J.R. S.

11/25/18

How many grams of CaCN2 are required in order to produce 4.97 grams of ammonia (NH3)? Balanced Equation: 1CaCN2 (s) + 3 H2O (l) ---------> 1CaCO3 (s) + 2NH3 (g)

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Acid

11/25/18

is curdling a chain reaction?

or, like in general reactant-product reactions, will the reactants get used up if there arent enough, and the curdling stop? like, if the milk is just introduced to a tiny but adequate amount of... more

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Algebra

11/25/18

The spacecraft will travel __ miles per year. (Use scientific notation.)

Suppose a spacecraft recently started on a journey inside the solar system. The trip is 2.5 x 10^9 miles long and will take 7 1/2 years. How many miles will the spacecraft travel per year?

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Algebra

11/25/18

Rounding to three significant digits, the debt per person in the country would be about $ __ . (use scientific notation)

The national debt of a certain country is$1.73 x 10^12.The population of that country is about 3.93 x 10^7 people. If the national debt were evenly divided among every person in the country, how... more

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Chemistry

11/25/18

C6H12O6+6O2=6CO2+6H2O

How many grams of sucrose required to produce 345.7mL of a 4.36M H2O

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Chemistry Biochemistry Organic Chemistry

11/25/18

I've a problem with ranking compounds

thank you for taking some time for this, these two questions i dont get:arrange the following bonds in order of polarity, from the least polar to the most polar: H-H, O-H, Cl-H, S-H, and F-HRank... more

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Physics Measurements

11/24/18

Solve the sum using density formula

A plastic bag filled with air has a volume of 0.008m³. when air in the bag is squeezed into a rigid container, the mass of the container (with air) increases from 0.02kg to 0.03kg. use the density... more

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Chemistry Equilibrium Catalyst

11/24/18

Are the following aspects of a catalyzed reaction different from the uncatalyzed reaction?

Are these aspects different in a catalyzed reaction?1. The mechanism2. ΔE rxn3. The overall equation

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Answers •1

Chemistry

11/24/18

What is the final concentration of a solution if 15-mL of a 2.4-M solution was diluted to 100-mL and this process was repeated two more times?

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Answers •1

Chemistry

11/24/18

Ethylene glycol [CH2(OH)CH2(OH)] is a common automobile antifreeze. It is water soluble and fairly nonvolatile (b.p. 197°C).

. Ethylene glycol [CH2(OH)CH2(OH)] is a common automobile antifreeze. It is water soluble and fairly nonvolatile (b.p. 197°C). Calculate (a) the freezing point and (b) the boiling point of a... more

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Answers •2

Chemistry

11/24/18

Choose the options below that are true of standard reduction potential. (select all that apply)

Choose the options below that are true of standard reduction potential. (select all that apply)All standard reduction potentials are measured against that of the reduction of hydrogen ions... more

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Chemistry

11/23/18

Equilibrium constant equation

We have 0.01mol/l FeCl3 and 0.01mol/l NH4SCN, what is the equilibrium constant for this reaction?

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Chemistry

11/23/18

What volume (in L) of a 2.10 M NaOH solution is required to neutralize 0.30 mol of HCl?

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Chemistry Biochemistry Organic Chemistry

11/22/18

What changed rate of reaction?

. Which of the following changes is likely to DECREASE the rate of a reaction?A. increasing the activation energyB. increasing the concentration of reactants C. increasing the temperatureD.... more

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Chemistry Organic Chemistry

11/22/18

In the following reaction, what is being oxidized, and what is being reduced?

In the following reaction, what is being oxidized, and what is being reduced? Cl2 (g) + 2NaBr (aq) → 2NaCl (aq) + Br2 (g)A. Cl– in NaCl is oxidized; Br– in NaBr is reduced. B. Cl2 is... more

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Answers •1

Chemistry Biochemistry Organic Chemistry

11/22/18

Equilibrium constant

Consider the reactions 5a and 5b, below, taking place at 25 °C, and answer the following questions.5a H2S O3( g) ⟶ SO2( g) + H2O(g) △Go = +10 kJ mol- 15b H2( g) + Cl2( g) ⟶ 2 HCl(g)... more

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Chemistry Biochemistry Organic Chemistry

11/22/18

What is the molecular structure of these and why?

XeCl2 , ICl3 , TeF4 , PCl5what is the molecular structure of these and why?

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Chemistry Biochemistry

11/22/18

pH value from pka

Calculate the pH for a solution of 0.15 M CH3C OOH, given that the pKa for the acid is 4.75.

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Answers •1

Chemistry Biochemistry Organic Chemistry

11/22/18

Enthalpy question

The heats of formation of CH4( g), H2O (g) and CO(g) are -890.4 kJ mol- 1, -241.8 kJ mol- 1 and -110.5 kJ mol- 1 respectively. Determine the enthalpy change for the reaction and state... more

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Chemistry Biochemistry Organic Chemistry

11/22/18

Equilibrium.... shift of equilibrium

Oxygen can be converted to ozone (O3) in the following reaction:3 O2( g) + heat ⇌ 2 O3(g)All of the following changes at equilibrium will shift the reaction to products except:A. adding O2... more

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Chemistry Biochemistry Enthalpy

11/22/18

Enthalpy change

In gluconeogenesis, glucose can be produced by reaction of pyruvic acid and glycerol. Upon consideration of the simplified version of this reaction, as shown below, and making use of the data in... more

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Chemistry

11/22/18

Toluene is an additive in many gasoline. The ΔH vap of toluene = 37 KJ/mol and its normal boiling point is 111 degrees C. What is the vapour pressure of toluene (in kPa) at 30 degrees Celsius?

