10/21/24

At 460 K, the rate constant for this reaction is k = 5.8 × 10–6 s–1 and the activation energy is Ea = 265 kJ/mol. What is the frequency factor for this reaction?

The compound 1,1-difluoroethane decomposes at elevated temperatures to give fluoroethylene and hydrogen fluoride according to the equation: CH3CHF2----->CH2CHF+HF
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10/21/24

Calculate the value of the equilibrium constant for the following reaction.
Given:2C <==> D ... Kc = 6.52x10-4Given:D <===> 3A + 3B ... Kc = 4.32x10-2A + B <==> C
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10/10/24

Energy Released for a Photon of Light.
A bright violet line occurs at 435.8 nm in the emission spectrum of mercury vapor. What amount of energy must be released by an electron in a mercury atom to produce a photon of this light?Please... more
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10/07/24

An atom of carbon-11 emits a positron. Express your answer as a nuclear equation.
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10/06/24

The average teacher's salary in a particular state is $54,148. If the standard deviation is $10,210 , find the salaries according to the z-score, z=3
The average teacher's salary in a particular state is $54,148. If the standard deviation is $10,210 , find the salaries according to the z-score, z=3
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10/02/24

Finding the pH of a solution of Benzoic acid
What is the pH of a 0.050 M solution of benzoic acid (pKa = 4.2)? Please assist by showing the step-by-step computation.
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12/11/23

Chemistry Mol/L
What is the answer to this question? "A chemist prepares a solution of mercury(II) iodide HgI2 by measuring out 4.02mg of mercury(II) iodide into a 250. mL volumetric flask and filling the flask to... more
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12/11/23

Chemistry (moles)
What would the answer be to this question? "A chemist adds 0.25L of a 0.949M sodium carbonate Na2CO3 solution to a reaction flask. Calculate the moles of sodium carbonate the chemist has added to... more
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12/02/23

Calculate Standard Potential and Equilibrium Constant
The standard potentials for the reduction of nicotinamide adenine dinucleotide (NAD+) and oxaloacetate (reactants in the multistep metabolism of glucose) are as follows:Oxaloacetate2- (aq) +... more
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11/10/23

find the equation of a line perpendicular to 2x+2y=-2 that passes through the point (9,8)
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11/10/23

Which statement is logically equivalent to the following conditional statement? "If it has exactly four sides, then it is not a hexagon."

Which statement is logically equivalent to the following conditional statement? "If it has exactly four sides, then it is not a hexagon." If it does not have exactly four sides, then it is not a... more
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11/09/23

What is the value of K in this equilibrium?
At equilibrium, an aqueous solution of formic acid (HCHO2) has these concentrations: [H+] =0.0067 M;[CHO2-]= 0.0067 M; and [HCHO2]=0.249HCHO2(aq) ⇌ H+ (aq) +CHO2- (aq)What is the value of K in this... more
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11/04/23

Theoretical yield of chemical reactions
Aqueous hydrobromic acid (HBr)reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H2O). What is the theoretical yield of sodium bromide formed from... more
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11/03/23

chemistry problem i am stuck on

Ammonia gas and oxygen gas react to form water vapor and nitrogen monoxide gas. What volume of water would be produced by this reaction if 7.07 L of ammonia were consumed? Also, be sure your answer... more
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11/03/23

Chemical Reaction

When heated, solid calcium chlorate decomposes into solid calcium chloride and releases oxygen gas. What is the formula equation from the word equation?
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11/03/23

Calculate the concentration of the HCl solution.
By titration, it is found that 85.5 mL of 0.177 M NaOH(aq) is needed to neutralize 25.0mL of HCl(aq). Calculate the concentration of the HCl solution.[HCl]=?M
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11/02/23

Identify each of the following compounds as either a strong acid, weak acid, strong base, or weak base.

The compounds are as follows: HNO3, HBr, H2CO3, HF, NH4Cl, K2SO3, KOH, RbOH, and (CH3)3N
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11/02/23

Complete and balance the equations according to acid and base behavior in water.

Complete and balance the equations according to acid and base behavior in water. Phases are optional. H2OHNO3(aq)-----> H2OBa(OH)2... more
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10/31/23

Consider the reaction: heat released

Consider the reactionB2H6(g) + 3 O2(g) → B2O3(s) + 3 H2O(g) ∆H = -2035 kJHow much heat is released when a mixture of 4.37 g B2H6 and 3.81 g O2 is burned?heat released
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10/31/23

Can anyone help me in this. My answer is coming wrong
Determine if the triangle with the given vertices is a right triangle, isosceles triangle, neither, or both.(Recall that a right triangle satisfies the Pythagorean theorem and an isosceles triangle... more
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10/31/23

Can anyone help me in this. My answer is coming wrong
Determine if the triangle with the given vertices is a right triangle, isosceles triangle, neither, or both.(Recall that a right triangle satisfies the Pythagorean theorem and an isosceles triangle... more
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10/30/23

Find the average yearly salary of an individual with each of these final degrees.
Suppose the average yearly salary of an individual whose final degree is a master's is $35 thousand less than twice that of an individual whose final degree is a bachelor's. Combined, two people... more
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10/30/23

Brain equation of the line described passes through (7,-7) perpendicular to the line Y = - + x 1

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10/28/23

Solving limiting reactant problems in solution
Suppose 29.0g of sodium chloride is dissolved in 300.mL of a 0.70 M aqueous solution of potassium carbonate. Calculate the final molarity of chloride anion in the solution. You can assume the... more
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10/27/23

6) Calculate the internal energy change when 1 mole of iron is cooled from 45°C to 13°C (specific heat capacity of iron is 0.449 J/g K).
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