07/27/21

What volume (in mL) of 0.397 mol/L sodium hydroxide, NaOH (aq), is needed to completely neutralize 54.5 mL of 0.349 mol/L sulfuric acid, H2SO4(aq)?
Some commercial drain cleaners use a mixture of sodium hydroxide and aluminum powder. When the solid mixture is poured into the drain and dissolves, a reaction ensues that produces hydrogen... more
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07/27/21

When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced.
12.)When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3(s)+2HCl(aq)⟶CaCl2(aq)+H2O(l)+CO2(g) How many grams of calcium chloride... more
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07/27/21

The pH of a solution of 4.79 mol/L acetic acid

The pH of a solution of 4.79 mol/L acetic acid in water is a.bc
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07/27/21

The [OH-] of a solution of 0.064 mol/L ammonia
a) The [OH-] of a solution of 0.064 mol/L ammonia is a.bcde mol/Lb) The [OH-] of a solution of 3.05 mol/L sodium carbonate is a.bcd mol/L
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07/26/21

Can someone please answer this problem
A sealed container holding 0.0255 L of an ideal gas at 0.995 atm and 69 ∘C is placed into a refrigerator and cooled to 45 ∘C with no change in volume. Calculate the final pressure of the... more
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07/26/21

Can someone please complete this
A sample of an ideal gas has a volume of 3.80 L at 14.80 ∘C and 1.50 atm. What is the volume of the gas at 19.00 ∘C and 0.996 atm? 𝑉= L
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07/26/21

 What is the concentration of the Sn2+ solution?
Part 2: Find the concentration of tin(II) chloride.A sample of pure tin metal is dissolved in nitric acid to produce 15.00 mL of solution containing Sn2+.  When this tin solution is titrated, a... more
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07/26/21

Complete and balance the overall redox reaction, ensure that you include ion charges.
A sample of pure tin metal is dissolved in nitric acid to produce a solution containing Sn2+. This tin solution is then titrated with a solution of KMnO4a.    Complete and balance the overall redox... more
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07/26/21

Calculate the weight percent %(w/w).
The amount of oxalic acid (𝐻2𝐶2𝑂4) in a sample of rhubarb was determined byreacting with 𝐹𝑒3+. After extracting a 10.62 g of rhubarb with a solvent, oxidation of the oxalic acid required 36.44 mL... more
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07/26/21

The pH of a 0.06 M acetic acid solution is? Question 13 options: 11 13 3 1
The pH of a 0.06 M acetic acid solution is?Question 13 options: 11 13 3 1
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07/26/21

Which of the following is the strongest acid? Question 11 options: hypochlorous acid citric acid benzoic acid hydrochloric acid
Which of the following is the strongest acid?Question 11 options: hypochlorous acid citric acid benzoic acid hydrochloric acid
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07/26/21

An aqueous solution is found to have a concentration of H3O+ = 2x10-3 M. What is the OH- concentration? Question 9 options: 5x10-12 2x10-3 2x10-11 4x10-6
An aqueous solution is found to have a concentration of H3O+ = 2x10-3 M. What is the OH- concentration?Question 9 options: 5x10-12 2x10-3 2x10-11 4x10-6
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07/26/21

If the concentration of OH- ions is 2.7x10-9 M, what would the pOH be? Question 6 options: 8.57 8.63 9.43 9.36
If the concentration of OH- ions is 2.7x10-9 M, what would the pOH be?Question 6 options: 8.57 8.63 9.43 9.36
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07/26/21

A weak acid solution of 0.24 M has a pH of 3.49. Determine the Ka value of this weak acid? Question 15 options: 6.4x10-8 4.37x10-7 2x10-6 1.8x10-5
A weak acid solution of 0.24 M has a pH of 3.49. Determine the Ka value of this weak acid?Question 15 options: 6.4x10-8 4.37x10-7 2x10-6 1.8x10-5
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07/26/21

the concentration of Fe2+(aq) solution is a.bcd mol/L.
An iron ore sample containing a mixture of compounds containing Fe3+ (aq) and Fe2+ (aq) is dissolved in acid, which reduces all of the Fe3+ (aq) to Fe2+ (aq). The acidic solution is titrated with... more
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07/26/21

What volume of 0.50 mol/L Na2S2O3 is required to titrate the I2? Give your answer in mL to 1 decimal place. 
A 30 mL sample of 0.40 mol/L bleach solution, NaOCl, is reacted with an excess of KI solution according to the following reaction equation: 2H+ + OCl- + 2I- → Cl- + H2O + I2 The I2 produced is... more
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07/25/21

Find the concentration of [H3O+] in the following acids:
a) The [H3O+] in a solution of 0.20 mol/L methanoic acid is a.bcde mol/Lb) The [H3O+] of a solution of 1.76 mol/L benzoic acid in water is a.bcdef mol/L
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07/24/21

Find the concentration of [OH-] in the following bases:
a) The [OH-] of a solution of 0.078 mol/L ammonia is a.bcde mol/Lb) The [OH-] of a solution of 3.99 mol/L sodium carbonate is a.bcd mol/L
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07/24/21

Can someone please check if my answers to these Chemistry problems are correct?
1. If 2.5 kJ of energy are absorbed, how many grams of Silver are required if the temperature of the Silver was increased by 7.5 oC? (The specific heat of Silver is 0.2330 J/goC.)A. 1.4 gB. 14 gC.... more
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07/24/21

Can someone please help me with these Chemistry problems?
(The answers I got are boxed.) 1. In the equation q = m × c × ΔT, q stands for _______.A. quantityB. qualityC. specific heatD. heat gained or lostE. None of the Above 2. In the equation q = m × c ×... more
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07/24/21

Can someone pease check-over my answers to these Chemistry questions?
1. _______ is the amount of heat necessary to raise the temperature of 1 gram of a substance by 1 degree Kelvin.A. A calorieB. EnergyC. HeatD. Specific heatE. Work 2. _______ is the ability to do... more
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07/24/21

Find the pH and pOH of an acetic acid solution
Acetic (ethanoic) acid is the most common weak acid used in industry.  Determine the pH and pOH of an acetic acid solution prepared by dissolving 60.0 kg of pure, liquid acetic acid, to make 1.25... more
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07/24/21

Find the mass of Hydrogen Chloride gas
What mass of hydrogen chloride gas is required to produce 250 mL of a hydrochloric acid solution with a pH of 1.57?You must show ALL your work to get full marks.
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07/24/21

Equilibrium strong/weak acid calculations

Use the following information to answer the first THREE questions. Nitric acid and nitrous acid are two acids associated with acid deposition.     Acid pH of 0.10 mol/L... more
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07/23/21

Determine the molar mass of the liquid
An organic chemist isolates a colorless liquid from a petroleum sample. He uses the Dumas method and obtains the following data:Volume of flask, V = 213 mLMass of flask: 77.834 gMass of flask + gas... more
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