03/12/21

Why does the calorimeter constant have to be included in any calculations involving heat measurement?
Why does the calorimeter constant have to be included in any calculations involving heat measurement?
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03/12/21

Isopropyl alcohol is mixed with water to produce a solution that is 36.0% alcohol by volume. How many milliliters of each component are present in 695 mL of this solution?
Isopropyl alcohol is mixed with water to produce a solution that is  alcohol by volume.How many milliliters of each component are present in  of this solution?
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03/12/21

For the reaction 2 A + 4 B → 2 C + 4 D, what is the absolute magnitude of the rate of change for [B] when [C] is increasing at 3.2 M/s?
This is for General Chemistry 2.
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03/12/21

Consider the titration of 50.0 mL of 0.315 M weak base B (Kb = 7.5 x 10⁻⁶) with 0.340 M HNO₃. What is the pH of the solution after the addition of 30.0 mL of HNO₃?
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03/12/21

What is the solubility of Mg(OH)₂ at a pH of 12.10? (Ksp Mg(OH)₂ is 1.6 × 10⁻¹³)
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03/12/21

Predict the sign of ΔS° for each of the following reactions.
a) CCl4(l) + 5O2(g) --> CO2(g) + 4ClO2(g)b) 8H2O(l) + S8(s) --> 8H2S(g) + 4O2(g)c) Br2(l) --> Br2(s) d) 2NH3(g) --> N2(g) + 3H2(g)
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03/12/21

Equilibrium concentrations

The equilibrium constant, Kc, for the following reaction is 55.6 at 698 K.H2 (g) + I2 (g)  2 HI (g)Calculate the equilibrium concentrations of reactants and product when 0.333 moles... more
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03/12/21

What volume of butane (C4H10) is required to produce 42.1 liters of water according to the following reaction?

(All gases are at the same temperature and pressure.)butane (C4H10) (g) + oxygen(g)carbon dioxide (g) + water(g)
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03/12/21

If you start off with 130.0g of NaN3, how many grams of N2 would you make

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03/12/21

college chemistry 1
Use dimensional analysis (e.g. percent composition) to convert 0.156 grams of phosphorus to grams of P2O5. (3 sig figs)
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03/12/21

Calculate K for Rearranged Equation
The equilibrium constant, Kc, for the following reaction is 20.1 at 318 K.2CH2Cl2(g) CH4(g) + CCl4(g)Calculate Kc at this temperature for the following reaction:CH2Cl2(g) 1/2CH4(g) + 1/2CCl4(g)Kc = 
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03/12/21

Calculate K for Rearranged Equation
The equilibrium constant, Kc, for the following reaction is 5.56×10-2 at 541 K.PCl5(g) PCl3(g) + Cl2(g)Calculate Kc at this temperature for:PCl3(g) + Cl2(g) PCl5(g)Kc = 
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03/12/21

Kp and Equilibrium Pressures
The equilibrium constant, Kp, for the following reaction is 0.160 at 298K.2NOBr(g) 2NO(g) + Br2(g)If an equilibrium mixture of the three gases in a 11.8 L container at 298K contains NOBr at a... more
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03/12/21

Calculate K from Initial + One Final Concentration
A student ran the following reaction in the laboratory at 447 K:PCl5(g) PCl3(g) + Cl2(g)When she introduced 1.38 moles of PCl5(g) into a 1.00 liter container, she found the equilibrium... more
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03/12/21

A compound is composed of 51.6% Z, 38.7% X, and 9.62% Y. Show all your work.

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03/12/21

Calculate ΔG° at 45°C for reactions for which
(a) ΔH° = 293 kJ; Delta S° = -695 J/K (b) ΔH° = -1137 kJ; Delta S°=0.496 kJ/K(c) ΔH° = -86.6 kJ; Delta S° = -382 J/K
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03/11/21

How many moles of CF4 are there in 171g of CF4?
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03/11/21

(Entropy, ΔS°) Predict the sign of ΔS for the following.
a) a lake freezingb) precipitating lead chloridec) a candle burningd) weeding a garden
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03/11/21

Chemistry help please? Calculate the enthalpy change for the reaction: C6H4(OH)2(aq) + H2O2(aq) <—>C6H4O2(aq) + 2H2O(l)?
Calculate the enthalpy change for the reaction: C6H4(OH)2(aq) + H2O2(aq) <—> C6H4O2(aq) + 2H2O(l)given the following data:C6H4(OH)2(aq)-->C6H4O2(aq)+H2(g) H= +174.4 kJH2O(g)-->H2O(l) H=... more
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03/11/21

Find equilibrium concentrations total pressure Please Help
The reaction CO2(g)+C(s) reverse arrows 2CO(g)has kp=5.78at 1200K. Calculate the total pressure at equilibrium when 4.96g of CO2 is introduced into a 10.0 L container and heated to 1200 K in the... more
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03/10/21

For the reaction CO(g) + 2 H2(g) ⇌ CH3OH(g) at 700. K, equilibrium concentrations are [H2] = 0.072 M, [CO] = 0.020 M, and [CH3OH] = 0.030 M. Calculate K.

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03/10/21

Calculate the standard enthalpy change for the following reaction.
CO(g) + Cl2(g)COCl2(g)
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03/10/21

What is the specific heat of chromium calculated from her data?
In the laboratory a student finds that it takes 98.4 Joules to increase the temperature of 13.6 grams of solid chromium from 21.2 to 38.3 degrees Celsius.
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03/10/21

Equilibrium calculations
The equilibrium constant, Kc, for the following reaction is 83.3 at 500 K.PCl3(g) + Cl2(g) PCl5(g)Calculate the equilibrium concentrations of reactant and products when 0.282 moles... more
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03/10/21

Calculating K from Rearranged equations
The equilibrium constant, Kc, for the following reaction is 1.95×10-2 at 731 K.2HI(g) H2(g) + I2(g)Calculate Kc at this temperature for the following reaction:HI(g) 1/2H2(g) + 1/2I2(g)Kc = 
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