04/18/20

Help with chemistry
The temperature of a sample of aluminum increased by 22.0 C when 269 J of heat was applied.lead 0.128silver 0.235copper 0.385iron 0.449aluminum 0.903What is the mass of the sample?
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04/18/20

Show that the following equation obeys the Law of Conservation of Mass. The amount of the products equals the amount of the reactant. You begin with 247 grams of KClO3 2KClO3  2KCl + 3O2

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04/18/20

2. Calculate the amount of Cu that can be produced from160.0 g of Al, given the following equation. 2Al + 3CuSO4  Al2(SO4)3 + 3Cu
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04/18/20

Given the following balanced equation determine the amount of MgCl2 that can be produced from 65.0 grams of Mg. Mg + HCl  MgCl2 + H2
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04/18/20

chemistry help q
A certain weak base has a K b of 7.90x10^-7. What concentration of this base will produce a pH of 10.30?
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04/18/20

Chemical Reactions (Balancing + Explanations)
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04/17/20

Ideal gas law Chemistry
1) What is the mass of oxygen gas in a 16.8 L container at 7.00◦C and 5.03 atm?
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04/17/20

1.) How much 3.0 M HBr is needed to neutralize 90 mL of 0.5 M NaOH? 2.)20 mL of HCl is neutralized by adding exactly 5 mL of 2.0 M KOH. What is the concentration of the HCl?

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04/17/20

Chemistry Question
A 300g piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by heat to the copper is 6,500 J. If the specific heat of copper is 0.390 J/g0C, what is the change... more
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04/17/20

for chem I need help in a galvanic question

consider a voltaic cell made up of copper and sodium half cells. Write the half reactions, the balanced overall reaction, and determine the cell potential under standard conditions. Spontaneous or... more
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04/17/20

Chemistry math help
A1555kg car is traveling down the road at 90.6 km/h. While traveling at this rate of speed, what is the kinetic energy of this vehicle in kilojoules?
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04/17/20

Practice Question # 6 Gram to gram mole ratio stoichiometry
Copper I iodide, CuI, is not stable enough to last long in storage, so it is generally made just prior to use. It can be prepared from copper sulphate and hydriodic acid by the following reaction.... more
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04/17/20

Chemistry math help
What concentration of NO-3 results when  893 mL of 0.509 M NaNO3 is mixed with 793 mL of 0.695 M Ca(NO3)2
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04/17/20

Chemistry math help
By titration, it is found that 28.7mL of 0.132 M NaOH(aq) is needed to neutralize 25.0 mL(aq) of  Calculate the concentration of the HCI solution.
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04/17/20

Chemistry math help
What concentration of CI- results when 991mL of  0.763M LiCl is mixed with 717mL of 0.693 M MgCl2
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04/17/20

AP Chemistry FRQ
PbI2(s)⇄Pb2+(aq)+2I−(aq)     Ksp=7×10−9The dissolution of PbI2(s) is represented above.(a) Write a mathematical expression that can be used to determine the value of S , the molar solubility of... more
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04/17/20

Chemistry Equilibrium Question
For the reaction N2O4(g)  2NO2(g) , Kp = 0.25 at a certain temperature. Calculate the equilibrium pressures of NO2(g) and N2O4(g) if the initial pressure(s) of the components when placed in an... more
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04/17/20

Chemistry Equilibrium Question
At a particular temperature, K = 2.74 for the reactionSO2(g) + NO2(g)  SO3(g) + NO(g)If all four gases had initial concentrations of 1.00 M, calculate the equilibrium concentrations:[SO2]... more
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04/17/20

Chemistry Equilibrium Problem
The reaction H2(g) + I2(g)  2HI(g) has Kp = 45.9 at 763 K. A particular equilibrium mixture at 763 K contains HI at a pressure of 3.35 atm and H2 at a pressure of 2.53 atm. Calculate the... more
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04/17/20

Chemistry Equilibrium Problem
At a particular temperature the following system is at equilibrium in a closed container:2NOCl(g)  2NO(g) + Cl2(g)Analysis of the equilibrium mixture shows it to have the following... more
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04/17/20

Percent Yield- Chemistry HW
An excess of sodium carbonate,  in solution is added to a solution containing  16.35 g CaCl2 .After performing the experiment, 13.39 g  of calcium carbonate,  is produced. Calculate the percent... more
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04/17/20

ou add 0.232 g NH4Cl to a 500-mL volumetric flask and dilute to the mark. What is the pOH of the final solution at equilibrium? For NH3, Kb= 1.8×10-5.
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04/17/20

How many mL of a 0.10 M NaOH solution are needed to neutralize 25.0 mL of 0.200 M H2SO4 solution?
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04/17/20

Arrange these species by their ability to act as an oxidizing agent.
Mg2+ Fe2+Pb2+Au3+
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04/16/20

To what volume should 222 mL of a 12.47 M solution of nitric acid be diluted to, to prepare a 2.58 M solution?
I just need to know the volume of this question, please help
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