Post on 06-Mar-2016
description
transcript
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 1/47
1. Who is said to be the founderof the scientic method?
C. Galileo Galilei
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 2/47
2. In the universe, it is anythingthat occupies space and hasmass.
. !atter
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 3/47
". #lectron came from the gree$%ord&
C. mber
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 4/47
'. Which of the follo%ing fallsunder (uids?
). both a * c.
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 5/47
+. he state of matter %hichoccupies the %hole spaceavailable is
. gas
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 6/47
-. It is a property of matter%hich can be measured bychanging the identity andcomposition of a substance.
. Chemical
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 7/47
. Which of the follo%ing is notan e/tensive property?
C. 0oiling point
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 8/47
. What do you call chemicallyidentical atoms of the sameelement but %ith dierentnumbers of neutrons anddierent mass numbers.
C. Isotopes
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 9/47
3. ritium has
C. 1 proton and 2 neutron
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 10/47
14. What is the most abundantelement in the universe?
0. hydrogen
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 11/47
11. What is the most abundant
element in the #arth5satmosphere?
. nitrogen
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 12/47
12. he net electrical charge ofan atom under normal state is&
C. neutral
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 13/47
1". substance that cannot bedecomposed into simplersubstances by ordinarychemical reactions
C. #lement
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 14/47
1'. he subdivision of anelement that can ta$e part in achemical reaction
). tom
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 15/47
1+. he sub6atomic partconsisting of neutrons andprotons is $no%n as
0. 7ucleons
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 16/47
1-. he no. of protons in the
nucleus on an atom. tomic number
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 17/47
1. he no. of protons andneutrons in the nucleus of anatom
0. !ass number
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 18/47
1. 1 amu is appro/imatelye8ual to
). 1.-- / 14 9 62 $g
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 19/47
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 20/47
24. What do you call theelectrons in the outermostorbitals?
. :alence electrons
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 21/47
21. Calculate the mass of theproduct of reaction of -.+' g of;inc %ith ".21 g of sulfur.
C. 3.+ g
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 22/47
22. Calculate the mass of theo/ygen that reacts %ith 1.2' gof methane <natural gas= toform ".'1 g of carbon dio/ideand 2.3 g of %ater.
). '.3- g
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 23/47
2". Calculate the atomic mass ofan element if -4.'> of theatoms have a mass of -.32+amu and the rest have a massof 4.32'3 amu.
0. -3. amu
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 24/47
ractice roblem&
Calculate the percentage of bromineatoms that have a mass of .31"amu and the percentage that have
a mass of 4.31-" amu. heatomic mass of bromine is 3.343amu, and theses are the only t%o
naturally occurring isotopes.C. +4.'>, '3.->
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 25/47
2+. Calculate the formula massof <7@'=2@A' <one type of
fertili;er=.
0. 1"2 amu
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 26/47
2-. Calculate the number of
moles of l atoms in +.+ /142' l atoms.
0. 3.++ mol l atoms
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 27/47
2. Calculate the number of
moles of @2 molecules in +.+ /142' @2 molecules.
0. 3.++ mol @2 molecules
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 28/47
2. Calculate the number of
molecules in "4 g 7@".
. 1.4- / 142' molecules
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 29/47
23. In a +.446g sample of carbon,
ho% many of the atoms have amass of 12.41 amu?
. 7one
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 30/47
"4. Calculate the empirical
formula of Bhypo, used inphotographic development,consisting of 23.1> 7a, '4.+>
D, and "4.'> A.). 7a2D2A"
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 31/47
"1. Calculate the molecular
formula of a compound %ithmolar mass 14' gEmolcomposed of 32."> carbon and
.> hydrogen.
. C1@1
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 32/47
"2. he reaction 7a2A F @2A
27aA@ illustrates a
. Dynthesis eaction
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 33/47
"". he reaction 0a<A@=2 F
2CuC7D 0a<C7D=2 F 2CuA@is an e/ample of
0. !etathesis eaction
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 34/47
"'. he decomposition of a
given compound can be carriedout
). either by passing electriccurrent or heating
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 35/47
"+. Calculate the molarity of a
2+46mH solution containing4.4 mmol of solute.
0. 4."24 !
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 36/47
"-. Calculate the number of
moles of solute re8uired toma$e +4.44 mH of 1.+44 !solution
C. 4.4+ mol
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 37/47
". Calculate the molarity of a
solution after 1.4 H of 2.4- !solution is diluted to 2.+4 H.
). 1.'4 !
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 38/47
". Calculate the mole fraction of a
solution of 4.41+ mol of 7aCl in+4.4 g of %ater if the solution has adensity of 1.42 gEmH.
. 4.44+"-
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 39/47
"3. Calculate the molality of an
alcohol in a8ueous solution ifthe mole fraction of the alcoholis 4.1+4.
C. 3.4 m alcohol
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 40/47
'4. 0attery acid is the common
name for
). sulfuric acid
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 41/47
'1. When one element causes
the o/idation of anotherelement, it is
C. reduced
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 42/47
'2. ccording to the 0ronsted
heory, an acid is
. a proton donor
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 43/47
'". he p@ of an acid solution is
. "
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 44/47
''. he p@ of a solution %ith a
hydrogen ion concentration of1 / 14" is
. F"
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 45/47
'+. he p@ concentration of a
solution that has a hydro/ideion concentration of 1 / 146' molEH is
C. 14
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 46/47
'-. 146- ! @Cl solution is
diluted to 144 times. he p@ ofthe diluted solution %ould be
. bet%een - to
7/21/2019 Chemistry Oct2011
http://slidepdf.com/reader/full/chemistry-oct2011-56db60e781b1d 47/47
'. substance %hich can act
both an acid and a base is&
0. amphoteric