06/17/21

A 0.68 M solution of a weak acid with general formula HX is found to have a pH of 6.3

a) Finish the reaction when acid is added to water HX(aq) + H₂O(I) b) Write an expression for the acid equilibrium constant Ka c) Find [H₃O⁺] d) Calculate the value of Ka for this acid
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06/17/21

Indicate in the below reactions which of the reacting substances are acting as Bronsted acids (BA) which as Bronsted bases (BB)

Also, indicate which of the products are conjugate acids (CA) and bases (CB) a) H₂CO₃ + NH₃ → HCO₃⁻ +NH₄⁺ b) CH₃COOH + H₂O → CH₃COO⁻ + H₃O⁺
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06/17/21

what is the equilibrium expression for the formation of [Cu(BTAS)2] 2+
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06/17/21

Density Chemistry question (converting mol/L to %(m/m)
The density of the acetic acid (CH3COOH) solution is 1.05 g/mL. Calculate the %(m/m) of the acetic acid solution (convert mol/L to %(m/m)).
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06/17/21

A half-cell containing chlorine and chloride ions is connected to a half-cell containing nickel ions and nickel to form a voltaic cell.
Determine the proper direction for each half-cell reaction to assure a spontaneous, complete cell reaction, and find the value of E°.
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06/17/21

the solubility product constant for MX2 is 7.9*10-8 how many grams of MX2 (101.13 g/mol) will dissolve in 146 ml of water at 25 degrees
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06/17/21

Carry out each of the following conversations

Carry out each of the following conversations a. 62.25oz to g =_gb. 53in to cm = _ cm
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06/17/21

Scientific notation
A picosecond is one trillionth of a second (0.000 000 000 001 s) . (a) Write this number in scientific notation. (b) How many picoseconds are there in one second? Write this answer in scientific... more
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06/16/21

Write the net ionic equation,including phases, that corresponds to the reaction Cu(NO3)2(aq)+Na2S(aq)----->CuS(s)+2NaNO3(aq)3
ALL numbers in equation are subscripts
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06/16/21

can someone please help?
2 Cu + S  →  Cu2S When 98.6 g of copper reacts with 41.2 grams of sulfur What is the % yield if 96.2 grams of product are formed?
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06/16/21

I need help at this question
A half-cell containing Br and Br- is connected to a half-cell containing Mg+2 and Mg to form a voltaic cell. Determine the proper direction for each half-cell reaction to assure a spontaneous,... more
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06/16/21

chemestry homework
A reaction has a rate law of Rate = (1.25 M⁻¹s⁻¹)[A][B]. What is the rate of the reaction if [A] = 0.597 M and [B] = 0.280 M?
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06/14/21

A liquid shampoo has a hydroxide ion concentration of 6.8x10⁻⁵ mol/l
a) Calculate the hydronium ion concentrationb) What is the pH and pOH of the shampoo?
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06/14/21

H₂CO₃ is a dioprotic acid. It has two hydrogen ions that may be dissociated. Write an equation to show the dissociation of each proton
Write reactions that show HCO₃⁻ reacting with water and: HCO₃⁻ acts as an acid:HCO₃⁻ acts as a base
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06/14/21

Chemistry help plz
out Of the following, which of these salts is NOT soluble in water? NH4Cl , AgCl , Pb(NO3)2 ,Li2S
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06/14/21

An unknown element X has the following isotopes: ²⁵X (80.5% abundant) and ²⁷X (19.5% abundant). What is the average atomic mass in amu of X?
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06/14/21

In this reaction: Mg (s) + I₂ (s) → MgI₂ (s), if 10.0 g of Mg reacts with 60.0 g of I₂, and 60.68 g of MgI₂ form, what is the percent yield?
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06/14/21

Write the reaction and simplified ksp expression and dissociation of :
A) lithium carbonate B) Iron (III) hydroxide
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06/14/21

N2H4(ℓ) + O2(g) → N2(g) + 2 H2O(g). How many grams of water are produced when 15 g of pure hydrazine is ignited in the presence of 31 g of pure oxygen?

Hydrozine (N2H4) emits a large quantity of energy when it reacts with oxygen, N2H4(ℓ) + O2(g) → N2(g) + 2 H2O(g). How many grams of water are produced when 15 g of pure hydrazine is ignited in the... more
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06/13/21

Compute the pH of the solution after reaction of 53 mL of 0.65M HCN with 34mL of 0.39M KOH
HCN(aq)+KOH(aq)———-HOH(l)+KCN(aq)compute the moles of reactant before reaction 1)moles of acid____moles 2)moles of base _____moles moles of reactant and pH active after reaction excess of reactant... more
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06/13/21

Phosphoric acid H3PO4 is a triprotic acid meaning one molecule of the acid has three acidic protons estimate the pH and the concentration of all species in a 0.100M phosphoric solution.

Ka1: 6.9x10^-3Ka2: 6.2x10^-8Ka3: 4.8x10^-13find H3PO4 , OH- and pH
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06/11/21

(Stoichiometry)
1 C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) - Identify the Limiting Reactant in the following problem and identify how much of the excess reactant remains after the reaction has reached completion.... more
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06/11/21

PLZ HELP! DUE TODAYY
During an experiment, ice and water were placed in a perfectly insulated thermos flask at 0 °C. Describe this system when it phase reaches equilibrium
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06/11/21

Reaction; Rate Constant
For the following zero order reaction, the rate of reaction is 0.659 M/s and the [A]0 = 1.18 M. Calculate the rate constant.3 A -> 2 BWhat is the rate constant and the formula used?
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06/11/21

Catalyst of a Reaction
Consider the following reaction2 AX + 2 I → 2 AI + 2 Xwhere the following mechanism has been proposed:2 AX + B → A_2B + 2 XA_2B + 2 I → 2 AI + BMy question is what is the catalyst in this reaction... more
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