Project #13614 - chemistry

 

CHM1033 Homework Fall 2013

 

 

 

Match the following regarding states of matter and their changes. Not all will be used.

 

a.

sublimation

h.

evaporation

b.

boiling

i.

gas

c.

deposition

j.

element

d.

solid

k.

mixture

e.

liquid

l.

compound

f.

condensation

m.

energy

g.

freezing

n.

density

 

 

 

 

 

____    1.   A light fog (water droplets) forms when the air cools after sunset

 

 

 

____    2.   blood is this type of matter

 

 

 

____    3.   loss of liquid water from the surface as water vapor

 

 

 

____    4.   a pure substance made of different types of atoms bound by chemical bonds

 

 

 

____    5.   amount of mass per unit volume (g/ml)

 

 

 

____    6.   Dry ice (frozen CO2) transforms directly into a gas

 

 

 

____    7.   a rain storm becomes an ice storm as the temperature drops

 

 

 

____    8.   required to do work. Units are calories or joules

 

 

 

____    9.   pure substance with all the same atoms

 

Match the following regarding matter, atoms, elements and periodic table. Not all will be used

 

a.

protons

f.

group

b.

electrons

g.

period

c.

neutrons

h.

atomic number

d.

protons and neutrons

i.

atomic mass

e.

protons and electrons

j.

valence electrons

 

 

 

 

 

____  10.   moving down these horizontal rows, electrons get put in higher energy levels

 

 

 

____  11.   protons and neutrons contribute most to this aspect of an element

 

 

 

____  12.   indicates number of protons (and electrons) of an element

 

 

 

____  13.   the outer shell electrons used to make electron dot structures

 

 

 

____  14.   elements with the same ____ number in the periodic table have similar properties and same number of valence electrons

 

 

 

____  15.   negative charged particles

 

 

 

Choose the formulas below that best fit the descriptions. Not all formulas will be used.

 

a.

Mg3N2

g.

Mg2N3

b.

Na2S

h.

NaS2

c.

Na(SO4)

i.

Na2(SO4)       

d.

SiF4

j.

Si3F4

e.

NH3

k.

N2

f.

CO

l.

CO2

 

 

 

 

 

____  16.   carbon dioxide                         ____    19.       sodium sulfide

 

 

 

 

 

____  17.   magnesium nitride                   ____    20.       silicon tetrafluoride

 

 

 

 

 

____  18.   nitrogen

 

 

 

Match the descriptions with the best equations below. Not all equations will be used

 

a.

Pb(NO3)(aq) +  2NaCl(aq) --> PbCl2(s) + 2NaNO3(aq)

b.

KClO3 --> 2 KCl + 3 O2

c.

O2 + 2H2O --> 2H2O2

d.

2Na  +  2H2O -->   2NaOH  +  H2

e.

H2 --> 2 H+ + 2 e-

f.

F2 --> 2 F- + 2 e-

g.

H2 + 2 e- --> 2 H+

h.

F2 + 2 e- --> 2 F-

 

 

 

 

 

____  21.   The oxidation half reaction for: H2 + F2 --> 2 HF                    ____    24.       single displacement reaction

 

 

 

 

 

____  22.   The reduction half reaction for: H2 + F2 --> 2 HF                    ____    25.       double displacement reaction

 

 

 

 

 

____  23.   decomposition reaction

 

 

 

Multiple Choice

 

Identify the choice that best completes the statement or answers the question.

 

 

 

____  26.   In a solution of a solid in a liquid, the liquid is called which of the following?

 

a.

concentrate

b.

dissolver

c.

solute

d.

solvent

 

 

 

 

 

____  27.   Water is likely to be a poor solvent for which types of molecules?

 

a.

molecules which can form hydrogen bonds

b.

nonpolar molecules

c.

polar molecules

d.

none, water is considered a universal solvent

 

 

 

 

 

____  28.   Which of the following happens when NaCl dissolves in water?

 

a.

the chloride ions are attracted to the positive end of the water dipole

b.

the sodium ions are attracted to the negative end of the water dipole

c.

both (a) and (b)

d.

neither (a) nor (b)

 

 

 

 

 

____  29.   Which of the following is true of glucose, C6H12O6, when it dissolves in water?

 

a.

it dissociates into ions

b.

it forms covalent bonds with water

c.

it forms hydrogen bonds with water

d.

none of the above, glucose does not dissolve in water

 

 

 

 

 

____  30.   Which of the following is true of effective collisions?

 

a.

the number of effective collisions determines the reaction rate

b.

the number of effective collisions increases as the temperature is increased

c.

both (a) and (b)

d.

neither (a) nor (b)

 

 

 

 

 

____  31.   For the reaction PCl3(g) + Cl2(g)  PCl5(g) which of the following is true once the reaction has reached equilibrium?

