General Chemistry Answers

14.Calculate the energy required to remove the electron from a hydrogen atom in itsground state.

When 0.344 mol of HCl is combined with enough water to make a 450.0 mL solution, the concentration of HCl is ________ M.

Question 8 options:

1) 

7.64 × 10^-4

2) 

0.155

3) 

1.31

4) 

0.764

5) 

0.344

Write a balanced equation for the overall cell reaction and calculate the standard cell potential, E^0cell.

A. Half-reactions: Cd^2+(aq) + 2e^- —> Cd(s) Cr^2+(aq) + 2e^- —> Cr(s)

Cell reaction:

E^0 cell

B. Half-reactions: Fe^2+(aq) + 2e^- —> Fe(s) Br2(g) + 2e^- —> 2Br^-(aq)

Cell reaction:

E^0cell

Write the correct name for each of the following structures.

CH3CH2CH = CHCH2CH2CH = CH2

CH3CH2C = CCH2CH3

Which of the following cells will produce the highest voltage? SHOW YOUR WORK.

a. Mn I Mn^2+ II Zn^2+ I Zn

b. Zn I Zn^2+ II Ni^2+ I Ni

c. Ni I Ni^2+ II Cu^2+ I Cu

Solve separately then write which one will produce the highest voltage.

How would you prepare 400 ml of a 0.24 M NaCl solution (MW = 58.44 g/mole) 

How many milliliters from a 6.00 M H2SO4 solution would need in order to prepare 50 mL of 2.00 M H2SO4?  

A 12.3 cm piece of copper tube has a mass of 36.50 g. What is the length of tube if it has a mass of 110 kg?

Determine whether the following reactions will occur by determining the voltage produced. (3 marks each)

a. Ag(s) + HCl(aq) 

b. Mg(s) + FeSO4(aq) 

3. The most common method of producing bromine involves oxidizing bromine ions (Br- ) to bromine liquid (Br2) using chlorine gas (Cl2). What is the E for this reaction? 2 marks

1. By what mass (in grams) will a chromium cathode increase when it is coupled to a magnesium half-cell in which the magnesium anode loses 1.53 grams? (assuming chromium ions in solution are Cr3+).