)↽−−⇀H+(aq)+CHO−2(aq)

aqueous solution of CaCO3 are both 9.33×10−5 M . Calculate the solubility product, 𝐾sp , for CaCO3 .

2H2O(g)↽−−⇀2H2(g)+O2(g) 2 ⁢ H 2 O ( g ) ⁢ ↽ − − ⇀ ⁢ 2 ⁢ H 2 ⁡ ( g ) + O 2 ⁡ ( g ) reach 0.0250 atm, 0.00550 atm, and 0.00400 atm

Ag2CO3 , the silver ion concentration is 2.53×10−4 M and the carbonate ion concentration is 1.27×10−4 M. Calculate the solubility product, 𝐾sp , for Ag2CO3 .

Why don't all metals react with bases?

Complete and balance the precipitation reactions. Include physical states. Refer to the solubility rules. K3PO4(aq)+MgCl2(aq)⟶ as necessary.

The decomposition of a generic diatomic element in its standard state is represented by the equation

A reaction has a standard free‑energy change of −16.90 kJ mol−1(−4.039 kcal mol−1). Calculate the equilibrium constant for the reaction at 25 °C.

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

OR

J.R. S.

3 x 10^8 tons of ozone naturally form and decompose every day in the stratosphere. Ozone decomposition is naturally activated by UV radiation with wavelengths around 280 nm (UV-B radiation).