8/18/2019 Final Exam in Chemistry 1

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FINAL EXAM IN CHEMISTRY 1

MULTIPLE CHOICE

DIRECTIONS: Select your answer from the four choces: letters !" #" C" D f there s none" wrte E$

%$ Chemcal formula of &arum sulfatea$ #aSO' &$ #a(SO' c$ #a)SO'*( +$ #a()SO'*,

($ -ormula we.ht n .rams of &arum sulfatea$ (,, &$ ,/0 c$ ,(1 +$ 23(

,$ 4 com5oston of &arum n &arum sulfatea$ %,$/, &$ 26$60 c$ (/$/2 +$%2$,(

'$ 4 com5oston of sulfur n &arum sulfatea$ %,$/, &$ 26$60 c$ (/$/2 +$%2$,(

2$ 4 com5oston of o7y.en n &arum sulfatea$ %,$/, &$ 26$60 c$ (/$/2 +$%2$,(

3$ No$ of .rams of &arum n '$3 moles of &arum sulfatea$ 0$%01 &$ '$%( c$ 2%( +$ 3,0$(

/$ No$ of .rams of sulfur n ,0 .rams of &arum sulfatea$ 0$%01 &$ '$%( c$ 2%( +$ 3,0$(

6$ No$ of .rams of o7y.en n 6 moles of &arum sulfatea$ 0$%01 &$ '$%( c$ 2%( +$ 3,0$(

1$ No$ of moles of &arum sulfate n %2 .rams of &arum

a$ 0$%01 &$ '$%( c$ 2%( +$ 3,0$(%0$ Chemcal formula of alumnum ferrcyan+e s

a$ !l-e)CN*3 &$ !l8-e)CN*39, c$ !l'-e)CN*3 +$ !l'8-e)CN*39,

%%$ No$ of atom)s* of alumnum n alumnum ferrcyan+ea$ % &$ ( c$, +$ '

%($ No$ of atom)s* of ron n alumnum ferrcyan+ea$ % &$ ( c$, +$ '

%,$ No$ of atom)s* of car&on n alumnum ferrcyan+ea$ % &$ ' c$3 +$ %6

%'$ No$ of atom)s* of ntro.en n alumnum ferrcyan+ea$ % &$ ' c$3 +$ %6

%2$ -ormula we.ht n .rams of alumnum ferrcyan+ea$ /'' &$ 33, c$ ,(0 +$ (,1

%3$ 4 com5oston of alumnum n alumnum ferrcyan+ea$ %%$,0 &$ ,0$%, c$ (,$', +$ ,2$%2

%/$ 4 com5oston of ron n alumnum ferrcyan+e

a$ %%$,0 &$ ,0$%, c$ (,$', +$ ,2$%2%6$ 4 com5oston of car&on n alumnum ferrcyan+ea$ %%$,0 &$ ,0$%, c$ (,$', +$ ,2$%2

%1$ 4 com5oston of ntro.en n alumnum ferrcyan+ea$ %%$,0 &$ ,0$%, c$ (,$', +$ ,2$%2

(0$ No$ of .ram)s* of o7y.en n 2$3moles of 5hos5horc ac+a$ ,26$' &$ 230 c$ 20' +$ ,,3

(%$ No$ of mole)s* o7y.en n 10 .rams of 5hos5horc ac+a$ ($3/ &$ '$3/ c$ ,$3/ +$ 2$3/

(($ The sm5lest formula sa$ Molecular formula &$ Em5rcal formula c$ #alance+ formula +$ -ormula we.ht

(,$ The true formula sa$ Molecular formula &$ Em5rcal formula c$ #alance+ formula +$ -ormula we.ht

('$ Determne the molecular formula of a com5oun+ that contans ,3 .rams of car&on an+ 1 .rams of hy+ro.en" themolecular we.ht s 10 .rams$a$ CH, &$C(H2 c$C3H%6 +$C6H(0

(2$ The em5rcal formula of 5ro&lem ('

a$CH, &$C(H2 c$C3H%2 +$C6H(0

(3$ The formula we.ht of em5rcal formula n 5ro&lem ('a$%2 &$(1 c$6/ +$ %00

(/$ No$ of atom)s* of car&on n the em5rcal formula of 5ro&lem ('a$% &$, c$2 +$/

(6$ No$ of atom)s* of hy+ro.en n the em5rcal formula of 5ro&lem ('a$% &$, c$2 +$/

(1$ No$ of atom)s* of car&on n the molecular formula of 5ro&lem ('a$% &$( c$3 +$6

,0$ No$ of atom)s* of hy+ro.en n the molecular formula of 5ro&lem ('a$, &$3 c$%6 +$(0

,%$ -or the reactonC(H3  ; O(  < CO(  ; H(O

-rom the &alance+ e=uaton +etermne the num&er of moles of O(

a$ , &$2 c$/ +$1,($ How many moles of CO(  n a &alance+ e=uaton of 5ro&lem ,%>

a$ ( &$' c$3 +$ 6,,$ How many moles of C(H3  n a &alance+ e=uaton of 5ro&lem ,%>

a$ ( &$' c$3 + $ 6,'$ How many moles of H(O n a &alance+ e=uaton of 5ro&lem ,%>

a$ ( &$' c$3 + 6,2$ How many moles of C(H3 woul+ &e nee+e+ to 5ro+uce %$62 . of CO( n a &alance+ e=uaton of 5ro&lem ,%>

a$ 0$0( &$0$0' c$0$03 +$0$06,3$ How many .rams of O( wll react wth '$/( moles of H(O n a &alance+ e=uaton of 5ro&lem ,%>

a$ /2 &$ 62 c$ %2% +$%/3,/$ How many moles of C(H3  woul+ &e nee+e+ to 5ro+uce ,$2 moles of H(O n a &alance+ e=uaton of 5ro&lem ,%$

a$ / &$ ,$2 c$ ($6 +$ %$%/,6$ -or the reacton:

