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Get college assignment help at uniessay writers A calorimeter contains 27.0 mL of water at 14.0, ^{circ}C. When 1.40 g of rm X (a substance with a molar mass of 67.0 g/mol) is added, it dissolves via the reaction rm X{(s)} H_2O{(l)} rightarrow X{(aq)} and the temperature of the solution increases to 28.0, ^{circ}C. Calculate the enthalpy change, Delta H, for this reaction per mole of rm X. Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 rm J/(g cdot {^circ C}) and 1.00 rm g/mL] and that no heat is lost to the calorimeter itself, nor to the surroundings.

Complete combustion of 5.00 g of butane releases 248 kJ of

Complete combustion of 5.00 g of butane releases 248 kJ of heat. A. Calculate the molar enthalpy of combustion of butane ,that is, the heat released when one mole of butane is burned

A cucumber is placed in a concentrated salt solution. What will

A cucumber is placed in a concentrated salt solution. What will most likely happen? (show all works) A) Water will flow from the solution to the cucumber. B) Salt will precipitate out. C) No change will occur. D) Water will flow from the cucumber to the solution. E) Salt will flow into the cucumber.

The following data were obtained for the reaction of NO with

The following data were obtained for the reaction of NO with O2. Concentrations are in molecules/cm^3 and rates are in molecules/cm^3 * s. __[NO]0_______[O2]0______Initial Rate 1 * 10^18___1 * 10^18____2.0 * 10^16 2 * 10^18___1 * 10^18____8.0 * 10^16 3 * 10^18___1 * 10^18____18.0 * 10^16 1 * 10^18___2 * 10^18____4.0 * 10^16 1 * 10^18___3 * 10^18____6.0 * 10^16 A) Rate = k[NO]^2[O2]^2 B) Rate = k[NO][O2] C) Rate = k[NO]^2[O2] D) Rate = k[NO]^2 E) Rate = k[NO][O2]^2

Consider the following data concerning the equation: H2O2 3I-

Consider the following data concerning the equation: H2O2 3I- 2H → I3- 2H2O ___[H2O2]__________[I-]___________[H ]___________ rate I 0.100 M___5.00 x 10^-4 M___1.00 x 10^-2 M___0.137 M/sec II. 0.100 M___1.00 x 10^-3 M___1.00 x 10^-2 M___0.268 M/sec III. 0.200 M___1.00 x 10^-3 M___1.00 x 10^-2 M___0.542 M/sec IV. 0.400 M___1.00 x 10^-3 M___2.00 x 10^-2 M___1.084 M/sec’ 20. The average value for the rate constant k (without units) is A) 137 B) 2710 C) 2.74 x 10^4 D) 108 E) none of these show all works

A galvanic cell below, whose cell potential E is strongly pH

A galvanic cell below, whose cell potential E is strongly pH dependent (the contents of each half cell are written below). The standard reduction potentials are: MnO4- 8 H 5 e – → Mn 2 4 H2O Eº= 1.51 V Au 3 3 e- → Au(s) Eº= 1.42 V If the cell is run at a temperature of 25ºC, calculate the pH value at which the cell potential E is 0. 0.36 M MnO 4 – 0.004 M Au 3 0.001 M Mn 2

if 6.73 g of Na2CO3 is dissolved in enough water to

if 6.73 g of Na2CO3 is dissolved in enough water to make 250 ml of solution, what is the molarity of the sodiam carbonate?

MgNH4PO4 6H2O loses H20 stepwise as it is heated. Between 40c

MgNH4PO4 6H2O loses H20 stepwise as it is heated. Between 40c and 60c the monohydrate is formed and above 100c the anhydrous material is formed. What are the phosphorus percentages of the monohydrate and of the anhydrous material?

what is the solubility of oxygen in water

what is the solubility of oxygen in water

Lewis dot structure of nitryl cation. NO2 .

Lewis dot structure of nitryl cation. NO2 .

what is the use of benzen diazonium chloride

Get college assignment help at uniessay writers what is the use of benzen diazonium chloride

If 18.4 of 0.800 solution are needed to neutralize 5.00 of

If 18.4 of 0.800 solution are needed to neutralize 5.00 of a household ammonia solution, what is the molar concentration of the ammonia?

how do i know which compounds violate the otect rule?

how do i know which compounds violate the otect rule?

A calorimeter contains 27.0 mL of water at 13.0, ^{circ}C. When

A calorimeter contains 27.0 mL of water at 13.0, ^{circ}C. When 1.30 g of rm X (a substance with a molar mass of 81.0 g/mol) is added, it dissolves via the reaction rm X{(s)} H_2O{(l)} rightarrow X{(aq)} and the temperature of the solution increases to 28.0, ^{circ}C. Calculate the enthalpy change, Delta H, for this reaction per mole of X. Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 J/g and 1.00 g/mL and that no heat is lost to the calorimeter itself, nor to the surroundings.

Calorimetry is a method used to measure changes in enthalpy, or

Calorimetry is a method used to measure changes in enthalpy, or heat, that occur during chemical processes. Two common calorimeters are constant-pressure calorimeters and constant-volume (or “bomb”) calorimeters. Bomb calorimeters are used to measure combustion and other gas-producing reactions, in which the reaction is observed in a strong, sealed vessel. A simple constant-pressure calorimeter can be made from a foam coffee cup and a thermometer, in which energy changes in a reaction are observed via the change in temperature of the solution in the cup. The idea behind calorimeters is that if they are sufficiently insulated from the outside environment, any energy gained or lost in the chemical reaction will be directly observable as a temperature and/or pressure change in the calorimeter. In the following experiment, a coffee-cup calorimeter containing 100ml of H2O is used. The initial temperature of the calorimeter is 23 degrees C. If 4.20g of CaCl2 is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The heat of solution of is deltaH(solution) of CaCl2 is -82.8 kj/mol

Suppose that 26 of each of the following substances is initially

Suppose that 26 of each of the following substances is initially at 27.0. What is the final temperature of each substance upon absorbing 2.45 of heat?

How many mole of sodium flouride -(24%) is in a tube

How many mole of sodium flouride -(24%) is in a tube of toothpaste that is 119g?

If 3.25 of vinegar needs 45.0 of 0.150 to reach the

If 3.25 of vinegar needs 45.0 of 0.150 to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.60 sample of this vinegar?

Na2So4 * XH20

Na2So4 * XH20

1 a) Show the mechanism that leads to the major organic

1 a) Show the mechanism that leads to the major organic product in the following reaction. Make sure to take any stereospecificity into account in your answer. (Only draw the appropriate electron flow arrows.) http://www.webassign.net/marvinimages/0/d/022460e59ccd2ba44befcd76ba1987.png b) The mechanism that leads to the major organic product is the ___________ mechanism. 1. E1 Elimination 2. E2 Elimination 3.free radical 4. electrophilic addition im guessin its either 1 or 2…?….. thanks ^^

Use average bond energies to calculate the energy released when 1

Use average bond energies to calculate the energy released when 1 mole of acetylene gas (ethyne, C2H2) reacts completely with O2(g) to form gaseous products. Use the information in the Table of Bond Enthalpies which is in the Chemistry Tables link to the left. C(triple-bond) = 835kJ/mol C-H = 413kJ/mol O-O = 146kJ/mol

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