J.R. S.

03/31/19

Calculate ∆H for the reaction (j)

Calculate ∆H for the reactionN2H4(l) + O2(g) → N2(g) + 2 H2O(l)given the following data: Equation ∆H(kJ) 2 NH3(g) + 3 N2O(g) → 4 N2(g) + 3 H2O(l) -1010 N2O(g) + 3 H2(g) → N2H4(l) +... more

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Chemistry

03/31/19

Consider the reaction (n)

Consider the reactionB2H6(g) + 3 O2(g) → B2O3(s) + 3 H2O(g) ∆H= -2035 kJ/molCalculate the amount of heat released when 43.3 g of diborane is burned.heat released = kJ

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Chemistry General Chemistry

03/30/19

Student A weight 0.747 g of KHP on a laboratory balance.

Student A weight 0.747 g of KHP on a laboratory balance. The KHP was titrated with an unknown NaOH solution and the concentration of the NaOH was determined to be 0.113 M. Student B diluted 6 M HCl... more

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Chemistry

03/30/19

Vinegar is an aqueous solution of acetic acid.

Vinegar is an aqueous solution of acetic acid. By law, it must contain 4 g acetic acid (CH3CO2H 60.05g/mol) per 100 mL solution although it is commonly up to 8% acetic acid. If a 15.00 mL aliquot... more

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Chemistry

03/30/19

the temperature of a 62 g sample of material invreases from 21 C to 41 C when it absorbs 3000 J of energy as heat.

What is the specific heat of this material (round your answers to the nearest thousandth)

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Chemistry

03/30/19

. A 50.00 mL sample of 0.200 M HNO3 was titrated with 0.200 M NaOH. Determine the pH of the solution at the following points during the titration:

. A 50.00 mL sample of 0.200 M HNO3 was titrated with 0.200 M NaOH. Determine the pH of the solution at the following points during the titration: before addition of base at the halfway point

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Microbiology Cell Biology Molecular Biology

03/28/19

True or False. Genes in prokaryotes tend to be grouped together in operons, with several genes under the control of a single regulatory region.

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Chemistry

03/28/19

What pressure (in kPa) is exerted by 0.622 moles of gas contained in a 9.1mL vessel at 16°C

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Math Science Chemistry

03/28/19

How much heat is involved in changing 88.2 g S from 111 degrees celsius to 119 degrees celsius?

10th grade heat/joules/chem problem. endothermic chemistry problem

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Chemistry

03/28/19

I do not understand my chemistry homework

We had to create a mixture that has 97% zinc and 3% copper. We also had to demonstrate how to isolate the copper using HCl. We also need to show, using calculations and balanced reactions why HCl... more

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Chemistry

03/28/19

Consider the reaction

Consider the reactionB2H6(g) + 3 O2(g) → B2O3(s) + 3 H2O(g) ∆H = -2035 kJ/molCalculate the amount of heat released when 18.8 g of diborane is burned.heat released = kJ

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Answers •1

Chemistry

03/28/19

Thermal Equilibrium I

A 32.2 g sample of copper at 99.8 °C is carefully placed into an insulated container containing 215 g of water at 18.5 °C. Assume there is no energy transferred to or from the container.Specific... more

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Pharmacology Neuroscience Pharmacokinetics

03/27/19

How to make GABA pass the blood brain barrier?

I thought of methylating GABA at the gamma amino group in order to make it pass the blood brain barrier, but would it work?The goal is to make a sedative. Like GHB or benzodiazepines (I know that... more

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Chemistry

03/26/19

% of chlorine in CuCI2

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Answers •1

Pharmacology Neuroscience Toxicology

03/26/19

Why is Botulinum toxin the most potent poison known?

Botulinum toxin (trade name Botox) inhibits acetylcholine release in neurons and causes botulism, an acute paralytic disease which leads to nerve degeneration and takes a long time to recover. I've... more

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Biology Chemistry

03/26/19

What substances are microfilaments made of? What properties of these elements give motility to cells?

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Answers •1

Chemistry

03/25/19

One last reaction question?

2 O2−(aq) → O2(g) The reaction above is an example of: Question 1 options: a. oxidation b. reduction This one I believe it to be a oxidation as the 2O lost the 2-? Please correct me if I'm... more

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Chemistry

03/25/19

determine the expected freezing point of a cacl2 solution prepared at room temperature from 2.55 kg of calcium chloride and 33.8 Liters

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Chemistry

03/25/19

Calculate the mole fraction of HCl in a 10.0% (by mass) aqueous solution.

