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Chemistry

10/02/24

A gold block initially at 62.9°C is put into 120 grams of H2O at 25.8°C in a container. The mixture at thermal equilibrium reached a temperature of 28.3°C. What is the mass of gold used?

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10/02/24

Correct Structure for Diazocyclopentadiene

In a given homework question, there's a question asking to draw the structure for "Diazocyclopentadiene"; will this be the same as for "5-Diazo-1,3-cyclopentadiene" in that it will be a... more

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Chemistry Organic Chemistry

10/02/24

Finding the pH of a solution of Benzoic acid

What is the pH of a 0.050 M solution of benzoic acid (pKa = 4.2)? Please assist by showing the step-by-step computation.

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Chemistry Biochemistry Organic Chemistry

10/01/24

Drawing reasonable reaction mechanisms using curved arrows

Please assist in drawing reasonable reaction mechanisms using curved arrows for the 3 examples of biological reactions given in the attached image:https://ibb.co/sVC1GMt

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Chemistry Organic Chemistry

10/01/24

Drawing of products for given chemical reactions

Please assist in drawing the products of the following reactions (in the attached image), considering regiochemistry where applicable and noting that some reactions may yield multiple... more

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Chemistry

09/29/24

Equilibrium at Certain Temperatures

The Keq for the reaction 2 HI(g) H2(g) + I2(g) has a value of 1.85 x 10-2 at 425°C. If 0.18 mol of HI is placed in a 2.0 L flask and allowed to come to equilibrium at this temperature, what will... more

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Chemistry Physics Physical Science

09/28/24

Introduction to Spectrochemical Methods

Convert the accompanying transmittance data toabsorbances.*(a) 27.2%

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Chemistry Physics Physical Science

09/28/24

Introduction to Spectrochemical Methods

Calculate the wavelength and the energy in joules associated with a signal at 220 MHz.

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Chemistry

09/28/24

Describe the differences between “real” deviations from Beer’s law and those due to instrumental or chemical factors.

I need quick response Introduction to Spectrochemical Methods

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Chemistry

09/27/24

a particular beer is 6.50% ethanol by volume. If a single beer contains 750 ml of beer, what mass in g of ethanol is present in the bottle? The density of ethanol is 0.789 g ethanol/mL.

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Chemistry

09/27/24

The specific heat of water is 4.184J/g°C. How many joules of heat will be removed from 2.00 g of water when its temperature drops by 20°C?

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Answers •1

Chemistry

09/25/24

Equilibrium Calculations

0.2000 mol each of SO2, O2 and SO3 is placed in a 2.000 L flask and allowed to come to equilibrium. The equilibrium [SO2] is found to be 0.0040 mol/L. What is the value of Keqfor the reaction?2... more

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Chemistry

09/25/24

Why is there a greater ozone rate in the summer for suburban habitats?

I guessed that the ozone is trapped in the asphalt and during the summer, the heat causes it to release into the atmosphere.

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Chemistry

09/22/24

Can I add email of my child, so she also gets notification on her email when tutor responds on Wyzant

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Chemistry Physics

09/21/24

Chemistry Quarter Thickness in mm

A quarter is a coin that contains 91.6% by mass copper and 8.33 % by mass nickel. It has a diameter of0.955 inches and density of 7.01 g/cm3. If a single quarter contains 0.183 ounces of copper,... more

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Chemistry

09/19/24

Chemistry dealing with yields

Attempting to make barium phosphate by precipitation when mixing solutions of barium chloride and trisodium phosphate: 3 BaCl2 (aq) + 2 Na3PO4 (aq) → Ba3(PO4)2 (s) + 6 NaCl(aq) 208.33 ... more

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Chemistry

09/19/24

at a certain temperature, 0.351 mol CH4, a d 0.690 mol H2S are placed in 3.50 L container. CH4+2H2S<->CS2+4H2 at equilibrium, 13.9g CS2 is present. Calculate Kc.

