25,990 Answered Questions for the topic chemistry

Chemistry

04/21/23

Chemistry related

When equilibrium has been reached in the reaction AE + CD →← CE + AD + x kJ in which all substances are in solution, (A) adding AE will increase the concentration of CE but not of AD. (B)... more
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Chemistry

04/21/23

Chemistry related question

Which is a proper description of chemical equilibrium? (A)The frequencies of reactant and of product collisions are identical. (B)The concentrations of products and reactants are identical. (C)The... more
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Chemistry

04/21/23

At STP, a sample of methane gas (CH4) is combusted to produce 1.2 L carbon dioxide. What volume of oxygen was required for the reaction to occur?
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Chemistry

04/21/23

How many grams of hydrogen, H2, would be required to produce 40.0 grams of ammonia, NH3?
Balance the following reaction, then answer the question below.H2(g) + N2(g) =   NH3(g)How many grams of hydrogen, H2, would be required to produce 40.0 grams of ammonia, NH3?
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Chemistry

04/21/23

What are the spectator ions in this equation?
Sodium thiosulfate + hydrochloric acid -> Sodium chloride + water + sulfur dioxide + sulfurNa2S2O3 (aq) + 2 HCl (aq) -> 2 NaCl (aq) + H20 (l) + S02 (g) + S (s)Break apart2Na + 2S + 3O + 2H +... more
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Chemistry

04/20/23

The kinetics of a gas phase reaction of the form A → Products results in a rate constant of 1.308 M⁻¹ s⁻¹.

For this reaction, the initial concentration of A is 0.571 M. What is the half-life for this reaction?. At what time would the concentration of A reach 0.042 M?
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Chemistry

04/20/23

The activation energy, Ea, for a particular reaction is 19.4 kJ/mol. If the rate constant at 80 °C is 0.820 M⁻¹s⁻¹, then what is the value of the rate constant at 243 °C? (R = 8.314 J/mol • K)
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Chemistry

04/20/23

The second order reaction A → Products takes 13.5 s for the concentration of A to decrease from 0.740 M to 0.293 M. What is the value of k for this reaction?
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Chemistry

04/20/23

The reaction A + 2B + C → Products has a rate law of Rate = k[A]²[B]. By what factor would the reaction rate change if [A] is tripled?
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Chemistry

04/20/23

For the reaction 4 A + 5 B → 2 C + 3 D, what is the magnitude of the rate of change for [D] when [A] is decreasing at 0.930 M/s?
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Chemistry

04/20/23

Specific Heat and Enthalpy
You put 10.0g ice into 22.0g liquid water at room temperature. The mixture at thermal equilibrium is made up of 75% liquid water and 25% ice. What was the temperature of the ice before mixing?
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Chemistry

04/20/23

Specific Heat and Enthalpy

You put 5g of ice into 30g liquid water at 20degrees Celcius. The water cools down to 5 degrees Celcius. What temperature was the ice?
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Chemistry

04/20/23

Energy required to change a spherical drop
What amount of energy is required to change a spherical drop of water with a diameter of 1.40 mm to two smaller spherical drops of equal size? The surface tension, 𝛾 , of water at room temperature... more
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Chemistry

04/20/23

Determine Ksp for Cu(IO3)2 by ICE Table. Molar solubility of Cu(IO3)2 is 2.7 x 10^-3
please provide ice table w/ changes
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Chemistry

04/20/23

If the prepared solution was made with 4.00 × 10⁻⁴ M lithium fluoride and 4.00 × 10⁻⁴ M of zinc chloride, evaluate the reaction quotient, Q, for zinc fluoride at these values.
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Chemistry

04/20/23

If the prepared solution was made with 4.00 × 10⁻⁴ M lithium fluoride and 4.00 × 10⁻⁴ M of zinc chloride, evaluate the reaction quotient, Q, for zinc fluoride at these values.
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Chemistry

04/20/23

Determine Ksp for Cu(IO3)2 by ICE Table. Molar solubility of Cu(IO3)2 is 2.7 x 10^-3
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Chemistry

04/19/23

8.58 grams of CaCl2 is dissolved in H2O. How many moles of CaCl2 dissolved?

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Chemistry

04/19/23

8.58 grams of CaCl2 is dissolved in H2O. How many moles of CaCl2 dissolved?

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Chemistry

04/19/23

How many coulombs of charge are necessary to produce 101 g of Al from Al³⁺(aq)? (F = 96,500 C/mol)
Please Answer :)How many coulombs of charge are necessary to produce 101 g of Al from Al³⁺(aq)? (F = 96,500 C/mol)
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Chemistry

04/19/23

Kinetics and Rate Law
What is the half-life for a particular reaction if the rate law is rate = (1301 M*min⁻¹)[A]⁰ and the initial concentration of A is 0.250 M?
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Chemistry

04/18/23

Help please due soon
determine the number of moles NaOH dispensed from the burst to completely react with KHP. 28 mL were dispensed. how do I get this to moles? My numbers aren’t coming out right.
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Chemistry

04/18/23

Chemical Reaction of organic chemistry Question see below

A Chemist reacts two unknown substances A and B. She then separates the products of this reaction into two equal amounts, in container X and in container Y. The container X, a strong oxidizing... more
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Chemistry

04/17/23

Stuck on chemistry problem due tonight

What is the pH and pOH of a solution that was made by adding 245 mL of water to 500 mL of 4 * 10 ^ - 4 M HF solution?PH?round to 1 decimal placepOH 1 decimal place
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Chemistry

04/17/23

Stuck on chemistry problem due tonight

What is the pH and pOH of a solution made by adding water to 23.2 grams of calcium hydroxide until the volume of the solution is 2500 ? (Hint: solve for molarity first !pOH?round to 1 decimal... more
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