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Answers •1

Chemistry

11/22/18

Balance the following redox reaction in acidic solution:

Balance the following redox reaction in acidic solution:I−(aq)+OCl−(aq)⟶Cl−(aq)+I2(aq)

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Chemistry

11/22/18

If Ksp=2.1×10−33, what is the molar solubility of Ca3(PO4)2? Report your answer with the correct number of significant figures.

If Ksp=2.1×10−33, what is the molar solubility of Ca3(PO4)2? Report your answer with the correct number of significant figures. Ca3(PO4)2(s)↽−−⇀3Ca2+(aq)+2PO3−4(aq)

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Chemistry

11/21/18

Calculate the energy change (in kJ) for the combustion of 3.02 grams of ethane using 12.95 grams of oxygen.

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Answers •1

How many grams of CaCN2 are required in order to produce 4.97 grams of ammonia (NH3)? Balanced Equation: 1CaCN2 (s) + 3 H2O (l) ---------> 1CaCO3 (s) + 2NH3 (g)

is curdling a chain reaction?

The spacecraft will travel __ miles per year. (Use scientific notation.)

Rounding to three significant digits, the debt per person in the country would be about $ __ . (use scientific notation)

C6H12O6+6O2=6CO2+6H2O

I've a problem with ranking compounds

Solve the sum using density formula

Are the following aspects of a catalyzed reaction different from the uncatalyzed reaction?

What is the final concentration of a solution if 15-mL of a 2.4-M solution was diluted to 100-mL and this process was repeated two more times?

Ethylene glycol [CH2(OH)CH2(OH)] is a common automobile antifreeze. It is water soluble and fairly nonvolatile (b.p. 197°C).

Choose the options below that are true of standard reduction potential. (select all that apply)

Equilibrium constant equation

What volume (in L) of a 2.10 M NaOH solution is required to neutralize 0.30 mol of HCl?

What changed rate of reaction?

In the following reaction, what is being oxidized, and what is being reduced?

Equilibrium constant

What is the molecular structure of these and why?

pH value from pka

Enthalpy question

Equilibrium.... shift of equilibrium

Enthalpy change

Toluene is an additive in many gasoline. The ΔH vap of toluene = 37 KJ/mol and its normal boiling point is 111 degrees C. What is the vapour pressure of toluene (in kPa) at 30 degrees Celsius?

Balance the following redox reaction in acidic solution:

If Ksp=2.1×10−33, what is the molar solubility of Ca3(PO4)2? Report your answer with the correct number of significant figures.

Calculate the energy change (in kJ) for the combustion of 3.02 grams of ethane using 12.95 grams of oxygen.

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J.R. S.

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Emmersion

How many grams of CaCN2 are required in order to produce 4.97 grams of ammonia (NH3)? Balanced Equation: 1CaCN2 (s) + 3 H2O (l) ---------> 1CaCO3 (s) + 2NH3 (g)

is curdling a chain reaction?

The spacecraft will travel __ miles per year. ​(Use scientific notation.)

Rounding to three significant​ digits, the debt per person in the country would be about $ __ . (use scientific notation)

C6H12O6+6O2=6CO2+6H2O

I've a problem with ranking compounds

Solve the sum using density formula

Are the following aspects of a catalyzed reaction different from the uncatalyzed reaction?

What is the final concentration of a solution if 15-mL of a 2.4-M solution was diluted to 100-mL and this process was repeated two more times?

Ethylene glycol [CH2(OH)CH2(OH)] is a common automobile antifreeze. It is water soluble and fairly nonvolatile (b.p. 197°C).

Choose the options below that are true of standard reduction potential. (select all that apply)

Equilibrium constant equation

What volume (in L) of a 2.10 M NaOH solution is required to neutralize 0.30 mol of HCl?

What changed rate of reaction?

In the following reaction, what is being oxidized, and what is being reduced?

Equilibrium constant

What is the molecular structure of these and why?

pH value from pka

Enthalpy question

Equilibrium.... shift of equilibrium

Enthalpy change

Toluene is an additive in many gasoline. The ΔH vap of toluene = 37 KJ/mol and its normal boiling point is 111 degrees C. What is the vapour pressure of toluene (in kPa) at 30 degrees Celsius?

Balance the following redox reaction in acidic solution:

If Ksp=2.1×10−33, what is the molar solubility of Ca3(PO4)2? Report your answer with the correct number of significant figures.

Calculate the energy change (in kJ) for the combustion of 3.02 grams of ethane using 12.95 grams of oxygen.

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

OR

J.R. S.

The spacecraft will travel __ miles per year. (Use scientific notation.)

Rounding to three significant digits, the debt per person in the country would be about $ __ . (use scientific notation)