Calculate the mole fraction of HCl in a 10.0% (by mass) aqueous solution.Answer is 0.0520, why?

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Biochemistry

03/25/19

How fast will cells lyse under hypotonic conditions?

Routinely, lysis of cells with hypotonic solutions is carried out along with some physical (douncing) or enzymatic (lysozyme) method to break open the cells. If one were not to do any of these and... more

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Math Chemistry Algebra

03/24/19

What is the strength (expressed as a percent) of a 600 milliliter solution that contains 120 grams of dextrose?

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Answers •1

Chemistry

03/24/19

Thermite Reactants

Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid fuel rocket motors. The reaction isFe2O3(s) + 2Al(s) → 2Fe(l) +... more

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Answers •1

Chemistry

03/24/19

Thermite Reaction

Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid fuel rocket motors. The reaction isFe2O3(s) + 2Al(s) → 2Fe(l) +... more

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Answers •1

Chemistry

03/24/19

thermite reaction

Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid fuel rocket motors. The reaction isFe2O3(s) + 2Al(s) → 2Fe(l) +... more

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Answers •1

Chemistry

03/24/19

Experiment - Calorimetry

If the student thought that his unknown metal was either Bismuth or Lead, what other physical property could he use to confirm the identity of the unknown?

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Calculate ∆H for the reaction (j)

Consider the reaction (n)

Student A weight 0.747 g of KHP on a laboratory balance.

Vinegar is an aqueous solution of acetic acid.

the temperature of a 62 g sample of material invreases from 21 C to 41 C when it absorbs 3000 J of energy as heat.

. A 50.00 mL sample of 0.200 M HNO3 was titrated with 0.200 M NaOH. Determine the pH of the solution at the following points during the titration:

True or False. Genes in prokaryotes tend to be grouped together in operons, with several genes under the control of a single regulatory region.

What pressure (in kPa) is exerted by 0.622 moles of gas contained in a 9.1mL vessel at 16°C

How much heat is involved in changing 88.2 g S from 111 degrees celsius to 119 degrees celsius?

I do not understand my chemistry homework

Consider the reaction

Thermal Equilibrium I

How to make GABA pass the blood brain barrier?

% of chlorine in CuCI2

Why is Botulinum toxin the most potent poison known?

What substances are microfilaments made of? What properties of these elements give motility to cells?

One last reaction question?

determine the expected freezing point of a cacl2 solution prepared at room temperature from 2.55 kg of calcium chloride and 33.8 Liters

Calculate the mole fraction of HCl in a 10.0% (by mass) aqueous solution.

How fast will cells lyse under hypotonic conditions?

What is the strength (expressed as a percent) of a 600 milliliter solution that contains 120 grams of dextrose?

Thermite Reactants

Thermite Reaction

thermite reaction

Experiment - Calorimetry

Still looking for help? Get the right answer, fast.

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J.R. S.

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Emmersion

Calculate ∆H for the reaction (j)

Consider the reaction (n)

Student A weight 0.747 g of KHP on a laboratory balance.

Vinegar is an aqueous solution of acetic acid.

the temperature of a 62 g sample of material invreases from 21 C to 41 C when it absorbs 3000 J of energy as heat.

. A 50.00 mL sample of 0.200 M HNO3 was titrated with 0.200 M NaOH. Determine the pH of the solution at the following points during the titration:

True or False. Genes in prokaryotes tend to be grouped together in operons, with several genes under the control of a single regulatory region.

What pressure (in kPa) is exerted by 0.622 moles of gas contained in a 9.1mL vessel at 16°C

How much heat is involved in changing 88.2 g S from 111 degrees celsius to 119 degrees celsius?

I do not understand my chemistry homework

Consider the reaction

Thermal Equilibrium I

How to make GABA pass the blood brain barrier?

% of chlorine in CuCI2

Why is Botulinum toxin the most potent poison known?

What substances are microfilaments made of? What properties of these elements give motility to cells?

One last reaction question?

determine the expected freezing point of a cacl2 solution prepared at room temperature from 2.55 kg of calcium chloride and 33.8 Liters

Calculate the mole fraction of HCl in a 10.0% (by mass) aqueous solution.

How fast will cells lyse under hypotonic conditions?

What is the strength​ (expressed as a​ percent) of a 600 milliliter solution that contains 120 grams of​ dextrose?

Thermite Reactants

Thermite Reaction

thermite reaction

Experiment - Calorimetry

Still looking for help? Get the right answer, fast.

OR

J.R. S.

What is the strength (expressed as a percent) of a 600 milliliter solution that contains 120 grams of dextrose?