02/10/23

How much heat is required to warm 1.70 L of water from 26.0 ∘C to 100.0 ∘C ? (Assume a density of 1.0g mL ^-1 for the water.)
Express your answer in joules to two significant figures.
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02/10/23

What is ΔrH∘ for the following chemical reaction?
CS2(g)+2H2O(l)→CO2(g)+2H2S(g)You can use the following table of standard heats of formation (ΔfH∘)(Δf�∘) to calculate the enthalpy of the given reaction. Express the standard enthalpy of reaction... more
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02/10/23

The answer to the problem
Use the following balanced equation to answer the question:             2NaOH + H2SO4 ------> 2 H2O + Na2SO4How many grams of H2O is produced from a reaction that uses 6 moles of NaOH?
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02/10/23

If 9.3 grams of calcium (Ca) and 5.5 grams of sulfur (S) are created, _________ grams of CaS were decomposed. Please fill in the NUMBER only in the box below.
If 9.3 grams of calcium (Ca) and 5.5 grams of sulfur (S) are created, _________ grams of CaS were decomposed. Please fill in the NUMBER only in the box below.
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02/10/23

How many grams of acetylene (C2H2) are produced by adding water to 5.00 grams CaC2?
CaC2 + 2H2O -----> C2H2 + Ca(OH)2
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02/10/23

Propane (C3H8) Burns in the presence of oxygen to produce carbon dioxide and water. what mass of propane will combust using 8.35 moles of oxygen?
C3H8 + 5O2 --> 3CO2 + 4 H2O
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02/10/23

Consider the elementary reaction equations shown.
A. A(g) + B(g) ---> C(g) + D(g)B. 2X(g) ---> Y(g) + Z(g) Write the rate law for reaction AWrite the rate law for reaction B
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02/09/23

How many grams of barium chloride are produced when 1.25x10^23 molecules of HCl reacts with barium according to the following equation?
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02/09/23

The half life of the first order reaction is 5.20*10^1 at 545K. Find the rate constant when the initial concentration is 0.030 M.
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02/09/23

The half life for the second order decomposition of HI is 15.4 S when the initial concentration of HI is 0.67 M. What is the rate constant for this reaction?
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02/09/23

Can you help me with this enthalpy problem?
The overall reaction in a commercial heat pack can be represented as shown below.4 Fe(s) + 3 O2(g)  2 Fe2O3(s)      ΔH = -1652 kJ(a) How much heat is released when 3.56 mol iron is reacted with... more
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02/08/23

Neutralizing Reactions
Consider the neutralization reaction : 2HNO3(aq)+Ba(OH)2(aq)⟶2H2O(l)+Ba(NO3)2(aq) A 0.110 L sample of an unknown HNO3 solution required 43.5 mL of 0.150 M Ba(OH)2 for complete neutralization. What... more
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02/08/23

The reaction C4H8(g)⟶2C2H4(g) has an activation energy of 262 kJ/mol. At 600.0 K, the rate constant, 𝑘, is 6.1×10−8 s−1. What is the value of the rate constant at 780.0 K?
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02/08/23

Which of the following molecules is expected to have an octahedral shape?
PCl3 PCl5 SF4 SF6
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02/08/23

Calculate the molality of a solution containing 8.95 g of ethylene glycol (C2H602) in 560 mg of water.
Ethylene glycol freezes at about -12°C, but when mixed with water, the mixture freezes at a lower temperature. Calculate the molality of a solution containing 8.95 g of ethylene glycol (C2H602) in... more
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02/08/23

Based on the structure of bromfenac, identify at least three (3) functional groups.
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02/08/23

What mass, in grams, of NaCl needs to be added to 2.7 kg of water in order to create a solution with a freezing point of -6.4 °C? The freezing point depression constant of water is 1.86 ºC/m.
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02/08/23

What is the total mass, in grams, of this solution?
A saturated sodium chloride solution is prepared by dissolving 36.0 g solid NaCl into 100.0 g water at 25°C.
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02/07/23

Initially, 0.980 mol of A is present in a 2.00 L solution.
Initially, 0.980 mol of A is present in a 2.00 L solution.2 A(aq) ⇌ 2 B(aq) + C(aq)At equilibrium, 0.110 mol of C is present. Calculate K.K=
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02/07/23

The reaction C4H8(g) → 2 C2H4(g)
The reactionC4H8(g) → 2 C2H4(g)has an activation energy of 262 kJ/mol. At 600.0 K, the rate constant, k, is 6.1 x 10^-8 s^1. What is the value of the rate constant 750.0 K?k = ____ s^-1
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02/07/23

Consider the given reaction. A(aq) + B(s) ⇌ C(aq) K = 9.40
Consider the given reaction.A(aq) + B(s) ⇌ C(aq) K = 9.40Suppose 13.9 mol A reacts with excess B in 7.90 L of solution. Calculate the concentration of C at equilibrium.[C] = _____ M
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02/07/23

Consider the reaction.
Consider the reaction.A(aq) ⇌ 2 B(aq) K = 2.54 x 10^-6 at 500 KIf a 5.00 M sample of A is heated to 500K, what is the concentration of B at equilibrium?[B] = _____ M
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02/07/23

At 403 K, this reaction has a Kc value of 0.0392.
At 403 K, this reaction has a Kc value of 0.0392.X(g) + 3 Y(g) ⇌ 2Z(g)Calculate Kp at 403 K. Note that the pressure is in unites of atmosphere (atm).Kp =
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02/07/23

Determine the average rate of change of B from t = 0 s to t = 212 s.
Determine the average rate of change of B from t = 0 s to t = 212 s.A ---> 2 BTime - Concentration of A (M)0 - 0.690106 - 0.395212 - 0.100rateB = ________ M/s
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02/07/23

Calculate the rate constant, k, for a reaction at 53.0 c

Calculate the rate constant, k, for a reaction at 53.0 c that has an activation energy of 81.0 kj/mol and a frequency factor of 6.02 x 10^11 s-1
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