 

a.

the concentration of PCl3 is zero

b.

the concentration of PCl3 remains constant

c.

the concentrations of PCl3 and Cl2 are always equal

d.

none of the above

 

 

 

 

 

____  32.   When hydrogen chloride gas is dissolved in water which of the following species is not present in the solution?

 

a.

HCl(aq)

c.

Cl-(aq)

b.

H2O(l)

d.

none, they are all present

 

 

 

 

 

____  33.   Which of the following is true of pH?

 

a.

it can be used to determine the chemical identity of an acid

b.

it is a measure of acid concentration

c.

it is a measure of acid strength

d.

it is a measure of the overall acidity

 

 

 

 

 

____  34.   Which of the following will determine the pH of a buffer made using acetic acid and sodium acetate?

 

a.

the amount of water present

c.

the [HC2H3O2]

b.

the [C2H3O2-]

d.

the ratio [C2H3O2-]/[HC2H3O2]

 

 

 

 

 

 

 

Problems

 

 

 

          35.   If a solution is prepared by dissolving 3.4 g of lithium iodide, LiI, in enough water to make 200 mL of solution, what is the %(w/v) of LiI?Show your work to get all points!!!!

 

 

 

 

 

 

 

              

 

          36.   (3 pts) 12.00 g of ethanol (Density = 0.78900 g/ml) is measured in a graduated cylinder. A) What is the volume in ml? B) Now provide the volume in L. Show work with units crossing out and provide correct number of significant figures.

 

           

 

 

 

 

 

 

 

          37.   A certain wine contains 0.0300 M NaHSO3 as a preservative. What weight of NaHSO3 is in a 750 mL bottle of this wine? Show your work to get all points!!!

 

 

 

 

 

 

 

          38.   (4 pts) O2 can be produced by the reaction 2KClO3(s)  2KCl(s) + 3O2(g). In one experiment 1.624 g of O2 were formed. How much KCl (in grams) was produced? Work or no points

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

x

 

 

 

          39.   (5 pts) Diethyl ether can be made from ethanol. The reaction is

 

     2C2H5OH(l)  (C2H5)2O(l) + H2O(l)

 

 

 

In one experiment 56.0 g of ethanol yielded 44.7 g of diethyl ether. What was the percent yield in this experiment? Show your work or no credit!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

          40.   For the reaction 2NOCl(g)  2NO(g) + Cl2(g) at 25°C equilibrium is established when [NOCl] = 2.6 M, [NO] = 1.4 M and [Cl2] = 0.34 M. What is the equilibrium constant for this reaction? Show your work to get all points!!!!

 

 

 

 

 

 

 

          41.   For the reaction 2NOCl(g)  2NO(g) + Cl2(g) at 25°C equilibrium is established when [NOCl] = 2.6 M, [NO] = 1.4 M and [Cl2] = 0.34 M. What is the equilibrium constant for this reaction? Show your work to get all points!!!!

 

 

 

 

 

 

 

          42.   An HCl solution has a [H+]of 4.0 ´ 10-4 M. What is its pH?Show work for all points!!!!

 

 

 

 

 

 

 

          43.   Balance these equations (10 pts):

 

a.   H2 +  N2 -->  NH3

 

b.   Al2O3 +   Al -->  O2

 

c.   C2H6 +  O2 -->  CO2 +  H2O

 

 

 

          44.  

 

Fill in the table below:

 

Element

Name

Atomic number

# of Protons/ electrons

relative atomic mass

Period

Group

Rb

 

 

 

 

 

 

Rh

 

 

 

 

 

 

Cl

 

 

 

 

 

 

Cd

 

 

 

 

 

 

Os

 

 

 

 

 

 

Na

 

 

 

 

 

 

F

 

 

 

 

 

 

In

 

 

 

 

 

 

Co

 

 

 

 

 

 

Ni

 

 

 

 

 

 

Fe

 

 

 

 

 

 

 

Subject Science
Due By (Pacific Time) 10/02/2013 06:00 pm
Report DMCA
TutorRating
pallavi

Chat Now!

out of 1971 reviews
More..
amosmm

Chat Now!

out of 766 reviews
More..
PhyzKyd

Chat Now!

out of 1164 reviews
More..
rajdeep77

Chat Now!

out of 721 reviews
More..
sctys

Chat Now!

out of 1600 reviews
More..
sharadgreen

Chat Now!

out of 770 reviews
More..
topnotcher

Chat Now!

out of 766 reviews
More..
XXXIAO

Chat Now!

out of 680 reviews
More..
All Rights Reserved. Copyright by AceMyHW.com - Copyright Policy