-errous sulf+e ; o7y.en < -errc o7+e ; sulfur +o7+e-rom the &alance+ e=uaton how many mole)s* of o7y.en n 3 moles of sulfur +o7+e>a$ 2$2 &$ %0$2 c$ %2$2 +$ (0$2

,1$ No$of .ram)s* of ferrous sulf+e n (0 .rams of o7y.en n a &alance+ e=uaton of 5ro&lem ,6$a$,%$', &$ %/$30 c$ /$63 +$ %2

8/18/2019 Final Exam in Chemistry 1

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'0$ No$ of moles of sulfur +o7+e n 2 moles of ferrc o7+e n 5ro&lem ,6$a$ 2 &$%0 c$ %2 +$(0

'%$ No$ of moles of o7y.en n 3 moles of ferrous sulf+e n 5ro&lem ,6$a$ ($2 &$ 2$2 c$%0$2 +$ %2$2

'($ No$of mole)s* of ferrous sulf+e n a &alance+ e=uaton of 5ro&lem ,6$a$ % &$( c$ , +$ '

',$ No$of mole)s* of ferrc o7+e n a &alance+ e=uaton of 5ro&lem ,6$a$ % &$( c$ , +$ '

''$ No$of mole)s* of sulfur +o7+e n a &alance+ e=uaton of 5ro&lem ,6$a$ % &$( c$ , +$ ''2$ No$of mole)s* of o7y.en n a &alance+ e=uaton of 5ro&lem ,6$

a$ % &$, c$ 2 +$ /'3$ No$ of .ram)s* of o7y.en nee+e+ to 5ro+uce 20 .rams of ferrc o7+e n &alance+ e=uaton of 5ro&lem ,6$

a$ 2 &$%0 c$,2 +$/0'/$ No$ of moles of ferrous sulf+e n 2$6 moles of sulfur +o7+e n a &alance+ e=uaton of 5ro&lem ,6$

a$ %$'2 &$($1 c$'$,2 +$2$6'6$ No$ of .rams of sulfur +o7+e n %0$( moles of ferrc o7+e n a &alance+ e=uaton of 5ro&lem ,6$

a$ %0' &$32($6 c$%,02$3 +$(3%%'1$ No$ of .rams of ferrous sulf+e n a &alance+ e=uaton of 5ro&lem ,6$

a$ 66 &$%'' c$(3' +$,2(20$ No$ of .rams of o7y.en n a &alance+ e=uaton of 5ro&lem ,6$

a$ $%3 &$,( c$3' +$(('2%$ No$ of .rams of ferrc o7+e n a &alance+ e=uaton of 5ro&lem ,6$

a$ %30 &$,(0 c$'60 +$3'0(2($ No$ of .rams of sulfur +o7+e n a &alance+ e=uaton of 5ro&lem ,6$

a$ '6 &$3' c$%(6 +$(232,$ The num&er of mole)s* of ferrc o7+e n (, .$ of ferrous sulf+e n 5ro&lem ,6$

a$ 0$0, &$ 0$%, c$ 0$(3 +$ 0$,,2'$ The num&er of mole)s* of ferrc o7+e n ,0 .$ of ferrous sulf+e n 5ro&lem ,6 )! res5osta sera 0"%/*$

a$ 0$0, &$ 0$%, c$ 0$(3 +$ 0$,,22$ The atomc mass unt s the same wth

a$ .ram &$ atom c$ mole +$ molecule23$ -or the reacton:

So+um hy+ro7+e ; Phos5horc ac+ < so+um 5hos5hate ; water -rom the &alance+ e=uaton how many mole)s* of So+um 5hos5hate from ( moles of Phos5horc ac+ >a$ % &$ ( c$ , +$ '

2/$ No$of moles)s* of So+um hy+ro7+e are re=ure+ to com5letely react wth %$2/ mol of Phos5horc ac+ n a &alance+e=uaton of 5ro&lem 23$a$ ($%0 &$ ,$0, c$ '$/% +$ 1$03

26$ No$ of moles of Phos5horc ac+ must &e use+ to 5ro+uce+ 3$, mol of water n a &alance+ e=uaton of 5ro&lem 23$

a$ ($%0 &$ ,$0, c$ '$/% +$ 1$0321$ No$ of .rams n ( moles of so+um 5hos5hate n a &alance+ e=uaton of 5ro&lem 23$

a$ %3' &$,(6 c$ '1( +$ 32330$ No$ of moles of so+um 5hos5hate n %'/ .rams of Phos5horc ac+ n a &alance+ e=uaton of 5ro&lem 23$

a$ $02 &$ %$2 c$,$2 +$ 2$23%$ No$ of .rams of so+um 5hos5hate n %'/ .rams of Phos5horc ac+ n a &alance+ e=uaton of 5ro&lem 23$

&$ %3' &$ %6( c$(0% +$ ('33($ No$of mole)s* of So+um hy+ro7+e n a &alance+ e=uaton of 5ro&lem 23$

a$ % &$( c$ , +$ '3,$ No$of mole)s* of Phos5horc ac+ n a &alance+ e=uaton of 5ro&lem 23$

a$ % &$( c$ , +$ '3'$ No$of mole)s* of so+um 5hos5hate n a &alance+ e=uaton of 5ro&lem 23$

a$ % &$( c$ , +$ '32$ No$of mole)s* of water n a &alance+ e=uaton of 5ro&lem 23$

a$ % &$( c$ , +$ '

En+