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General Chemistry Chemistry College Chemistry

12/08/14

chemistry, A 8.10-L container holds a mixture of two gases at 51 °C.

A 8.10-L container holds a mixture of two gases at 51 °C. The partial pressures of gas A and gas B, respectively, are 0.308 atm and 0.520 atm. If 0.120 mol of a third gas is added with no change in... more

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General Chemistry Chemistry College Chemistry

12/08/14

A gaseous compound has a density of 1.56 g/L at 27.0 °C and 1.33 atm. What is the molar mass of the compound?

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General Chemistry Chemistry College Chemistry

12/08/14

Chemistry Ideal Gas Problem, A hot air balloon is filled with 1.19 × 106 L of an ideal gas on a cool morning (11 °C)

A hot air balloon is filled with 1.19 × 106 L of an ideal gas on a cool morning (11 °C). The air is heated to 113 °C. What is the volume of the air in the balloon after it is heated? Assume that... more

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General Chemistry Chemistry Chemical Reactions College Chemistry

12/06/14

Chemistry, find standard heat of reaction of this reaction. Please help me understand how to do these problems

This question is about the reaction4HCl(g)+O2(g)-->2H20(g)+2Cl2(g)A) Using the values of ΔfH°, find the standard heat of the reaction of this reaction.B) Using average bond energies, estimate... more

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General Chemistry Chemistry College Chemistry

12/04/14

Chemistry Homework, need some help

If 29.5 moles of an ideal gas is at 2.29 atm at 32.70 °C, what is the volume of the gas?

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General Chemistry Chemistry Chemical Reactions College Chemistry

12/04/14

Chemistry Question, I need some help please

This question is about the reaction 4HCl(g)+O2(g)-->2H20(g)+2Cl2(g)A) Using the values of ΔfH°, find the standard heat of the reaction of this reaction.B) Using average bond energies, estimate... more

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General Chemistry Chemistry College Chemistry Chemistry Lab

12/02/14

Chemistry Lab, Calculated Concentration Problem. I really need help!!

If there was an impurity in KHP, how would the concentration of the KHP solution differ from that calculated? Would the calculated concentration of the KHP solution would be higher/lower/ or... more

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General Chemistry Chemistry

12/02/14

chemistry, Calculate the ?E of the gas in J

The work done when a gas is compressed in a cylinder is 299 J. A heat transfer of 70 J occurs from the gas to the surroundings. Calculate the ?E of the gas in J, being sure to use correct sign... more

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General Chemistry

11/15/14

125 kj of heat energy is added to 10 kg of water at 25 ° C. Whats is the final temperature of the water?

Q= m*Cp(Tf-Ti) Cp= 4.184j/g °C

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General Chemistry

10/29/14

Hey could you help solve my chemistry problem? It dealing with the top quark in the nucleus of an atom.

What is the minimum uncertainty in the momentum of the top quark? radius is 7.77fm h=6.626x10^-34 J⋅s c=3x10^8 m/s mt=1.01⋅10^-33 kg

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General Chemistry

10/16/14

Dilution: Ions in Mixed Solutions

In the laboratory a student combines 42.1 mL of a 0.373 M sodium carbonate solution with 24.0 mL of a 0.311 M potassium carbonate solution. What is the final concentration of carbonate anion ? ?M

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General Chemistry Chemistry Density Chem Lab

10/02/14

How does contamination of water in a volumetric pipet affect density when calculating the density of an unknown substance?

Before getting to my question, I will state some background information that isn’t necessarily relevant to my question.In our chemistry lab, we initially calibrated how much water we delivered on... more

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General Chemistry Chemistry Basic Chemistry Solubility Rules

09/22/14

What is the net ionic equation when these compounds are combined/reacted?

I am having a really hard time understanding aqueous reactions and net ionic equations in chemistry. I would really appreciate some step-by-step instructions on these questions... 1) Consider... more

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General Chemistry Chemistry

07/09/14

Converting from mol/L to mmol/mL

On my lab report sheet, I am asked several times to convert concentrations and standard deviations from mol/L to mmol/mL and asked to show the unit conversion calculation required. I am confused,... more

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General Chemistry

12/12/13

Balance and include physical states

Calcium Sulfide in water is added to Cobalt(II) Nitrate in water to produce Calcium Nitrate in water and Cobalt(II) Sulfide in water.

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