# What is the positional entropy at absolute zero for two moles

Get college assignment help at uniessay writers What is the positional entropy at absolute zero for two moles of CF3Cl? 1. 23 J/K 2. 5.7 J/K 3. 8.3 J/K 4. 11.5 J/K 5. 0 J/K

## Consider the following specific heats: cop- per, 0.384 J/g· ◦C; lead,

Consider the following specific heats: cop- per, 0.384 J/g· ◦C; lead, 0.159 J/g· ◦C; water, 4.18 J/g· ◦C; glass, 0.502 J/g· ◦C. If the same amount of heat is added to identical masses of each of these substances, which substance at- tains the highest temperature? (Assume that they all have the same initial temperature.)

## Pentane C5H12 is a component of gasoline that burns according to

Pentane C5H12 is a component of gasoline that burns according to the following balanced equation: {rm{C}}_5 {rm{H}}_{12} (l); ;8;{rm{O}}_2 (g); rightarrow ;5{rm{ CO}}_2 (g); ;6{rm{ H}}_2 {rm{O(}}g) Calculate Delta H_{rm{rxn}}^circ for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of liquid pentane is -146.8 {{rm{kJ}}}/{{rm{mol}}} .) Express your answer using five significant figures.

## lewis dot structure for ch3ccch3

lewis dot structure for ch3ccch3

## The specific heat of liquid water is 4.18 J/°C·g and the

The specific heat of liquid water is 4.18 J/°C·g and the specific heat of carbon is 0.71 J/°C·g. A 10 gram sample of water and a 10 gram sample of carbon are each subjected to 155 J of heat. If both samples started at 25°C, which substance will have the higher final temperature, and by what magnitude?

## The dipole moment (mu) of HBr (a polar covalent molecule) is

The dipole moment (mu) of HBr (a polar covalent molecule) is 0.82 D (debye), and its percent ionic character is 12.1%. Estimate the bond length of the HBr bond in picometers.

## What is the percent yield of the reaction if 28.3 g

What is the percent yield of the reaction if 28.3 g of phosphorus triiodide PI3 is obtained when 68.0 g of I2 and 68.0 g of P are mixed and allowed to react?

## (A) lead(II)nitrate and ammonium carbonate solutions are combined. (b)zinc chloride solution

(A) lead(II)nitrate and ammonium carbonate solutions are combined. (b)zinc chloride solution is poured into a solution of magnesium sulfate.(C)Ammonium chloride and nickle(ii)nitrate solutions are combined. (D)Magnesium chloride solution is mixed with lithium phosphate solution.

## Ethylene glycol, C2H6O2, is widely used as an automotive antifreeze. What

Ethylene glycol, C2H6O2, is widely used as an automotive antifreeze. What is the minimum weight, in grams, of this compound that must be added to 10 kg of water to produce a solution that will protect an automobile cooling system from freezing at -20 ºC? Ethylene glycol is a non–electrolyte. Kf for water is 1.86 ºC/m.

## Identify any incorrect formulas. explain your answer. a. Mg2(SO4)3 b. Rb3As

Identify any incorrect formulas. explain your answer. a. Mg2(SO4)3 b. Rb3As c. BeCl3 d. NaF

## CH3CH2CH2COOH intermolecular forces

Get college assignment help at uniessay writers CH3CH2CH2COOH intermolecular forces

## A chemist wants to prepare 0.21 M HClO4, from a stock

A chemist wants to prepare 0.21 M HClO4, from a stock solution of HClO4 that is 12.1 M. How many milliters of the stock solution are required to make up 500 mL of 0.21 M HClO4

## 2PbO2 = 2PbO O2 How many liters of oxygen are

2PbO2 = 2PbO O2 How many liters of oxygen are formed if 478 g of PbO2 are reacted?

## How many kilocalories are absorbed by melting 1 mol of ice?

How many kilocalories are absorbed by melting 1 mol of ice?

## What is the mass of water, H2O(l), produced when 5.80 g

What is the mass of water, H2O(l), produced when 5.80 g of O2(g) reacts with excess H2(g)?

## At 0°C a 1.00 L flask contains 6.90 10-2 mol N2,

At 0°C a 1.00 L flask contains 6.90 10-2 mol N2, 4.40 102 mg O2, and NO at a concentration of 9.00 1018 molecules/cm3. What is the partial pressure of each gas, and what is the total pressure in the flask?

## The energy of activation for a particular first order chemical reaction

The energy of activation for a particular first order chemical reaction (A->B) is 60 kJ. The energy of activation for the same reaction, catalyzed by an enzyme is 44 kJ. The reaction remains first order with respect to the substrate when the reaction is enzyme catalyzed. The Km is 0.1 mM. The reactions are examined at 25 C.

## What is the final volume of a balloon that was initially

What is the final volume of a balloon that was initially 500.0 mL at 25°C and was then heated to 50°C ?

## How would you make a 100 mL solution with 41.40 mg/L

How would you make a 100 mL solution with 41.40 mg/L of Sodium Salicyclate, .020 M in FeCl3, and .050 M in HCl? These all have to be in one same 100 mL solution together. So in one container.

## The density of a glycerol/water solution that is 40% glycerol by

The density of a glycerol/water solution that is 40% glycerol by mass is 1.101 g/mL at 20 C. Calculate the molality of glycerol in the solution at 20 C.

## Use the Boltzmann formula to calculate the entropy at T =

Use the Boltzmann formula to calculate the entropy at T = 0 of 1.00 mol chlorobenzene(C6H5Cl) where each molecule can be oriented in any of six ways. 1. 30 J · K^−1 2. − 15 J · K^−1 3. − 30 J · K^−1 4. 0 J · K^−1 (at T = 0, there is no randomness). 5. 15 J · K^−1

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