J.R. S.

02/16/19

Consider the reaction 2HI(g)→H2(g)+I2(g). At 585 K, the rate constant is 9.64×10−5Lmol s. At 690. K, the rate constant is 2.83×10−3Lmol s.

Consider the reaction 2HI(g)→H2(g)+I2(g). At 585 K, the rate constant is 9.64×10−5Lmol s. At 690. K, the rate constant is 2.83×10−3Lmol s. Use the Arrhenius equation to calculate the activation... more

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Chemistry Chem

02/16/19

What mass of a hot (85.0°C) aluminum rod (s = 0.900 J/°C•g) would need to be placed in 200. mL of water

What mass of a hot (85.0°C) aluminum rod (s = 0.900 J/°C•g) would need to be placed in 200. mL of water (density = 1.00 g/mL, s = 4.184 J/°C•g) in order to increase the temperature of the water... more

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Chemistry

02/16/19

What is the equilibrium constant for the reversible reaction in aqueous medium below given that the respective concentrations of A, B, C, and D are 0.0117 M, 0.00440 M, 0.00550 M, and 0.00780 M

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Chemistry Chem

02/15/19

Chloroform, CHCl3, is formed by the following reaction: CH4(g) + 3 Cl2(g) → 3 HCl(g) + CHCl3 (g) Determine the enthalpy change for this reaction (ΔH°rxn)

Chloroform, CHCl3, is formed by the following reaction: CH4(g) + 3 Cl2(g) → 3 HCl(g) + CHCl3 (g) Determine the enthalpy change for this reaction (ΔH°rxn), using the enthalpy of formation of CHCl3... more

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Chemistry Chem

02/15/19

Determine the enthalpy change for the reaction 2C(s) + 2H2O(g) → CH4(g) + CO2(g) using the following:

Determine the enthalpy change for the reaction 2C(s) + 2H2O(g) → CH4(g) + CO2(g) using the following: C(s) + H2O(g) → CO(g) + H2(g) ΔH° = 131.3 kJ CO(g) + H2O(g) → CO2(g) + H2(g) ΔH° = 41.2 kJ ... more

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Algebra 1

02/15/19

due to your severe pain the doctor tells the nurse to give you 825 mg of pain medicine every 6 hours

due to your severe pain the doctor tells the nurse to give you 825 mg of pain medicine every 6 hours. You also hear the nurse say that the medication comes in 250mg tablets. How many tablets should... more

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Chemistry Chem

02/15/19

The standard molar enthalpy of formation for gaseous H2O is −241.8 kJ/mol. What is the standard molar enthalpy of formation for liquid hydrazine (N2H4)?

The standard molar enthalpy of formation for gaseous H2O is −241.8 kJ/mol. What is the standard molar enthalpy of formation for liquid hydrazine (N2H4)? N2H4(l) + O2(g) → N2(g) +... more

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Science Physical Science

02/15/19

2 Kelly is sledding on a snowy hill in the winter. The energy the sled has as it slides down the hill is a form of

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Chemistry Rockite

02/15/19

Hey Can rockite with stand hot temps like in a forge

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Chemistry

02/15/19

How many grams of NH3 can be produced from 11.2 g of H2?

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Chemistry

02/15/19

Chemistry Help!!!!!

5.00 ml of 5.05×10-5 M CV+ is mixed with 4.00 ml of 0.0200 M NaOH and 1.00 mL of DI water. The absorbance of the solution was 0.645 at 20.00 seconds and 0.437 at 40.00 seconds.What is the... more

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Chemistry

02/15/19

Which of the following elementary reactions are bimolecular reactions? (select all that apply)

2HI→H2+I2NO2+CO→NO+CO2N2O4→2NO2C4H8→2C2H4

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Chemistry

02/14/19

Chemistry help needed by 5:30!!!

The melting point of substance X is 145°C and the boiling point of X is 545°C. The specific heat of x As a solid is 1.24 J per gram degrees Celsius, 0.960 J per gram Celsius as a liquid, and 0.565... more

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Chemistry

02/14/19

What is the activation energy Ea for a reaction that has a rate constant of 0.245s−1 at a temperature of 273K and a rate constant of 0.518s−1 at a temperature of 315K ?

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Chemistry Theoretical Stoichiometry

02/14/19

what is the mass of carbon dioxide if 5.00 grams of propane are consumed in the following reaction

c3h8+5o2=3co2+4h2o please help please help

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Math Elementary Math

02/14/19

Do 15 slices of bread weigh more than 1 pound?

