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Chemistry

03/18/23

What mass of carbon dioxide is produced from the complete combustion of 8.40x10-3g of methane

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Chemistry Science

03/18/23

need help with chem pH question please

A)Determine the pH and percent dissociation of a 0.183M propionic (CH3CH2COOH) acid solution. Begin by writing the balanced chemical equation. B) A portion of the above propionic acid solution was... more

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Chemistry

03/18/23

Chemistry problems help

Consider a galvanic cell based on the half reactions:Fe2+ (aq) + 2e^- -> Fe (s) Ered = - 0.447 V2H+ (aq) + 2e^- -> H2 (g) Ered = 0.000 VThe iron compartment contains an iron electrode in a... more

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Chemistry

03/18/23

Calculate either [H3O+] or [OH−] for each of the solutions at 25 °C.

Solution A: [OH−]=2.97×10−7 M; [H3O+]=M?Solution B: [H3O+]=8.37×10−9 M; [OH−]=M?Solution C: [H3O+]=7.51×10−4 M; [OH−]=M?

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Chemistry

03/18/23

Chemistry question

A sample containing 7.60 g O2 gas has a volume of 27.0 L . Pressure and temperature remain constant What is the new volume if 0.700 mole O2 gas is added

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Chemistry

03/18/23

Chemistry problems help

Consider a galvanic cell based on the half reactions:Fe2+ (aq) + 2e^- -> Fe (s) Ered = - 0.447 V2H+ (aq) + 2e^- -> H2 (g) Ered = 0.000 VThe iron compartment contains an iron electrode in... more

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Chemistry

03/18/23

What is the maximum amount of Na3PO4 that is formed from the reaction of 25.00 mL of 0.1050 M NaOH and 15.00 mL of 0.08650 M H3PO4?

NaOH + H3PO4 → Na3PO4 + H2OFor the second part,What is the molarity of Na3PO4 in the solution prepared in the previous problem?

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Chemistry Science

03/18/23

need help with calculating the pH of the following...

Determine the pH for the following solutions. Show your work to support your answer:a. 0.227M HCl b. 0.186M NH3 c. 0.088M KHCO3

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Chemistry

03/18/23

chemistry help please!

Consider the following reaction:SO2 + 2 H2S → 3 S + 2 H2OIf 4.95 g of SO2 reacts via this reaction in excess H2S, what mass (in g) of H2O will be produced?

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Chemistry

03/17/23

If 20.0 grams of magnesium react with excess hydrochloric acid, how many grams of magnesium chloride are produced? __________

Mg + 2 HCl -------> MgCl2 + H2(step by step would be appreciated)

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Chemistry

03/17/23

Calculate the pH of a solution that has a hydroxide ion concentration, [OH−] , of 8.30×10−5 M.

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Chemistry

03/17/23

Calculate the pH of a solution that has a hydroxide ion concentration, [OH−] , of 8.30×10−5 M.

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Chemistry

03/17/23

Calculate either [H3O+] or [OH−] for each of the solutions at 25 °C.

Solution A: [OH^−] =2.97×10^−7 M; [H3O^+] = MSolution B: [H3O^+] =8.37×10^−9 M; [OH−] = MSolution C: [H3O^+] =7.51×10^−4 M; [OH−] = M

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Chemistry

03/17/23

In older airbags a crash triggers the decomposition of NaN3 to form elemental sodium and nitrogen gas, which fills the airbag. How many moles of N2 gas are produced when 154.7 g NaN3 decomposes?

Whole Question: The deployment of airbags during a car accident results from a chemical reaction that, until the 1990s, involved sodium azide, NaN3. Sodium azide has since been replaced by less... more

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Chemistry

03/17/23

What is the molar solubility of AgCl (Ksp = 1.80 × 10⁻¹⁰) in 0.390 M NH₃? (Kf of Ag(NH₃)₂⁺ is 1.7 × 10⁷)

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Chemistry

03/17/23

What is the solubility of Mg(OH)₂ at a pH of 12.10? (Ksp Mg(OH)₂ is 1.6 × 10⁻¹³)

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Chemistry

03/17/23

What is the solubility of La(IO₃)₃ in a solution that contains 0.200 M La³⁺ ions? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)

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Chemistry

03/17/23

fill in the ice tables

a student was titrating a solution of hydrazine, H2NNH2, with a strong acid solution. determine the pH at a particular point in the titration. do this by constructing a BCA table, constructing an... more

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Chemistry

03/17/23

what is the concentration of B at equilibrium?

