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03/20/22

Enthalpy of Reaction

Please do include a solution. Thank you!1. 3𝐻2(𝑔) + 𝑂3(𝑔) → 3𝐻2𝑂(𝑙)2. 𝑁2𝑂(𝑔) + 𝑁𝑂2(𝑔) → 3N𝑂(𝑔)3. 𝐶𝑎𝐶2(𝑠) + 2𝐻2𝑂(𝑙) → 𝐶𝑎(𝑂𝐻)2(𝑠) + 𝐶2𝐻2(𝑔)

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Science Chemistry Biochemistry

03/20/22

First Law of Thermodynamics (Chemistry)

Please include a step-by-step solution. Thank you. Calculate the change in the internal energy of a system if 50 kJ of heat is added to it and if the system performs 20 000 J of work. Determine the... more

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Science Chemistry Biochemistry

03/20/22

Stoichiometric Solutions

What is the step-by-step procedure solution and answers to these one? How many moles CO2 of is produced by the complete combustion of 58 g of butane (C4H10)?2C4H10 + 13O2 → 8CO2 +10H2O2. If 5.0... more

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Science Chemistry Biochemistry General Chemistry

03/20/22

Chemistry Problem Help

What is the step by step procedure of finding molar mass on these following? Glucose - C6H1206 Calcium Hydroxide - Ca(OH)2

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Science Chemistry Stoichiometry

03/20/22

5.05 g of solid Mg(OH)2 is added to 34.2 mL of 0.498 M H2SO4 solution. What will the concentration of Mg2+ be when all of acid has been neutralized? How many grams of Mg(OH)2 will not have dissolved?

Very confused on this please help.

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Science Chemistry

03/20/22

Suppose that 5.82 g of solid Fe2O3 is added to 24.3 mL of 0.577 M HCl solution. What is the concentration of the Fe3+ that needed to react with all the HCl? What mass of Fe2O3 will not have reacted?

Please help im having trouble getting it right.

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Science Chemistry

03/20/22

How many milliliters of 0.318 M Ba(OH)2 solution are needed to completely neutralize 39.0 mL of 0.181 M HCl solution? The reaction is Ba(OH)2(aq) + 2HCl(aq) → BaCl2(aq) + 2H2O(l)

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Science Chemistry Concentration Titration

03/19/22

What is the concentration of the NaOH solution?

Suppose you are standardizing a sodium hydroxide solution with KHP (molar mass=204.2 g/mol) according to the equation:KHP+NaOH⟶H2O+NaKPYou prepare the standard solution from 0.299 g of KHP in 250.0... more

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Science Chemistry Titration

03/17/22

What is the percentage of KHP in the mixture?

Suppose you are titrating a solid mixture containing KHP (molar mass=204.2 g/mol) and a salt compound. KHP reacts with NaOH according to the equation:KHP+NaOH ⟶ H2O + NaKP*You prepare the analyte... more

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Science Chemistry Titration

03/17/22

What is the concentration?

Suppose you are titrating a sulfuric acid solution of unknown concentration with a sodium hydroxide solution according to the equation:H2SO4+2NaOH⟶2H2O+Na2SO4*If you require 25.46 mL of 0.959 M... more

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Science Chemistry

03/17/22

What is the molarity (in mol/L) of the NaOH solution?

A beaker containing 0.400 g KHPwas titrated with NaOH solution. The pale pink end point was reached after 19.24 mL of NaOH solution was dispensed. What is the molarity (in mol/L) of the NaOH solution? more

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Science Biology Taxonomy General Biology

03/16/22

How can we can help in the protection of the unknown species in the world?

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Science Biology Ecology

03/15/22

Animal Sexuality Behavior

1.what are the costs of sexual selection?a)mating displays may attract predatorsb)genetic variationc)speciationd)none of the above

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Science Biology Earth Science Disaster

03/15/22

What are some of the hazards present in a living room, kitchen/dining room, bathroom, bedroom? Ex.Chandeliers and big Cieling lights

What are some of the hazards present in a living room, kitchen/dining room, bedroom? Ex. Chandeliers and big Ceiling lights

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Science Chemistry

03/15/22

What is the pH of the solution?

