J.R. S.

Chemistry Biochemistry Organic Chemistry

12/09/21

Draw the individual amino acids that form this tripeptide. Draw the zwitterion forms.

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12/09/21

chemistry question

Write the balanced chemical equation for the complete combustion of gaseous pentane (C₅H₁₂) and then use bond dissociation energy data to calculate the enthalpy change for this reaction. Assume all... more

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Chemistry

12/09/21

How much heat is needed to raise the temperature of 74.0g of octane from 11.4 C to 24.6 C?

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Chemistry

12/08/21

using heat of fusion or vaporization to find the heat needed to melt or boil

Calculate the amount of heat needed to boil 10.5g of methanol (CH3OH), beginning from a temperature of −51.2°C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit... more

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Biology Chemistry

12/08/21

Calculate the number of calories required to condense 45.0 g of steam at 100.°C.

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Biology Chemistry

12/08/21

Calculate the number of calories required to melt 35 g of ice at 0.0°C.

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Biology Chemistry Biochemistry

12/08/21

Calculate the number of calories released when 20.0 g of steam condenses at 100.° C, cools to 0.0°C, and then freezes.

(Hint: this calculation requires three steps.)

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Chemistry

12/08/21

What is the formal charge of Cl− in the perchlorate ion, ClO−4, assuming the Cl−O bonds are all single bonds?

What is the formal charge of CI- in the perchlorate ion, CIO-4 assuming the CI-O bonds are all single bonds?

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Chemistry

12/08/21

how do i solve this problem

The density of copper is 8.92 . What is the volume of 72 grams of copper? Round your answer to the nearest cm3.

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Chemistry

12/08/21

In a redox reaction, which ion would you expect to be more easily reduced?

1) Perchlorate, ClO−42) Hypochlorite ion, ClO-3) Not enough information is given.4) They are equally reducible.

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Chemistry

12/08/21

Write balanced chemical equation for the reaction that occur between hydrochloric acid and magnesium carbonate.

1)A 6.54 sample of a mixture of magnesium carbonate and calcium carbonate is treated with excess hydrochloric acid. The resulting reaction produces 1.74 of carbon dioxide gas at 29 and... more

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Chemistry

12/08/21

Grams of hydrogen and oxygen found in 100 grams of water

Suppose you wanted to make 100 grams of water. How many grams of hydrogen and oxygen will you need?Then justify if your answer is reasonable or not?

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Chemistry

12/08/21

chemistry A question 6

I need help with question 6, please! it asks "Iron has a specific heat capacity of 0.4490j/gdegreeC. An iron nail with a mass of 12.01 grams absorbs 16.18 joules of heat. If its initial temperature... more

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Chemistry

12/08/21

What volume, in Liters, would 250. g of (NH4)2S04 occupy at STP?

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Chemistry

12/08/21

In a system there are 2 gasses: Helium at (1.5atm) and Argon at (0.75atm). A third gas, Neon, is added to the system and the new total pressure is 2.5atm. What is the partial pressure of the Neon?

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Chemistry

12/08/21

If a molecule has 6 protons, 8 neutrons, and 7 electrons. What is the "nuclear" charge of the molecule

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Chemistry

12/07/21

Consider the following reaction: 4Fe+3O2=2Fe2O3

How many grams of oxygen gas are needed to react completely with 44.2 grams of iron

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Chemistry

12/07/21

solving moles to moles limiting reactant problems

Nitrogen dioxide (NO2) gas and liquid water (H2O) react to form aqueous nitric acid (HNO3) and nitrogen monoxide (NO) gas. Suppose you have 11.0 mol of NO2 and 13.0 mol of H2O in a... more

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Science Chemistry Physics

12/07/21

QUESTION ABOUT QUANTUM NUMBERS

what is the n, l, and ml value of the given orbitals below? (quantum numbers) 3p 5f 4d

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Chemistry

12/07/21

Propane (C3H8) reacts with Oxygen gas to produce Carbon dioxide and water. What mass of CO2 will be produced if 8.5 liters of O2 reacts with 2.3 L of C3H8 @STP?

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Chemistry

12/07/21

The heat of fusion of water is 6.01 kJ/mol. The heat capacity of liquid water is 75.3 J/mol ⋅ K. The conversion of 50.0 g of ice at 0.00 °C to liquid water at 15.0°C requires ________ kJ of heat.

The heat of the fusion of water is 6.01 kJ/mol. The heat capacity of liquid water is 75.3 J/mol ⋅ K. The conversion of 50.0 g of ice at 0.00 °C to liquid water at 15.0°C requires ________ kJ of heat.

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Chemistry

12/07/21

Determining the volume of base needed to titrate

A chemistry student weighs out 0.167 g of lactic acid (HC3H5O3) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.0800... more

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Chemistry

12/07/21

using molarity to find solute moles and solution volume

A chemist adds 180.0 mL of a 5.8 mol/L silver nitrate (AgNO3) solution to a reaction flask. Calculate the millimoles of silver nitrate the chemist has added to the flask. Round your answer... more

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Chemistry

12/06/21

Draw the Lewis structure for the molecule Tamiflu, What is the geometry of this molecule? What are the functional groups of this molecule?

I am just overall confused on these questions.

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Chemistry

12/06/21

Which element has the same similarities to Arsenic

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Answers •1

Draw the individual amino acids that form this tripeptide. Draw the zwitterion forms.

chemistry question

How much heat is needed to raise the temperature of 74.0g of octane from 11.4 C to 24.6 C?

using heat of fusion or vaporization to find the heat needed to melt or boil

Calculate the number of calories required to condense 45.0 g of steam at 100.°C.

Calculate the number of calories required to melt 35 g of ice at 0.0°C.

Calculate the number of calories released when 20.0 g of steam condenses at 100.° C, cools to 0.0°C, and then freezes.

What is the formal charge of Cl− in the perchlorate ion, ClO−4, assuming the Cl−O bonds are all single bonds?

how do i solve this problem

In a redox reaction, which ion would you expect to be more easily reduced?

Write balanced chemical equation for the reaction that occur between hydrochloric acid and magnesium carbonate.

Grams of hydrogen and oxygen found in 100 grams of water

chemistry A question 6

What volume, in Liters, would 250. g of (NH4)2S04 occupy at STP?

In a system there are 2 gasses: Helium at (1.5atm) and Argon at (0.75atm). A third gas, Neon, is added to the system and the new total pressure is 2.5atm. What is the partial pressure of the Neon?

If a molecule has 6 protons, 8 neutrons, and 7 electrons. What is the "nuclear" charge of the molecule

Consider the following reaction: 4Fe+3O2=2Fe2O3

solving moles to moles limiting reactant problems

QUESTION ABOUT QUANTUM NUMBERS

Propane (C3H8) reacts with Oxygen gas to produce Carbon dioxide and water. What mass of CO2 will be produced if 8.5 liters of O2 reacts with 2.3 L of C3H8 @STP?

The heat of fusion of water is 6.01 kJ/mol. The heat capacity of liquid water is 75.3 J/mol ⋅ K. The conversion of 50.0 g of ice at 0.00 °C to liquid water at 15.0°C requires ________ kJ of heat.

Determining the volume of base needed to titrate

using molarity to find solute moles and solution volume

Draw the Lewis structure for the molecule Tamiflu, What is the geometry of this molecule? What are the functional groups of this molecule?

Which element has the same similarities to Arsenic

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