J.R. S.

Chemistry

09/23/21

20.0g sample of Al reacts to produce 32.7g of Al2O3, what is the percentage yield of the reaction

reaction; 4al(s) + 30,2(g) ----- 2Al,2O,3

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Chemistry

09/23/21

A 0.0310 M solution of an organic acid has an [H+] of 1.55×10-3 M .

Using the values above, calculate the pH of the solution.What is the percent ionization of the acid?Calculate the Ka value of the acid.

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Chemistry Organic Chemistry

09/23/21

chemistry problem

1.28g H2 is allowed to react with 10.5g N2 , producing 2.96g NH3? What is the theoretical yield for this reaction under the given conditions? and What is the percent yield for this reaction under... more

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Chemistry ;

09/23/21

Calculate the molarity of each of the following solutions:

(a) 31.5 g of ethanol (C2H5OH) in 4.30 × 102mL of solution(b) 13.2 g of sucrose (C12H22O11) in 76.5 mL of solution(c) 8.60 g of sodium chloride (NaCl) in 76.8 mL of solution

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Chemistry

09/23/21

For the reaction 3 A + 4 B → 2 C + D, what is the magnitude of the rate of change for [B] when [D] is increasing at 2.7 M/min?

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Chemistry

09/23/21

If n = 3, (a) List all the l values (b) For each of the l values list ml values (c) Draw all the atomic orbitals with l = 2 values

If n = 3, (a) List all the l values (b) For each of the l values list ml values(c) Draw all the atomic orbitals with l = 2 values

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Chemistry

09/23/21

Write the balanced chemical equation for the reaction. Include physical states.

Aqueous sodium carbonate reacts with chromium(II) bromide to form aqueous sodium bromide and solid chromium(II) carbonate.Write the balanced chemical equation for the reaction. Include... more

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Chemistry

09/23/21

Chemistry Chapter 3 HW

Assume such an instrument has been adjusted to detect quanta that have 3.25 x 10–16 J of energy. What is the wavelength of the detected radiation? Give your answer in nanometers.

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Math Chemistry

09/22/21

Solve Chemistry Problem With Factor Label Method

A gold bar has a mass of 530,000 mg. The bar has a length of 5.2 cm a width of 2.1 cm and a density of 19.3 g/cm^3 Determine the height of the bar in millimeters. Show all work.

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Chemistry

09/22/21

Leucine is an amino acid with the formula C6H13NO2 . Determine the number of moles of carbon in 35.33 g of leucine.

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Chemistry

09/22/21

A sample of trifluoroacetic acid, C2HF3O2, contains 49.3 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.

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Chemistry

09/22/21

Chemistry Question

If a system has 5.00×10^2 kcal of work done to it, and releases 5.00×10^2 kJ of heat into its surroundings, what is the change in internal energy (Δ𝐸 or Δ𝑈) of the system?

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Chemistry

09/22/21

172% of titration

Titrate a 0.05 M solution of 87 cm3 of monovalent strong base with 0.1 M HCl. What is the pH of the solution at 118% titration?

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Chemistry

09/22/21

If the frequency factor is 1.2×10^13s−1, what is the activation barrier?

The rate constant of a reaction at 32 was measured to be 5.2×10−2 .

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Chemistry

09/22/21

Find the concentration of NO and Cl2 .

At 473 K, for the elementary reaction 2NOCl(g)k1⇌k−12NO(g)+Cl2(g) k1=7.8×10−2L/mols and k−1=4.7×102L2/mol2s A sample of NOCl is placed in a container and heated to 473 K. When the system comes to... more

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Chemistry Physics

09/22/21

Conversion of SI units by using dimensional analysis

1.) 525,000 mcg to dag 2.) 0.000215 daL to ul 3.) 0.0001 dm to nm 4.) 254,325 cm to um

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Chemistry Pharmacology

09/22/21

The product of biotechnology, filgrastim (NEUPOGEN ), is available in vials containing 0.3 mg of drug in each milliliter. Which choice is equivalent in concentration?