Consider the reaction.A(aq)↽−−⇀3B(aq) c=8.50×10−6 at 500 KIf a 2.50 M sample of A is heated to 500 K, what is the concentration of B at equilibrium?[B]=??

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Chemistry

03/17/23

Calculate the equilibrium constant, Kc.

At a certain temperature, 0.4011 mol of N2 and 1.501 mol of H2 are placed in a 4.50 L container.N2(g)+3H2(g)↽−−⇀2NH3(g)At equilibrium, 0.1401 mol of N2 is present. Calculate the equilibrium... more

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Chemistry

03/17/23

Calculate the theoretical yield and % yield of copper.

EX: Aluminum was reacted with copper(II) chloride according to the following reaction: 2 Al(s) + 3 CuCl2(aq) → 2 AlCl3(aq) + 3 Cu(s) Mass of aluminum (g) 3.35 Mass of copper(II) chloride... more

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Chemistry

03/17/23

If the percent yield is 83.4%, what mass of oxygen is needed to produce 125g of HCN?

Hydrogen cyanide gas is produced by reacting ammonia gas, oxygen gas, and methane gas according to the reaction below. If the percent yield is 83.4%, what mass of oxygen is needed to produce 125g... more

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Chemistry

03/16/23

A 25.0 mL solution of KOH is neutralized with 30.5 mL of 0.100 M HBr. What is the concentration of the original KOH solution?

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Chemistry

03/16/23

A 25.0 mL solution of HCl is neutralized with 16.7 mL of 0.115 M Sr(OH)₂. What is the concentration of the original HCl solution?

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Chemistry

03/16/23

r the following combustion reaction CH₃CWhen a 7.52-g sample of butyric acid (molar mass = 88.10 g/mol) is burned, how much energy (in kJ) is released as heat?

For the following combustion reaction CH₃CH₂CH₂COOH(l) + 5O₂(g) → 4CO₂(g) + 4H₂O(g) ∆H = -2.18 × 10³ kJ When a 7.52-g sample of butyric acid (molar mass = 88.10 g/mol) is burned, how much energy... more

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What mass of carbon dioxide is produced from the complete combustion of 8.40x10-3g of methane

need help with chem pH question please

Chemistry problems help

Calculate either [H3O+] or [OH−] for each of the solutions at 25 °C.

Chemistry question

Chemistry problems help

What is the maximum amount of Na3PO4 that is formed from the reaction of 25.00 mL of 0.1050 M NaOH and 15.00 mL of 0.08650 M H3PO4?

need help with calculating the pH of the following...

chemistry help please!

If 20.0 grams of magnesium react with excess hydrochloric acid, how many grams of magnesium chloride are produced? __________

Calculate the pH of a solution that has a hydroxide ion concentration, [OH−] , of 8.30×10−5 M.

Calculate the pH of a solution that has a hydroxide ion concentration, [OH−] , of 8.30×10−5 M.

Calculate either [H3O+] or [OH−] for each of the solutions at 25 °C.

In older airbags a crash triggers the decomposition of NaN3 to form elemental sodium and nitrogen gas, which fills the airbag. How many moles of N2 gas are produced when 154.7 g NaN3 decomposes?

What is the molar solubility of AgCl (Ksp = 1.80 × 10⁻¹⁰) in 0.390 M NH₃? (Kf of Ag(NH₃)₂⁺ is 1.7 × 10⁷)

What is the solubility of Mg(OH)₂ at a pH of 12.10? (Ksp Mg(OH)₂ is 1.6 × 10⁻¹³)

What is the solubility of La(IO₃)₃ in a solution that contains 0.200 M La³⁺ ions? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)

fill in the ice tables

what is the concentration of B at equilibrium?

Calculate the equilibrium constant, Kc.

Calculate the theoretical yield and % yield of copper.

If the percent yield is 83.4%, what mass of oxygen is needed to produce 125g of HCN?

A 25.0 mL solution of KOH is neutralized with 30.5 mL of 0.100 M HBr. What is the concentration of the original KOH solution?

A 25.0 mL solution of HCl is neutralized with 16.7 mL of 0.115 M Sr(OH)₂. What is the concentration of the original HCl solution?

r the following combustion reaction CH₃CWhen a 7.52-g sample of butyric acid (molar mass = 88.10 g/mol) is burned, how much energy (in kJ) is released as heat?

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