Ellen E.

07/01/19

Nitrogen gas at a pressure of 2.5 atm and a temperature of 25* C, what temperature is required to increase the pressure to 4 atm, when the volume is fixed and gas level does not change?

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Organic Chemistry Synthesis Stereochemistry

06/26/19

Is it possible, chemically, to change a dextrorotatory compound to its levorotatory counterpart?

Is it possible, chemically, to change a dextrorotatory compound to its levorotatory counterpart? E.g., is it possible to change dextrodopa to levodopa?

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Chemistry

05/28/19

For the reaction of potassium hydrogen sulfate and sodium acetate, are the products or reactants favored?

For the reaction of potassium hydrogen sulfate and sodium acetate, are the products or reactants favored?Question 3 options: a. Products b. Reactants

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Answers •1

Chemistry Stoichiometry Acid Base Reaction

05/28/19

Ca(OH)2+H2SO4=>CaSO4+H2O. 100g of sulfuric acid is reacted with 78g of calcium hydroxide. Limiting reactant, theoretical yield+% yield of H2O produced by the reactant if actual yield is 34g of H2O?

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Answers •1

Chemistry Gas Stochiometry

05/28/19

Cs+H2O=>CsOH+H2. A 0.5 kilogram block of cesium is dropped into the ocean. How much gas is released into the atmosphere if the air temp is 12 C?

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Answers •1

Chemistry Ap Chemistry

05/27/19

Equilibrium constant value

A galvanic cell is based on the following half- reactions:Cu+2 (aq) + 2e- à Cu (s) ɛ° = 0.34 VV+2 (aq) + 2e- à V (s) ɛ° = -1.20 VIn this cell, the copper... more

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Answers •1

Chemistry Ap Chemistry

05/26/19

Concentration of H+

HA is a weak, monoprotic acid that dissociated according to the equation:HA (aq) ßà H+ (aq) + A- (aq) Ka = 4.0 x 10-9If the initial concentration of HA is 0.10 M, find the... more

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Answers •2

Chemistry Ap Chemistry

05/26/19

Molarity of the copper (I) hydroxide

A student uses acetic acid to titrate a solution of copper(I) hydroxide to determine the concentration of the copper (I) hydroxide. If 30.0 mL of 0.250 M acetic acid is needed to neutralize 15.0 mL... more

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Chemistry Ap Chemistry

05/26/19

Galvanic cell based on half-reactions

A galvanic cell is based on the following half- reactions:Cu+2 (aq) + 2e- à Cu (s) ɛ° = 0.34 VV+2 (aq) + 2e- à V (s) ɛ° = -1.20 VIn this cell, the copper compartment... more

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Answers •1

Chemistry

05/26/19

Calorimeterquestion

a 25.0 g sample of zinc is heated, then placed in a calorimeter containing 65.0 g of water. Temperature of water increases from 20.00 C to 22.50 C. The initial temp. of the zinc was 92.23 C. What... more

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Answers •1

Chemistry

05/20/19

To form 33.6 liters of NH3 gas at STP , how many grams of N2O5 are needed

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Answers •1

Chemistry

05/19/19

How much Magnesium chloride would you need to put in 555 g of water to raise the boiling point by 11 o C

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Answers •2

Chemistry

05/17/19

What’s the pH of the solution after 50 mL 0.10 M HCl is added to 20 ML 0.1 M Na3PO4 solution? (pKa1=2.16, pKa2=7.21, and pKa3=12.32 for H3PO4).

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Answers •1

Algebra 1

05/16/19

An apple orchard contains 85 trees. The number of trees in each row is three less than four times the number of rows. Find the number of rows and the number of trees per row.

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Algebra 1

05/16/19

In an office building, a room contains 54 chairs. The number of chairs per row is three less than twice the number of rows. Find the number of rows and the number of chairs per row.

