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Chemistry

10/28/23

What is the [OH^-] of [H3O^+]= 2.0 • 10^-9 M

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Chemistry

10/28/23

Solving limiting reactant problems in solution

Suppose 2.77g of iron(II) iodide is dissolved in 200.mL of a 68.0 m M aqueous solution of silver nitrate. Calculate the final molarity of iron(II) cation in the solution. You can assume the volume... more

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Chemistry

10/28/23

chemistry solution prepare

HOW TO PREPARE:200 ml 0.5 M CH3COONa (you have solid CH3COONa.3H20) (M CH3COONa: 82.03 g/mol)

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Chemistry

10/28/23

ICE tables Chemistry

Determine concentration of hydroxide ion, OH ^- , in a solution of HNO2 by constructing an ICE table, writing the equilibrium constant expression, and using this information to determine the... more

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Chemistry

10/28/23

chemistry calculate pH

Calculate the pH when 90.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10⁻⁴)

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Chemistry

10/28/23

what is the volume of the solution in milliliters?

If 3.90g of CuNO3 is dissolved in water to make a 0.840 M solution, what is the volume of the solution in milliliters? Volume: ? mL

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Chemistry

10/28/23

Solving limiting reactant problems in solution

Suppose 29.0g of sodium chloride is dissolved in 300.mL of a 0.70 M aqueous solution of potassium carbonate. Calculate the final molarity of chloride anion in the solution. You can assume the... more

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Chemistry

10/27/23

6) Calculate the internal energy change when 1 mole of iron is cooled from 45°C to 13°C (specific heat capacity of iron is 0.449 J/g K).

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Chemistry

10/27/23

Write the formation constant expression for the equilibrium between the hydrated metal ion and the aqueous complex.

In aqueous solution the Pb2+ ion forms a complex with four chloride anions.Write the formation constant expression for the equilibrium between the hydrated metal ion and the aqueous complex.Kf = ____

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Chemistry

10/27/23

Calculate the equilibrium molarity of aqueous Pb2+

For the aqueous [PbCI4]2- complex Kf =2.5 x 1015 at 25 °C.Suppose equal volumes of 0.0074M Pb(NO3)2 solution and 0.36M KCI solution are mixed. Calculate the equilibrium molarity of aqueous... more

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Chemistry

10/26/23

In a 0.870 M aqueous solution of a monoprotic acid, 3.51% of the acid is ionized. What is the value of its Ka?

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Chemistry

10/26/23

Calculate the pH of a 2.25×10-4 M solution of codeine if the pKa of the conjugate acid is 8.21.

Codeine is a popular prescription pain killer because it is much less addictive than morphine. Codeine contains a basic nitrogen atom that can be protonated to give the conjugate acid of codeine.... more

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Chemistry

10/26/23

If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.89, determine the [HCHO2] if the [NaCHO2] is 0.735 M.

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Chemistry

10/26/23

percent yield for chemistry

when 100 kg sand are processed with carbon and 51.4 k sic are recovered. what is the percent yield of sic

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Chemistry

10/26/23

percent yield for chemistry

when 100 kg sand are processed with carbon and 51.4 k sic are recovered. what is the percent yield of sic

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Chemistry Calculus Biochemistry

10/26/23

chemistry basic calculation

there is about 50.109 of gold atoms in one drop of a sea water. how many grams of gold can be obtained from 1 tonne of sea water, if we know that the mass of 1 drop is 33 mg.

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Chemistry Biochemistry

10/26/23

chemistry calculation basic

how many moles and how many molecules of lipids is included in one bacteria cell which mass is 2.10-11 gram? We assume that such a cell contains 2% of lipids and that the average molar mass of... more

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Chemistry

10/26/23

Calorimeter question for chemistry

A hot lump of 30.5 g of aluminum at an initial temperature of 69.2 degrees C is placed in a 50.0 mL H_2O initially at 25.0 degrees C and allowed to reach thermal equilibrium. What is the final... more

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Chemistry

10/26/23

What volume in mL of 0.3000 M NaCl solution is required to produce 0.1750 moles of NaCl?

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Chemistry

10/26/23

What quantity in moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a buffer with a pH of 2.90? (Ka for HF is 6.8 × 10⁻⁴)

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Chemistry Biochemistry

10/25/23

chemistry, mass calculation

the radioactive isotope ^60Co can be detected at amount of 10^(-11) g. Calculate the approximate number of cobalt atoms in this mass.

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Chemistry Biochemistry

10/25/23

chemical calculation

a density of gold is 19.3 g/cm cube. How many atoms and how many moles of atoms does the volume equal to 1 mm cube of this metal contain?

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Chemistry

10/25/23

What is the concentration of the HNO3 solution?

Consider the neutralization reaction.2 HNO3(aq) + Ba(OH)2 (aq) —> 2 H2O (I) + Ba(NO3)2 (aq)A 0.120 L sample of an unknown HNO3 solution required 37.9 mL of 0.250 M Ba(OH)2 for complete... more

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Chemistry

10/25/23

Determine the concentration of each of the individual ions in a 0.650 M K2SO4 solution.

K2SO4 is a strong electrolyte. Determine the concentration of each of the individual ions in a 0.650 M K2SO4 solution. [K+]= ?M[ SO2-/4]= ?M

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Chemistry

10/25/23

what is the volume of the solution in milliliters?

If 3.90g of CuNO3 is dissolved in water to make a 0.840 M solution, what is the volume of the solution in milliliters? Volume: ? mL

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Answers •1

What is the [OH^-] of [H3O^+]= 2.0 • 10^-9 M

Solving limiting reactant problems in solution

chemistry solution prepare

ICE tables Chemistry

chemistry calculate pH

what is the volume of the solution in milliliters?

Solving limiting reactant problems in solution

6) Calculate the internal energy change when 1 mole of iron is cooled from 45°C to 13°C (specific heat capacity of iron is 0.449 J/g K).

Write the formation constant expression for the equilibrium between the hydrated metal ion and the aqueous complex.

Calculate the equilibrium molarity of aqueous Pb2+

In a 0.870 M aqueous solution of a monoprotic acid, 3.51% of the acid is ionized. What is the value of its Ka?

Calculate the pH of a 2.25×10-4 M solution of codeine if the pKa of the conjugate acid is 8.21.

If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.89, determine the [HCHO2] if the [NaCHO2] is 0.735 M.

percent yield for chemistry

percent yield for chemistry

chemistry basic calculation

chemistry calculation basic

Calorimeter question for chemistry

What volume in mL of 0.3000 M NaCl solution is required to produce 0.1750 moles of NaCl?

What quantity in moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a buffer with a pH of 2.90? (Ka for HF is 6.8 × 10⁻⁴)

chemistry, mass calculation

chemical calculation

What is the concentration of the HNO3 solution?

Determine the concentration of each of the individual ions in a 0.650 M K2SO4 solution.

what is the volume of the solution in milliliters?

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