11/09/23

biochemical calculation
The measured volumes of hydrogen (4 dm3) and chlorine (3 dm3) were mixed together, then the reaction was started. Calculate the volume of the gases after the reaction.
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11/09/23

biochemical calculation please help me
Find the molar ratio at which N2O and N2O3 were mixed, if we know that 11 dm3 of this mixture reacts with 27 dm3 of hydrogen, and that nitrogen and water are the only products of this reaction.... more
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11/09/23

What is the value of the equilibrium constant at this temperate for the reaction of SO2 with N2O to form SO3 and N2?
At a certain temperature, a 25.5 -L container holds four gases in equilibrium. Their masses are 3.5 g SO3, 4.6 g SO2 , 14.3 g N2, and 0.98 g N2O.What is the value of the equilibrium constant at... more
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11/08/23

basic biochemical calculation
What is the maximal volume of CO2 (at normal conditions) which can be produced if the following reagents are available? a) 1.00 kg of 5.0% hydrochloric acid and 200 g of limestone containing 90% of... more
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11/08/23

biochemical calculations
We have the solution of calcium chloride. The sodium carbonate was added to this solution, which resulted in precipitation of calcium carbonate. this precipitate was then calcinated, and at the end... more
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11/08/23

Electrochemical cell notation, cell potential

The anode half reaction of the cell is : Pb(s) + 2Cl^- <<<<>>> PbCl2 + 2eCathode half reaction: Ag(s) + 2e <<<<>>> 2AgCl(s) + 2Cl-( it wants me to... more
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11/08/23

What is the value of K in this equilibrium?
At equilibrium, an aqueous solution of formic acid (HCHO2) has these concentrations: [H+] =0.0067 M; [CHO2-]= 0.0067 M; and [HCHO2]=0.249 HCHO2(aq) ⇌ H+ (aq) +CHO2- (aq)What is the value of K in... more
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11/08/23

CH3 CH CH2 CH2 Cl Cl
CH3 CH CH2 CH2 ClCl
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11/08/23

Calculating specific heat capacity
A chemist carefully measures the amount of heat needed to raise the temperature of a 835.0 mg sample of a pure substance from 30.2*C to 52.1*C. The experiment shows that 85.9J of heat are needed.... more
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11/08/23

Determine the value of Ksp for AgIO3 by constructing an ICE table, writing the solubility constant expression and solving the expression.

It is found that up to 0.0980 g of AgIO3 dissolves in a 2.00 L of aqueous solution at a certain temperature.
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11/08/23

Determine the molar solubility for BaCO2 by construing an ICE table, writing the solubility constant expression, and solving for molar solubility.

Assume that the solution already contains 1.4x10^-4 M CO3^-2
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11/08/23

Standard potential
A galvanic cell consists of an inert platinum electrode in a solution containing 1.0 M chromium(II) ion and 1.0 M chromium(II) ion, and another inert platinum electrode in a solution containing... more
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11/08/23

what is the molarity

A commercial juice is known to have 140 % of the daily allowance of vitamin C per serving (220 mL). If the daily allowance of vitamin C is 75.0 mg, what is the molarity of vitamin C in this juice... more
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11/07/23

Calculate the molar solubility, s, of this compound.

The Ksp of tin (II) hydroxide, Sn(OH)2, is 5.45 x 10-27 .Calculate the molar solubility, s, of this compound. s= ?M
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11/07/23

Calculate the solubility product Ksp, for BaSO4.
The concentrations of barium and sulfate ions in a saturated aqueous solution of BaSO4 are both 1.05 x 10-5 M. Calculate the solubility product Ksp, for BaSO4.Ksp=?
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11/07/23

You have found Ksp to be 3.4 × 10⁻¹⁰. If solid In₂(SO₄)₃ is added to a solution that already contains 0.150 M In(NO₃)₃, what will the new solubility of the solid be?
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11/06/23

What is the concentration of S2- in equilibrium with MnS(s) (Ksp=4.6x10-14) and 0.062 M Mn2+?

What is the concentration of S2- in equilibrium with MnS(s) (Ksp=4.6x10-14) and 0.062 M Mn2+? [S2-]=? M
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11/06/23

What is the activation energy of the reaction?
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11/06/23

Help with Energy of Phase Change
Determine the total amount of energy in J that is released when an ice cube weighing 8.0 g warms from an initial temperature of -4.70 ∘C to its melting point of 0.00 ∘C and then melts completely.... more
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11/06/23

calculate the mass of Ca(OH)2 in a sample if the calcium hydroxide is neutralized by 22.50mL of 0.500M HCL?
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11/06/23

Chemistry Help!

For the diprotic weak acid H2A, Ka1=3.4x10^-6 and Ka2=8.1x10^-9. What is the pH of 0.0700 M solution of H2A? pH=What are the equilibrium concentration of H2A and A2- in this solution? [H2A]=[A2-]
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11/06/23

Chemistry Help!

If a buffer solution is 0.300 M in a weak base (Kb = 7.6x10^-5) and 0.530M in its conjugate acid, what is the pH?
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11/04/23

Classify each aqueous solution as acidic, base, or neutral at 25 ° C.
Classify each aqueous solution as acidic, base, or neutral at 25 ° C. [H+]=6.1x10-4 [H+]=8.3x10-11 [OH-]=6.1x10-9 pH=1.33 [OH-]=7.6x10-6 pH=12.06 pH=7.00 [H+]=1.0x10-7
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11/03/23

What is the concentration of the H2SO4 solution?
25.00 mL of H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 47.73 mL of a 0.1459 M NaOH solution.What is the concentration of the H2SO4 solution?
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11/03/23

Identify the conjugate acid for each base.

Identify the conjugate acid for each base. Conjugate acid of NH3
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