315 Answered Questions for the topic General Chemistry

General Chemistry

09/21/16

If a reaction occurs in solution, name two ways you could slow down the reaction:
If a reaction occurs in solution, name two ways you could slow down the reaction:   A)   B)
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General Chemistry Chemistry Chemistry Lab

09/16/16

what state of matter would you expect fluorine to be at -200 degrees Celsius
what state of matter would you expect fluorine to be at -200 degrees Celsius?
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General Chemistry

09/13/16

Match the staments 1 to three with a to d.
They have the same shape The maximum number of electrons is the same. They are in the same energy level.        a. 5s and 6s orbitals   b. 3p and 4p orbitals     c. 3s and 4s sublevels  d.... more
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General Chemistry

08/19/16

For liquids which of the following affect vapor pressure? Intermolecular forces, humidity, temperature, volume, and/or surface area?
For liquids which of the following affect vapor pressure? List all of the ones that apply. Intermolecular forces, humidity, temperature, and/or surface area?
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General Chemistry Chemistry

08/02/16

Evaluating an Equilibrium Involving a Complex Ion. PLEASE HELP!!!
You have an aqueous solution of chromium(III) nitrate that you titrate with an aqueous solution of sodium hydroxide. After a certain amount of titrant has been added, you observe a precipitate... more
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General Chemistry Chemistry Ask Chemistry question

07/09/16

A one electron species, Xm, where m is the charge of the one electron species and X is the element symbol, loses its one electron from its ground state when it
absorbs 1.96E-17 J of energy. Using the prior information, the charge of the one electron species is ______.
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General Chemistry Ask Chemistry question

07/09/16

Combustion of a compound of CxHyOz yields 6.25g H2O and 20.4g CO2 when 16.7 g of O2 is used. What is the empirical formula of the compound?
 Please help me with this! Work would be very much appreciated. 
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General Chemistry Chemistry

06/28/16

Calculate the value of the rate constant. PLEASE HELP!
The rate law for the reaction NH2 (g) + NO (g) → N2 (g) + H2O (g) was determined to be as follows: Rate = k[NH2][NO]. In an experiment at 1200K, where the initial concentration of NH2 was 1.00 ×... more
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General Chemistry Chemistry

06/28/16

A second-order reaction has a rate law: Rate = k[A]^2, where k = 0.150 M^-1s^-1. What is the concentration of A after 5.00 minutes?
A second-order reaction has a rate law: Rate = k[A]^2, where k = 0.150 M^−1s^−1. If the initial concentration of A is 0.250 M, what is the concentration of A after 5.00 minutes? Be sure to pay... more
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General Chemistry Chemistry

06/28/16

Calculate the activation energy (Ea) in kJ/mol for a reaction. PLEASE HELP!
Calculate the activation energy (Ea) in kJ/mol for a reaction if the rate constant (k) is 2.7 × 10^-4 (M^−1sec^−1) at 600 K and 3.5 × 10^−3 (M−^1sec^−1) at 650 K. a. −166 kJ/mol b. 166 kJ/mol c.... more
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General Chemistry

06/15/16

If 200 cubic centimeters of hydrogen is reacted with 50 cubic centimeters of oxygen to form liquid water how much of which has is left over
200 cubic cm reacts with 50 cubic cm of oxygen to form liquid water. How much of which has is left over?
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General Chemistry Chemistry

06/09/16

WHAT IS EQUILIBRIUM CONSTANT IN TERMS OF PARTIAL PRESSURE?
At 5 atm pressure PCl5 gas dissociates by 10%. What will be the value of Kp at same temperature?
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General Chemistry Chemistry

06/09/16

choose the correct option
In Haber’s process 0.240 mole of Nitrogen, 3.9 moles of hydrogen are taken whichlead to the formation of 7.8 moles product in a 3.00 litres of reaction vessel at375oC. Considering that equilibrium... more
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General Chemistry Chemistry

05/23/16

Please help with this question thanks!
Three experiments are performed under identical conditions to measure the initial rate of the reaction described by the equation 2N2O5(g)--> 4NO2(g)+O2(g). The results of the three experiments,... more
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General Chemistry Chemistry

05/23/16

Please help with this problems I'm having major trouble with it and show work. Appreciate it! there are 2 parts to the question
Question Three experiments that have identical conditions were performed to measure the initial rate of decomposition of ammonia on a platinum surface: 2NH3(g)--> N2(g) + 3H2(g). The results... more
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General Chemistry Chemistry Chem

05/17/16

Question is below... I'm a lot of trouble with these problems please help and show work and answer thanks appreciate it!
Question #1 At a certain temperature, the equilibrium constant Kc is 0.154 for the reaction    2SO2 (g) + O2 (g) <--> 2SO3 (g)   What concentration of SO3 would be in equilibrium with... more
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General Chemistry Chemistry Enthalpy

05/15/16

Enthalpy problem need help asap
CH3OH (l) + 3/2 O2 (g) -> CO2 (g) + 2H2O (l)   delta h = -726.5 kJ   calculate the mass of methanol needed to create 6.90 x 10^4 J of heat
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05/14/16

If the temperature of argon gas is 400 K and the average velocity of argon is twice that of radon what is the temperature of radon gas?
The answer key says it is 555 K. How do I approach this question? 
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General Chemistry Chemistry

05/11/16

Please help thanks! Show work and answer thanks
Question #1  4.86 g of Ag2SO4 will dissolve in 1 l of water. Calculate the solubility product constant for this salt    Question #2 H2  and Cl2  combine to for HCl. In a gas phase equilibrium... more
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General Chemistry Chemistry Chemist

05/11/16

Please help with these questions I'm a lot of trouble with them... Please show work and answer thanks!
Question #1 What is the pH of a water solution at 25 degrees celsius in which the hydroxide ion concentration is 1.7 x 10 -6 mol/L?   Question #2  Calculate the hydrogen ion concentration for a... more
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General Chemistry Chemistry

05/09/16

I need major help with these... Please show work and answer thank you!
Question #1 The pH of a saliva sample was measured as 6.7 Convert the pH into the molarity of H3O+ ions.  Answer in units of mol/L.    Question #2 A solution of HClO is mixed and found to have... more
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General Chemistry Chemistry

05/09/16

I need help on these 2 questions please. Show work and answer thanks!
Question #1 What is the pH of a solution prepared by dissolving 0.064 moles of benzoic acid (C6H5COOH)  and 0.062 moles of sodium benzoate in 100 mL of water? (ka for benzoic acid is 6.3 x... more
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General Chemistry Chemistry

05/09/16

I need major help on these 2 questions. If possible show answer and work thank you!
Question #1 What is the pH at 298 K of a 0.7 M solution of acetic acid, which has an ionization constant of 1.8 x 10-5 ? answer in units of pH   Question #2 Calculate the percent ionization of... more
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General Chemistry Chemistry Density

05/05/16

Density problem
Sodium metal (atomic weight 22.99 g/mol) adopts a body-centered cubic structure with a density of 0.97 g/cm3.   If it didn't react so vigorously, sodium could float on water. Use the answer from... more
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General Chemistry

04/26/16

what is 25.0 plus or minus 0.3 mL?
How much this value equal to?
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