You have 1.00 liter of a buffer solution where the concentration of lactic acid (HC3H5O3) is 0.200 M and the concentration of sodium lactate (NaC3H5O3) is 0.160 M. The pKa for lactic acid is 3.85.... more

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Science Biology Ecology

03/14/22

Animal Sexuality Behavior

1.what are the costs of sexual selection?a)mating displays may attract predatorsb)genetic variationc)speciationd)none of the above2.Behaviors originate from normal movement patterns, over time... more

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Science Biology

03/14/22

Read the following question. What is the independent variable? What is the dependent variable?

Will a plant grow better in soil or water.

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Science Biology Hazards Disaster Risk Management

03/10/22

What are some of the hazards present in a living room, kitchen/dining room, bathroom, bedroom?

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Science Geology Disaster Risk Management

03/10/22

What particular volcanic hazard is assessed for hazard zoning based on the height of the eruption column, and strength and direction of the wind?

1.What particular volcanic hazard is assessed for hazard zoning based on the height of the eruption column, and strength and direction of the wind?A.laharB.pyroclastic flowC.lava flowD.pyroclastic... more

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Science Chemistry Biochemistry Organic Chemistry

03/09/22

How many grams of nitric acid are there in 3 mol nitric acid?

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Science Chemistry Biochemistry Organic Chemistry

03/09/22

Solve for the molarity of 0.327 grams sulfuric acid in a 250 ml solution.

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Science Chemistry Biochemistry Organic Chemistry

03/09/22

A silver chloride sample was allowed to dissociate in 15 ml of water.

What is the chloride ion concentration if the sample weighs 0.5479 g?

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Science Chemistry Biochemistry Organic Chemistry

03/09/22

BOILING POINT OF A SOLUTION

How many moles of ions are formed in aqueous solution when 1 mol of Sr(OH)2 dissolves in water? Explain its effect in the freezing and boiling point of a solution

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Science Chemistry Biochemistry Organic Chemistry

03/09/22

COLLIGATIVE PROPERTY CHEMISTRY

Which compound will have the lowest impact in the colligative property? Why?A. 3 mol CaCl2B. 3 mol C6H12O6C. 3 mol NaClD. Both A and B

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Science Math Algebra 1 Algebra 2

03/08/22

Pam has 2 more than ⅓ as many baseball cards as Fred. Pam has 96 cards. How many cards does Fred have?

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Enthalpy of Reaction

First Law of Thermodynamics (Chemistry)

Stoichiometric Solutions

Chemistry Problem Help

5.05 g of solid Mg(OH)2 is added to 34.2 mL of 0.498 M H2SO4 solution. What will the concentration of Mg2+ be when all of acid has been neutralized? How many grams of Mg(OH)2 will not have dissolved?

Suppose that 5.82 g of solid Fe2O3 is added to 24.3 mL of 0.577 M HCl solution. What is the concentration of the Fe3+ that needed to react with all the HCl? What mass of Fe2O3 will not have reacted?

How many milliliters of 0.318 M Ba(OH)2 solution are needed to completely neutralize 39.0 mL of 0.181 M HCl solution? The reaction is Ba(OH)2(aq) + 2HCl(aq) → BaCl2(aq) + 2H2O(l)

What is the concentration of the NaOH solution?

What is the percentage of KHP in the mixture?

What is the concentration?

What is the molarity (in mol/L) of the NaOH solution?

How can we can help in the protection of the unknown species in the world?

Animal Sexuality Behavior

What are some of the hazards present in a living room, kitchen/dining room, bathroom, bedroom? Ex.Chandeliers and big Cieling lights

What is the pH of the solution?

Animal Sexuality Behavior

Read the following question. What is the independent variable? What is the dependent variable?

What are some of the hazards present in a living room, kitchen/dining room, bathroom, bedroom?

What particular volcanic hazard is assessed for hazard zoning based on the height of the eruption column, and strength and direction of the wind?

How many grams of nitric acid are there in 3 mol nitric acid?

Solve for the molarity of 0.327 grams sulfuric acid in a 250 ml solution.

A silver chloride sample was allowed to dissociate in 15 ml of water.

BOILING POINT OF A SOLUTION

COLLIGATIVE PROPERTY CHEMISTRY

Pam has 2 more than ⅓ as many baseball cards as Fred. Pam has 96 cards. How many cards does Fred have?

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