General Chemistry Answers

1) As a group, place each cotton ball in each beaker of equal amount of propanol, acetone (propanone), and water. Squeeze to remove excess liquid. 2) Wipe or dab the cotton balls in the appropriate box on the loose paper at the same time. 3) Observe the rate of evaporation for each liquid. 4) Record your observations here.

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?