03/16/20

A buffer that contains 0.11 M of an acid, HA and 0.49 M of its conjugate base
A buffer that contains 0.11 M of an acid, HA and 0.49 M of its conjugate base A-, has a pH of 4.24. What is the pH after 0.022 mol of HCl are added to 0.53 L of the solution?The answer is 4.06
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03/16/20

Calculate the pOH of a solution that results from mixing 46 mL of 0.11

Calculate the pOH of a solution that results from mixing 46 mL of 0.11 M trimethylamine ((CH3)3N) with 17 mL of 0.13 M (CH3)3NHCl. The Kb value for (CH3)3N is 6.5 x 10-5The answer is 3.83
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03/16/20

I can’t find the answer.
Consider the hypothetical reaction A+3B➡️2C. If 3.8 moles of reactant B is combined, how many moles of C can be formed?
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03/14/20

An inhibitor binds to a site other than the active site of the enzyme. Which statement below correlates with this observation?

a. The inhibition must be irreversible. b. It could be noncompetitive or uncompetitive inhibition. c. It must be a competitive inhibitor. d. It could be irreversible, competitive, noncompetitive or... more
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03/14/20

Write the balanced equation for the rusting of iron in which iron reacts with oxygen to form iron(III) oxide. Phases are optional.

Write the balanced equation for the rusting of iron in which iron reacts with oxygen to form iron(III) oxide. Phases are optional.
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03/13/20

If you start with 2 grams of aluminum metal, how many moles of H2 gas would you expect to produce?

I need this ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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03/13/20

if 4.3 mol of Zn is combined with 7.3 mol of HCl, which is the limiting reactant?
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03/13/20

Buffer Capacity

Buffer capacity is a measure of a buffer solution's resistance to changes in pH as strong acid or base is added.Suppose that you have 175 mL of a buffer that is 0.480 M in both benzoic... more
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03/13/20

What is the pH of an acid with a [H+] of 1.0 x 10^-2 M?
10247
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03/13/20

119 mL of HCl is titrated with 0.12 M NaOH. If the equivalence point is reached when 72 mL of NaOH is added, then what is the concentration of the HCl solution?
7.3 M8.64 M .073 M.864M
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03/13/20

Chemistry : Buffers
An aqueous solution contains 0.34 M potassium fluoride.One liter of this solution could be converted into a buffer by the addition of:(Assume that the volume remains constant as each substance is... more
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03/13/20

What is the empirical formula of a compound composed of 34.3 g of potassium ( K ) and 7.02 g of oxygen ( O )?

What is the empirical formula of a compound composed of 34.3 g of potassium (K) and 7.02 g of oxygen (O)? 
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03/13/20

A 19.15 g sample of a compound contains 6.11 g of potassium, K , 5.54 g of chlorine, Cl , and oxygen, O . Calculate the empirical formula. Insert subscripts as needed.
A  sample of a compound contains  K,  Cl, and oxygen, O. Calculate the empirical formula.Insert subscripts as needed.
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03/12/20

Chemistry problem for HW
How many milliliters of an aqueous solution of 0.189 M chromium(II) acetate is needed to obtain 18.3 grams of the salt?
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03/12/20

How do you find the limiting reagent when lead(II) nitrate solution is reacted with potassium iodide solution if 20 cm3 of each reactant is used
There is 0,302 mol dm3 of lead (II) nitrate solution and 0,302 mol dm3 of potassium iodide solution
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03/12/20

What will happen to the carbon skeleton of the deaminated amino acid when excessive protein and calories are consumed?
A. It is metabolized by the liver to ureaB. They will be metabolized to fatc. They will be metabolized to ketones
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03/12/20

Hess's Law, enthalpy,entropy,Gibbs free energy change Problem.
For the following unbalanaced reaction at 25°CPbCO3(s)-->PbO(s)+CO2(g)Calculate the standard enthalpy change, change in H° for the reactionCcalculate the standard entropy change, change in S°... more
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03/11/20

How many grams of AG will be produced from 5.00 g of CU in 1.00 g of AgNO3
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03/11/20

Water Phase Diagram

The diagram is a water phase diagram. It relates the phases of water for different states or combinations of temperature and pressure. For which phases can water exist for pressures below 4.579... more
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03/11/20

chemistry kinetics rate law
Give the characteristics of a first order reaction having only one reactanta) the rate of the reattion is not proportional to the concentration of the reactant b) the rate of the reaction is... more
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03/11/20

Please help me answer these chemistry questions :(
1. Calculate the equilibrium concentrations and pH for a 0.20 M proprionic acid, a solution of a weak acid. Ka = 1.3 x 10^-5[H+][C3H5O2]Ka = _______________ [HC3H5O2] 2. Calculate the equilibrium... more
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03/11/20

flourine gas at 729 torr pressure and 28 X has a volume of 283 mL. what is the new volume at STP.

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03/10/20

Chemistry 1211L
⦁ Consider the calibration curve for cobalt (II) nitrate. What is the concentration of a cobalt (II) nitrate solution with an absorbance of 0.24?
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03/10/20

Calculate the pH of a 0.10 M solution of sodium benzoate
Calculate the pH of a 0.10 M solution of sodium benzoate (NaC6H5COO) given that the Ka of benzoic acid (C6H5COOH) is 6.50 x 10-5.
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03/10/20

A sample of an ideal gas has a volume of 2.39 L at 288 K and 1.13 atm. Calculate the pressure when the volume is 1.32 L and the temperature is 303 K.
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