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Chemistry

09/18/24

how many grams of NH3 are needed to provide the same number of molecules as in .5 g of SF6

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Chemistry

09/18/24

Broken calorimeter

You have a slightly broken calorimeter. You combust a 10.0g standard that releases exactly 60 kcal of heat inside of the calorimeter filled with 1050 mL of H2O. You measure the initial temperature... more

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Chemistry

09/17/24

determine the molar solubility of copper (I) azide (CuN3) in a solution with a ph of 3.793. Ignore activities. The Ksp for CuN3 is 4.9x10^-9. The Ka for HN3 is 2.2x10^-5

Use systematic treatment of equilibrium

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Answers •1

Chemistry

09/16/24

calculate the atomic mass of element R

Element R has three isotopes. The isotopes are present in 0.0398, 0.1614, and 0.7988 relative abundance. If their masses are 196, 178, and 151 respectively, calculate the atomic mass of element R.... more

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Chemistry

09/15/24

A 11.294 g sample of an unknown hydrate of cobalt(II) bromide is heated until all the water of hydration is removed. The CoBr2 that remains has a mass of 8.0000 g.

How many moles of CoBr2 are in the sample? How many grams of water were lost in the dehydration? How many moles of water were lost? What is the value of "n" in the formula CoBr2 · n H2O? (1, 2, 3,... more

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Chemistry

09/13/24

How many atoms are in .405g of P2O5

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Answers •1

Chemistry

09/11/24

How many atoms of 6Li are there in 12.8 g of 6Li?

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Answers •1

Chemistry Organic Chemistry

09/10/24

Is there a Reaction mechanism for the Recrystallization of benzoic acid from water

After watching a lab practical experiment on the Recrystallization of benzoic acid from water, I'd please like to know is there a reaction mechanism for this?Also, am I correct in saying that the... more

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Answers •1

A gold block initially at 62.9°C is put into 120 grams of H2O at 25.8°C in a container. The mixture at thermal equilibrium reached a temperature of 28.3°C. What is the mass of gold used?

Correct Structure for Diazocyclopentadiene

Finding the pH of a solution of Benzoic acid

Drawing reasonable reaction mechanisms using curved arrows

Drawing of products for given chemical reactions

Equilibrium at Certain Temperatures

Introduction to Spectrochemical Methods

Introduction to Spectrochemical Methods

Describe the differences between “real” deviations from Beer’s law and those due to instrumental or chemical factors.

a particular beer is 6.50% ethanol by volume. If a single beer contains 750 ml of beer, what mass in g of ethanol is present in the bottle? The density of ethanol is 0.789 g ethanol/mL.

The specific heat of water is 4.184J/g°C. How many joules of heat will be removed from 2.00 g of water when its temperature drops by 20°C?

Equilibrium Calculations

Why is there a greater ozone rate in the summer for suburban habitats?

Can I add email of my child, so she also gets notification on her email when tutor responds on Wyzant

Chemistry Quarter Thickness in mm

Chemistry dealing with yields

at a certain temperature, 0.351 mol CH4, a d 0.690 mol H2S are placed in 3.50 L container. CH4+2H2S<->CS2+4H2 at equilibrium, 13.9g CS2 is present. Calculate Kc.

how many grams of NH3 are needed to provide the same number of molecules as in .5 g of SF6

Broken calorimeter

determine the molar solubility of copper (I) azide (CuN3) in a solution with a ph of 3.793. Ignore activities. The Ksp for CuN3 is 4.9x10^-9. The Ka for HN3 is 2.2x10^-5

calculate the atomic mass of element R

A 11.294 g sample of an unknown hydrate of cobalt(II) bromide is heated until all the water of hydration is removed. The CoBr2 that remains has a mass of 8.0000 g.

How many atoms are in .405g of P2O5

How many atoms of 6Li are there in 12.8 g of 6Li?

Is there a Reaction mechanism for the Recrystallization of benzoic acid from water

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