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Biology Prealgebra

02/14/19

Rachel prepared 6 kilograms of dough after working 2 hours. How much dough did Rachel prepare if she worked for 3 hours? Solve using unit rates.

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English

02/14/19

I am eating rice.

Underline the nouns in this sentence.

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Science Chemistry Organic Chemistry

02/14/19

Chemistry kinetics question?

A sample was prepared by mixing 18.0mL of 5.00 X 10^-3 M Crystal Violet (CV) with 2.00mL of 0.333 M NaOH. What are the resulting concentrations of CV and OH-?

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Chemistry

02/14/19

A certain reaction has an activation energy of 40.02 kJ/mol. At what Kelvin temperature will the reaction proceed 6.50 times faster than it did at 331 K?

I've tried this question so many times and keep getting 347 K but the website says that's the wrong answer. Can someone help me please?

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Chemistry

02/14/19

Calculate the molality of a solution if 225g of C6H6 is dissolved in 1.63 kg of a solvent.

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Chemistry Equilibrium

02/13/19

Chemistry Reaction Equilibrium help??

0.7 mol of A(g), 0.5 mil of B(g), 0.4 mol of C(g) and 0.9 mol of D(g) were placed in a one litre vessel and allowed to come to equilibrium according to the following equation : A(g) + B(g) ⇔ C(g) +... more

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Chemistry

02/13/19

If 10g of a product should be produced in a chemical reaction and only 8g are produced. What is the percent yield?

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Organic Chemistry

02/13/19

Need help! I have to calculate the volume but what does the w/w and the percents mean?

Adipoyl Chloride 5% (w/w) in cyclohexane (It says to use 15 mL of this stuff & density is 1.2500, & formula weight is 183.03) Cyclohexane from the above solution (formula weight is 84.16... more

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Physical Science

02/13/19

which atoms have the lowest electronegativity

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Consider the reaction 2HI(g)→H2(g)+I2(g). At 585 K, the rate constant is 9.64×10−5Lmol s. At 690. K, the rate constant is 2.83×10−3Lmol s.

What mass of a hot (85.0°C) aluminum rod (s = 0.900 J/°C•g) would need to be placed in 200. mL of water

What is the equilibrium constant for the reversible reaction in aqueous medium below given that the respective concentrations of A, B, C, and D are 0.0117 M, 0.00440 M, 0.00550 M, and 0.00780 M

Chloroform, CHCl3, is formed by the following reaction: CH4(g) + 3 Cl2(g) → 3 HCl(g) + CHCl3 (g) Determine the enthalpy change for this reaction (ΔH°rxn)

Determine the enthalpy change for the reaction 2C(s) + 2H2O(g) → CH4(g) + CO2(g) using the following:

due to your severe pain the doctor tells the nurse to give you 825 mg of pain medicine every 6 hours

The standard molar enthalpy of formation for gaseous H2O is −241.8 kJ/mol. What is the standard molar enthalpy of formation for liquid hydrazine (N2H4)?

2 Kelly is sledding on a snowy hill in the winter. The energy the sled has as it slides down the hill is a form of

Hey Can rockite with stand hot temps like in a forge

How many grams of NH3 can be produced from 11.2 g of H2?

Chemistry Help!!!!!

Which of the following elementary reactions are bimolecular reactions? (select all that apply)

Chemistry help needed by 5:30!!!

What is the activation energy Ea for a reaction that has a rate constant of 0.245s−1 at a temperature of 273K and a rate constant of 0.518s−1 at a temperature of 315K ?

what is the mass of carbon dioxide if 5.00 grams of propane are consumed in the following reaction

Do 15 slices of bread weigh more than 1 pound?

Rachel prepared 6 kilograms of dough after working 2 hours. How much dough did Rachel prepare if she worked for 3 hours? Solve using unit rates.

I am eating rice.

Chemistry kinetics question?

A certain reaction has an activation energy of 40.02 kJ/mol. At what Kelvin temperature will the reaction proceed 6.50 times faster than it did at 331 K?

Calculate the molality of a solution if 225g of C6H6 is dissolved in 1.63 kg of a solvent.

Chemistry Reaction Equilibrium help??

If 10g of a product should be produced in a chemical reaction and only 8g are produced. What is the percent yield?

Need help! I have to calculate the volume but what does the w/w and the percents mean?

which atoms have the lowest electronegativity

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