04/15/20

In an exothermic reaction, which of the following conditions will be true?
activation energy minus energy of the products will be less than activation energy minus energy of reactantsactivation energy minus energy of the products will be greater than activation energy... more
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04/15/20

Compute the root-mean-square speed of Ar molecules in a sample of argon gas at a temperature of 72C
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04/15/20

Calculate the pressure of CO2 in the system, mmHg
Givens are:atmospheric pressure, mmHg = 756.92 mmHgtemperature of H2O = 21.0 degrees Celsius Vapor pressure of H2O at this temperature = 18.7 mmHg
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04/15/20

General Chemistry Question
Would acetaminophen be highly soluble in water? Or low soluble in water? Does it have something to do with the hydrogen bonding?
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04/15/20

Identify the conjugate base for each acid.
H2SO4 H2PO4^- NH4^+
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04/15/20

Compute the root-mean-square speed of At molecules in a sample of argon gas at a temperature of 102C?
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04/15/20

A sample of carbon dioxide gas collected at STP occupies a volume of 32.0 L. How manny moles of gas does this sample contain?
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04/15/20

1.12 mol sample of carbon dioxide gas at a temperature of 10.0 C is found to occupy a volume 25.5 liters. What is the pressure of this gas sample?
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04/15/20

How much energy is required to raise the temperature of 14.9 grams of solid platinum from 20.8 C to 40.0 C?
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04/15/20

The gas left in a used aerosol can is at a pressure of 2.3 atm at 25.7°C. If this can is thrown into a fire, what is the internal pressure of the gas in atm when its temperature reaches 132.7°C?
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04/15/20

How much energy is required to raise the temperature of 11.3 grams of solid graphite from 24.5 C to 36.0 C?
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04/15/20

A sample of nitrogen gas is stored in a 533.5 mL flask at 108 kPa and 10.0°C. The gas is transferred to a 750.0 mL flask at 29.1°C. What is the pressure of nitrogen in the second flask?
A sample of nitrogen gas is stored in a 533.5 mL flask at 108 kPa and 10.0°C. The gas is transferred to a 750.0 mL flask at 29.1°C. What is the pressure of nitrogen in the second flask?
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04/15/20

Chemistry Question 4.15.20
A 1.753 g sample of an unknown nonelectrolyte is dissolved in 25.00mL of cyclohexane. The resulting solution freezes at 2.46 oC, whereas the freezing point of pure cyclohexane is 6.47 o Cyclohexane... more
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04/15/20

Gas Law Chemistry
A weather balloon is filled with helium that occupies a volume of 6.32  104 L at 0.995 atm and 32.0°C. After it is released, it rises to a location where the pressure is 0.720 atm and the... more
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04/15/20

chemistry question
Which subshells (s, p, d, f, or g) can have electrons with the indicated magnetic quantum number (𝑚𝓁)?𝑚𝓁 = 0: _____𝑚𝓁 = 3: _____
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04/15/20

chemistry question
How many electrons in an atom could have these sets of quantum numbers?n = 3: _____ electronsn =5,ℓ=2: ______ electrons𝑛=7,ℓ=2,𝑚ℓ= -1: ______ electrons
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04/15/20

chemistry question
What quantum numbers specify these subshells? 5sn = ___ ℓ = ____ 2pn = ___ ℓ = ____ 6dn = ___ ℓ = ____
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04/15/20

chemistry question
For a particular isomer of C8H18, the combustion reaction produces 5099.5 kJ of heat per mole of C8H18(g) consumed, under... more
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04/15/20

chemistry question
Calculate the standard enthalpy change for the reaction at 25∘C. Standard enthalpy of formation values can be found in this list of thermodynamic properties.C3H8(g)+5O2(g)⟶3CO2(g)+4H2O(g)ΔH∘rxn =... more
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04/15/20

chemistry question
Using the standard enthalpies of formation, what is the standard enthalpy of reaction?CO(g)+H2O(g)⟶CO2(g)+H2(g)ΔH∘rxn = _____kJ
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04/15/20

Acid/Base equilibrium calculations
How many mol of solid LiA would have to be added to 1.0 L of a 3.726 M HA solution in order to obtain a buffer of 2.99? (The Ka for HA is 5.92⋅10−6).
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04/15/20

Acid/Base equilibrium calculations
A solution contains 0.308 M HA (Ka = 7.45⋅10−7) and 0.695 M NaA.  What is the pH of this solution after 0.192 mol of HCl are added to 1.00 L of this solution?
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04/15/20

Acid/Base equilibrium
A 0.828 M solution of the salt NaA has a pH of 8.67. Calculate the Ka value for the acid HA. Record your answer in scientific notation to 3 sig figs.
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04/14/20

Chemistry Lab Help
student prepares a dilute solution of sodium hydroxide, NaOH starting with 6 M sodium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH (aq), to a... more
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04/14/20

What is the hydroxide ion concentration of a 2.56 x 10^-3 M HCl solution?
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