(a) 0.03 mg/0.1 dL (b) 300 mcg/0.01 dL (c) 3 mcg/0.01 cL (d) 300 mcg/10 cL - Show the solution(s) by using equivalent expressions.

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Chemistry Intro To Chemistry Laboratory

09/21/21

Chemistry Lab Questions (Calorimetry)

Candy bar has a total mass of 75.0 grams. In a calorimetry experiment, a 1.0-g sample of this candy bar was burned in a calorimeter using 1000g of water. The temperature of the water in contact... more

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Chemistry

09/21/21

How many grams of NH3 are needed to provide the same number number of molecules as in 0.95 g of SF6

How many grams of NH3 are needed to provide the same number number of molecules as in 0.95 g of SF6?

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Chemistry

09/21/21

Determine the number of moles

Glycine is an amino acid with the formula C2H5NO2. Determine the number of moles of carbon in 81.77g of glycine.

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Chemistry

09/21/21

A sample of trifluoroacetic acid

A sample of trifluoroacetic acid, C2HF3O2, contains 54.5 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.

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Chemistry

09/21/21

Please Help! With these question

For the following reaction, 0.372 grams of hydrogen gas are allowed to react with 50.1 grams of iodine.hydrogen(g) + iodine(s) hydrogen iodide(g)What is the maximum mass of hydrogen iodide that... more

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Chemistry

09/21/21

Please Help! With these question

For the following reaction, 0.372 grams of hydrogen gas are allowed to react with 50.1 grams of iodine.hydrogen(g) + iodine(s) hydrogen iodide(g)What is the maximum mass of hydrogen iodide that... more

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Math Chemistry

09/21/21

Help answer this??

You have prepared a solution by diluting 10.00mL of 0.961M copper(II) nitrate to a total volume of 50.00mL. What is the concentration of Cu2+ ions in the resulting solution? Report your answer to... more

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Chemistry

09/21/21

Molecules moving in a rigid box cause pressure on the sides of the box. Pick from the following the list of factors which will affect the pressure of the gas in the box.

Options: Number of molecules, temperature, and color of gas Number of molecules, speed of molecules, and color of gas Temperature, size of the box, and number of molecules Color of the gas, size... more

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20.0g sample of Al reacts to produce 32.7g of Al2O3, what is the percentage yield of the reaction

A 0.0310 M solution of an organic acid has an [H+] of 1.55×10-3 M .

chemistry problem

Calculate the molarity of each of the following solutions:

For the reaction 3 A + 4 B → 2 C + D, what is the magnitude of the rate of change for [B] when [D] is increasing at 2.7 M/min?

If n = 3, (a) List all the l values (b) For each of the l values list ml values (c) Draw all the atomic orbitals with l = 2 values

Write the balanced chemical equation for the reaction. Include physical states.

Chemistry Chapter 3 HW

Solve Chemistry Problem With Factor Label Method

Leucine is an amino acid with the formula C6H13NO2 . Determine the number of moles of carbon in 35.33 g of leucine.

A sample of trifluoroacetic acid, C2HF3O2, contains 49.3 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.

Chemistry Question

172% of titration

If the frequency factor is 1.2×10^13s−1, what is the activation barrier?

Find the concentration of NO and Cl2 .

Conversion of SI units by using dimensional analysis

The product of biotechnology, filgrastim (NEUPOGEN ), is available in vials containing 0.3 mg of drug in each milliliter. Which choice is equivalent in concentration?

Chemistry Lab Questions (Calorimetry)

How many grams of NH3 are needed to provide the same number number of molecules as in 0.95 g of SF6

Determine the number of moles

A sample of trifluoroacetic acid

Please Help! With these question

Please Help! With these question

Help answer this??

Molecules moving in a rigid box cause pressure on the sides of the box. Pick from the following the list of factors which will affect the pressure of the gas in the box.

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