03/24/21

Using the Lewis structure of H2 hydrogen gas, O2 oxygen gas, and N2 nitrogen gas determine which one contains a single bond? Which one contains a double bond? Which one contains a triple bond?
Using the Lewis structure of H2 hydrogen gas, O2 oxygen gas, and N2 nitrogen gas determine which one contains a single bond? Which one contains a double bond? Which one contains a triple bond?
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03/24/21

How many grams of molybdenum can be deposited from a solution containing aqueous Mo(NO3)3 by supplying 25.0 Amps of current for 12.0 hours?

The molar mass of Mo is 95.96 g/mol. The Faraday constant is 96485 C/mol e-
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03/24/21

In the following chemical reaction: 2𝐻𝐶𝑟𝑂−4(𝑎𝑞) + 8𝐻 + (𝑎𝑞) + 3𝐶𝑙𝑂−3 (𝑎𝑞) → 2𝐶𝑟3+(𝑎𝑞) + 5𝐻2𝑂(𝑙) + 3𝐶𝑙𝑂−4(𝑎𝑞) What element is being reduced?
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03/24/21

Which of the following is an example of a monoprotic acid?
H2SO4H3PO4HC2H3O2H2S
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03/24/21

What is the density of sulfur dioxide gas at 90.0 kPa and 45°C?

(Answer: 2.18 g/L)Can someone explain how to do this problem please?
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03/24/21

n the titration of 25.0 mL of 0.15 M butanoic acid, CH3CH2CH2CO2H, with 0.20 M sodium hydroxide, what will be the pH at the equivalence point? The Ka for butanoic acid is 1.5 x 10-5.
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03/24/21

Given the following thermodynamic data, determine K at 298K for the reaction of NO3 and NO2 to produce N2O5.

NO3(g) + NO2(g) ⇌ N2O5(g)                       ∆H°Rxn     = -45.2 kJ∆S°Rxn      = -75.5 J/K∆G°Rxn,298  = -32.7 kJ
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03/24/21

Indicate whether the following inorganic compounds are soluble or insoluble in water. AgCl
Indicate whether the following inorganic compounds are soluble or insoluble in water. AgCl
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03/24/21

Indicate whether the following inorganic compounds are soluble or insoluble in water. KNO3
Indicate whether the following inorganic compounds are soluble or insoluble in water. KNO3
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03/24/21

chemistry help please
For the following combination of reactants, enter the formulae of the products in the space provided and give their physical states. (Separate multiple products with a comma ",". Type your answer... more
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03/24/21

Determine the empirical & molecular formula of a compound...
with a molar mass of 90.04g/mol that contains 26.7% C, 2.20% H, and 71.1% O.
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03/24/21

How many bonds and lone pairs does OCN-1 have?
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03/24/21

Calculate the pH of an aqueous solution of the salt NaA, which was made to a concentration of 0.080 M NaA. The Ka of the weak acid HA is 2.0 x 10-5.
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03/24/21

Which of the following salts when dissolved in water will yield a solution with a basic pH?
Na2CO3b. KHCO3c. NaFd. NH4Cle. NaHSO4
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03/24/21

Caculate the pH of a solution prepared by mixing 93 mL of a 0.25 M aqueous aniline solution (C6H5NH2, Kb = 4.3 x 10-10) with 100. mL of a 0.11 M aqueous nitric acid solution.
I got a pH of 4.68 when I solved it but my teacher got a pH of 9.30 and I'm confused of how she got 9.30.
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03/24/21

What is the concentration of a solution of Ca(OH)2 for which the pH is 11.68?
is my answer of 2.39x10^-3M correct?
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03/24/21

buffer preperation
1) How many moles of sodium hydroxide would have to be added to 125 mL of a 0.343 M hydrocyanic acid solution, in order to prepare a buffer with a pH of 9.390?=moles
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03/24/21

Finding Ratio to Prepare Buffer
What ratio of NaCN to HCN is needed to prepare a pH 9.50 buffer? (Ka of HCN is 4.9 × 10⁻¹⁰)
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03/24/21

Buffers and Ksp

What is the solubility of La(IO₃)₃ in water? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)I tried doing 7.5x10^-12= (3x)^3 so then I got 7.5x10^-12/ 27 = x^3 and from there I took the cube root and got... more
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03/24/21

Molar Solubility of Compound
What is the solubility of PbF₂ in a solution that contains 0.0900 M F⁻ ions? (Ksp of PbF₂ is 3.60 × 10⁻⁸)
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03/24/21

Please help me with these Chemistry questions.

For most solid solutes in solvent, what is the general trend?a. molarity of the solution doublesb. solubility is not affected by temperaturec. solubility increases as temperature increasesd.... more
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03/24/21

How many formula units/molecules are in 175.0 grams of barium acetate?
Identify if the units should be formula units or molecules.
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03/24/21

A 5.00 g sample of compound contains 2.43 g of carbon, 0.41 g of hydrogen, and the remainder of the mass is oxygen. Its molecular mass is 74.09 g/mol. Answer the following questions:
a. What is the empirical formula of the compound?b. Show mathematical proof along with explaining why the empirical formula and the molecular formula are the same?c. Draw a possible, valid Lewis... more
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03/24/21

Spontaneous processes are ones that occur quickly and have a low activation energy.
True or FalseFalse - Spontaneous processes always require an input of energy to overcome activation energy but always react quicklyFalse - spontaneous processes can occur slowly but always have a... more
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03/24/21

Equilibrium chem
The Ka of a monoprotic weak acid is 0.00244. What is the percent ionization of a 0.137 M solution of this acid?
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