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Answers •1

Chemistry

05/14/19

calculating the equilibrium concentrations

A mixture of 0.460 M H2O, 0.393 M Cl2O, and 0.683 M HClO are enclosed in a vessel at 25 °C.Calculate the equilibrium concentrations of each gas at 25 °C.H2O (g) +Cl2O(g) --><--2HOCl(g)for H2O... more

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Chemistry

05/14/19

Standard Reduction Potential

Use the Standard Reduction Potential table and assume standard conditions.a.) Is H+(aq) capable of oxidizing Cu (s) to Cu+2 (aq)?b.) Is H2 (g) capable of reducing Ag+ (aq)

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Chemistry Mole Concept

05/13/19

if 5.13g of aq solution of sugar c12h22o11 is present in 250 ml of h2o then calculate molality of the solution

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Answers •1

Math

12/10/14

How many pebbles did Marc collect?

Abby collected 3 times as many pebbles as James. Marc collected 21 fewer pebbles than Abby. Altogether they collected 294 pebbles. How many pebbles did Mark collect?

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Answers •2

Identified Linear Equations

12/10/14

if the equation of a line has a slope of 0 and passes through the point 3, 3 which form would be used to write the equation of the line"

Is it..... X-intercept form Y-intercept form Slope-intercept form Point-slope form

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Answers •1

Chemistry

12/07/14

Calculate delta H for the combustion of 1.00 g of C4H10

The heat of combustion of C4H10 is -688kcal/mol.

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Answers •1

Word Problem

12/07/14

Word problem need help ASAP

A convenience store employee is counting $10 and $20 bills. If there are four times as many $10 bills as $20 bills and the total is $1320, find the number of each type of bill

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Coordinate Algebra

12/07/14

Saul can pain a wall rate of 10 square inches per second. Convert this to square meters per minute

I need to work this out but I have no idea how to do it so can you please help

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Answers •2

Nitrogen gas at a pressure of 2.5 atm and a temperature of 25* C, what temperature is required to increase the pressure to 4 atm, when the volume is fixed and gas level does not change?

Is it possible, chemically, to change a dextrorotatory compound to its levorotatory counterpart?

For the reaction of potassium hydrogen sulfate and sodium acetate, are the products or reactants favored?

Ca(OH)2+H2SO4=>CaSO4+H2O. 100g of sulfuric acid is reacted with 78g of calcium hydroxide. Limiting reactant, theoretical yield+% yield of H2O produced by the reactant if actual yield is 34g of H2O?

Cs+H2O=>CsOH+H2. A 0.5 kilogram block of cesium is dropped into the ocean. How much gas is released into the atmosphere if the air temp is 12 C?

Equilibrium constant value

Concentration of H+

Molarity of the copper (I) hydroxide

Galvanic cell based on half-reactions

Calorimeterquestion

To form 33.6 liters of NH3 gas at STP , how many grams of N2O5 are needed

How much Magnesium chloride would you need to put in 555 g of water to raise the boiling point by 11 o C

What’s the pH of the solution after 50 mL 0.10 M HCl is added to 20 ML 0.1 M Na3PO4 solution? (pKa1=2.16, pKa2=7.21, and pKa3=12.32 for H3PO4).

An apple orchard contains 85 trees. The number of trees in each row is three less than four times the number of rows. Find the number of rows and the number of trees per row.

In an office building, a room contains 54 chairs. The number of chairs per row is three less than twice the number of rows. Find the number of rows and the number of chairs per row.

calculating the equilibrium concentrations

Standard Reduction Potential

if 5.13g of aq solution of sugar c12h22o11 is present in 250 ml of h2o then calculate molality of the solution

How many pebbles did Marc collect?

if the equation of a line has a slope of 0 and passes through the point 3, 3 which form would be used to write the equation of the line"

Calculate delta H for the combustion of 1.00 g of C4H10

Word problem need help ASAP

Saul can pain a wall rate of 10 square inches per second. Convert this to square meters per minute

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