196 Answered Questions for the topic College Chemistry

From the data below, calculate the total heat (in J) needed to convert 0.816 mol of gaseous ethanol at 300.0°C and 1 atm to liquid ethanol at 25.0°C and 1 atm:

b.p. at 78.d degrees Ccgas: 1.43 J/g. degrees CDelta Hvap: 40.5 kJ/molcliquid: 2.45 J/g. degrees C

Sulfur dioxide is produced in enormous amounts for sulfuric acid production. It melts at −73.0°C and boils at −10.0°C....

Its DeltaH fus is 8.619 kJ/mol, and its DeltaH vap is 25.73 kJ/mol. The specific heat capacities of the liquid and gas are 0.995 J/g.K and 0.622 J/g.K, respectively. How much heat is required to... more
College Chemistry Chemistry

28d

How to solve what the molarity is?

College Chemistry Chemistry

28d

How do you solve, and do the work for this problem?

04/01/21

What type of reaction is this?

Al(s) + 3Ag(NO3)2(aq) ===> Al(NO3)2(aq) + 3Ag(s)Double displacement?

03/30/21

CHEMISTRY LIMITING REACTANT

The following data was collected when a reaction was performed experimentally in the laboratory. Reactants Products Al(NO3)3 NaCl NaNO3 AlCl3 Starting Amount in Reaction 4 moles 9... more

03/23/21

From the partial (valence-level) orbital diagram, write the ground-state electron configuration and group number.

5p __ __ __ (no arrows)4d __ __ __ __ __ (four up arrows)5s __ (one up arrow)

03/22/21

Write the symbol of the element from which this ion is derived and Write the formula of the oxide this ion forms.

The partial (valence-level) orbital diagram for a 3+ ion is: (3+ ion) 4s 3d 

03/22/21

What is the full ground-state electron configuration of the monatomic ion most likely to be formed by Br?

I got 1s22s22p63s23p63d104s24p6 but it is incorrect.

03/22/21

Choose all possible values of each quantum number for the outermost electron in an S2− ion.

I got 3 for n and 1 for l but how do I find the possible values for ml and ms?

03/20/21

Write the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by P.

Charge: -3And I got 1s22s22p63s23p3 for the ground-state electron configuration, but it is incorrect. What does ground state configuration mean?

03/20/21

Write the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by P.

Charge: -3And I got 1s22s22p63s23p3 for the ground-state electron configuration, but it is incorrect. What does ground state configuration mean?

03/20/21

This chemical reaction is a two-step reaction. What type of reaction occurs in each step? How did you determine your answer?

The products of step 1 are sodium acetate and carbonic acid. Step 2, which occurs immediately after step 1, produces carbon dioxide and water.The balanced chemical equations are:NaHCO3(s)... more

03/10/21

For n = 3 and l = 2, give the sublevel designation, the allowable ml values, and the number of orbitals.

Sublevel designation:s, p, d, or f?Allowable ml values:0-1, 0, +1-2, -1, 0, +1, +2Or-3, -2, -1, 0, +1, +2, +3Number of orbitals:

03/05/21

I keep getting this wrong. In a collision of sufficient force, automobile air bags respond by electrically triggering the explosive decomposition of sodium azide (NaN3) to its elements....

A 33.4−g sample of sodium azide was decomposed, and the nitrogen gas generated was collected over water at 26°C. The total pressure was 757.0 mmHg. How many liters of dry N2 were generated? Do not... more

03/05/21

When 28.2 mL of 0.500 M H2SO4 is added to 28.2 mL of 1.00 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ΔH of this reaction...

(Assume that the total volume is the sum of the individual volumes and that the density and specific heat capacity of the solution are the same as for pure water.) (d for water = 1.00 g/mL; c for... more

03/03/21

Oxidation of gaseous ClF by F2 yields liquid ClF3, an important fluorinating agent. Use the following thermochemical equations to calculate...

ΔH0rnx for the production of CIF3:(1) 2 CIF(g) + O2(g) ---> Cl2O(g) + OF2(g) ΔH0 = 167. 5 kJ(2) 2 F2(g) + O2(g) ---> 2 OF2(g) ΔH0 = -43.5 kJ(3) 2 CIF3(l) + 2 O2(g) ---> Cl2O(g) + 3... more

03/02/21

When 1 mol of CS2(l) forms from its elements at 1 atm and 25°C, 89.7 kJ is absorbed, and it takes 27.7 kJ to vaporize 1 mol of the liquid. How much heat is absorbed when 1 mol of CS2(g) forms from...

its elements at these conditions? Do not answer in scientific notation.I got 1174 kJ but it is wrong.

03/02/21

This one I am stuck....High-purity benzoic acid (C6H5COOH; ΔHrxn for combustion = −3227 kJ/mol) is used as a standard for calibrating bomb calorimeters. A 1.221-g sample burns in a calorimeter...

(heat capacity = 1365 J/°C) that contains exactly 1.370 kg of water. What temperature change is observed?My steps:-qreaction = - (1.221g HBZ) X 1 mol HBZ over 1221.2g HBZ X -3227 kJ over 1 mol HBZ... more

03/02/21

Copper(I) oxide can be oxidized to copper(II) oxide: Cu2O(s) + 1/2 O2(g) → 2 CuO(s).....

ΔH0rxn = -146.0 kJGiven ΔH0f of Cu2O(s) = −168.6 kJ/mol, find ΔH0f of CuO(s)

03/02/21

Sucrose (C12H22O11, table sugar) is oxidized in the body by O2 via a complex set of reactions that ultimately produces CO2(g) and H2O(l) and releases 5.16 × 103 kJ of heat per mole of sucrose...

(a) Write a balanced thermochemical equation for this reaction. Include the physical state of each reactant and product.Enter your answer for ΔHrxn in scientific notation.(b) Calculate the energy... more

03/02/21

I am pretty sure I did this completely wrong. When 25.8 mL of 0.500 M H2SO4 is added to 25.8 mL of 1.00 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ΔH...

of this reaction. (Assume that the total volume is the sum of the individual volumes and that the density and specific heat capacity of the solution are the same as for pure water.) (d for water =... more

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