03/30/20

thermochemistry
A sample of flammable liquid is placed into an enclosed cylinder which is then fitted with a movable piston. Initially the cylinder contains a volume of 1.60 L. The sample is ignited producing gas... more
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03/30/20

Which of the following would be more soluble in an acidic solution?
Which of the following would be more soluble in an acidic solution?CsF(s) or RbI(s)I assume it would be CsF and I also make the assumption that it means more soluble in an acidic solution as... more
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03/29/20

Chemistry question about colligative properties
Colligative properties are properties of solutions that depend on __________________ . only the number of ions dissolved whether the solute is an electrolyte or a non-electrolyte the charges of the... more
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03/29/20

Calorimetry: How to Find Heat Lost?
In Part 1 of the lab you will test how well a coffee cup calorimeter matches the ideal case. You will do this by adding a known mass of warmer than room temperature water (at a known temperature)... more
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03/29/20

Calculate the pH at the halfway point and at the equivalence point for each of the following:
Calculate the pH at the halfway point and at the equivalence point for each of the following:a) 100.0 mL of 0.10 M HC7H5O2 (Ka = 6.4 x 10-5) titrated by 0.10 M NaOHb) 11.0 mL of 0.10 C2H5NH2 (Kb -... more
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03/29/20

Consider the titration of 100.0 mL of 0.20 M acetic acid (ka = 1.8x10^-5) by 0.10 M KOH.
Consider the titration of 100.0 mL of 0.20 M acetic acid (ka = 1.8 x 10-5) by 0.10 M KOH. Calculate the pH of the resulting solution after the following volumes of KOH have been added.a) 200.0 mLb)... more
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03/28/20

Consider a solution that is 1.0 x 10-5 M NaCl and 1.0 x 10-5 M AgNO3.
The Ksp of AgCl at 25 oC is 1.6 x 10-10. Consider a solution that is 1.0 x 10-5 M NaCl and 1.0 x 10-5 M AgNO3.Answer is Q < Ksp and a precipitate will not form.I am confused why that is the answer
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03/28/20

The bonding of Acetylcholine to its muscarinic receptors on smooth muscle causes gated K+ channels to close. This action is described as what?
Would it be inhibitory or excitatory and would the cell depolarize or hyper-polarize?
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03/28/20

Chemistry question about solutions

Select the best term that completes this statement: Solvents dissolve solutes because the two substances have ________________ intermolecular... more
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03/28/20

Calculation enthalpy of solution
Hi!I have calculated the enthalpy of solution for hydrous copper sulfate but I dont know if I did it right or wrong. Can someone please check for me?Calculations for solution of CuSO4 * 5... more
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03/28/20

A 10.00mL solution of 0.2504M H3PO4 was titrated with standard 0.1010M NaOH. What volume of the bases was required to neutralized the acid

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03/28/20

Determine the [OH-] and the [H+], and the pH of the following solutions
Determine the [OH-] and the [H+], and the pH of the following solutions.A. 1.0 M KClB. 1.0 M KC2H3O2I know the answer for A is [OH-] and [H+] is 1.0x10-7 because KCl is neutral due to coming from a... more
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03/28/20

For the following reaction, 6.56 grams of perchloric acid are mixed with excess tetraphosphorus decaoxide. The reaction yields 1.73 grams of phosphoric acid.
For the following reaction, 6.56 grams of perchloric acid are mixed with excess tetraphosphorus decaoxide. The reaction yields 1.73 grams of phosphoric acid.perchloric acid (aq) + tetraphosphorus... more
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03/28/20

For the following reaction, 5.48 grams of ethylene are mixed with excess hydrogen gas . The reaction yields 5.52 grams of ethane.
For the following reaction, 5.48 grams of ethylene are mixed with excess hydrogen gas . The reaction yields 5.52 grams of ethane.hydrogen ( g ) + ethylene ( g ) ---> ethane ( g )What is the... more
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03/28/20

For the following reaction, 13.5 grams of nitrogen monoxide are allowed to react with 5.17 grams of oxygen gas .
For the following reaction, 13.5 grams of nitrogen monoxide are allowed to react with 5.17 grams of oxygen gas .nitrogen monoxide(g) + oxygen(g) ---> nitrogen dioxide(g)What is the maximum mass... more
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03/28/20

For the following reaction, 4.92 grams of hydrogen gas are allowed to react with 10.2 grams of ethylene (C2H4) .
For the following reaction, 4.92 grams of hydrogen gas are allowed to react with 10.2 grams of ethylene.hydrogen(g) + ethylene(g) ---> ethane (g)What is the maximum mass of ethane that can be... more
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03/28/20

What mass of Zn(NO3)2 is needed to make 0.53 L of 0.77 M solution.

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03/28/20

Equilibrium constant questions
What is the numerical equilibrium constant of the following reaction at 25˚C? HCNO(aq) + RbOH(aq) ⇄ RbCNO(aq) + H₂O(l) Assume that RbCNO(aq) is a strong electrolyte.For the following two I was... more
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03/28/20

Rust (What Chemical Reaction is Rust?)
What is the chemical reaction which causes rust?
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03/27/20

Chemistry question about solutions (acid and basic)
What ultimately occurs in the ionization process of a weak acid or base? It eventually reverses completely to reform the un-ionized acid or base molecules It eventually goes 100% to completion. It... more
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03/27/20

The Ksp of AgCl at 25 C is 1.6*10^-10. Consider a solution that is 1*10^-6 M CaCl2 and 1*10^-5 M AgNO3.
The answer is Q < Ksp and a precipitate will not form.How do you set up the calculation?
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03/27/20

pH and equilibrium problems
Which of the following would be more soluble in an acid solution a) LiBr(s) or b) KNO3(s)?What is the pH of a saturated solution of Ni(OH)2(aq) at 25 degrees Celsius?What is true about the... more
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03/27/20

Find the mass of AlCl3 that is produced when 30.0 grams of Al2O3 react with 30.0 grams of HCl according to the following equation.
Al2O3(s) + 6HCl(aq) -> 2AlCl3(aq) + 3H2O(aq)
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03/27/20

Answer the following questions based on the following unbalanced reaction _Fe+_O2 -> _Fe2O3
a. How many moles of oxygen gas will be able to react with 3 moles of iron?b. How many grams of ferric oxide would be produced from 7 moles of O2?
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03/27/20

A classmate states, “All compounds containing H atoms are acids, and all compounds containing OH groups are bases” Do you agree or disagree? Give examples.

Give me great detail please
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