Activity 2 knoxschools.org/kcsathome

Chemistry

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Honors Chemistry Worksheet 3 Stoichiometry Practice Problems Name __________________________ Period ______ Date _____________ Instructions: Balance the following chemical equations and then determine the missing information for each of the conditions given. The four questions related to each equation are independent of one another. Answers for a particular numbered problem should be in the same units as the information given (i.e. grams to grams, moles to moles, particles to particles). Al2O3(s) → Al(s) + O2(g) Work Area 1. 5mol ______ ______ 2. ______ 2.5mol ______ 3. 25g ______ ______ 4. ______ ______ 2.41x1024 molecules CuO(s) + H2SO4(aq) → CuSO4(aq) + H2O(l) 1. ______ .75mol ______ ______ 2. 50g ______ ______ ______ 3. ______ ______ 3.5mol ______ 4. ______ ______ ______ 1.204x1023 molecules K(s) + N2(g) → K3N(s) Work Area 1. 1.51x1023 atoms ______ ______ 2. ______ 1.25mol ______ 3. ______ ______ 25 grams

Travis Quick

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Travis Quick2.5 mol

Travis Quick1.5 mol

Travis Quick4.5 mol

Travis Quick10.0 mol

Travis Quick0.95 mol

Travis Quick1.5 mol

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Travis Quick

Travis Quick

Travis Quick

Travis QuickKCS Chemistry Activity 2Mole-to-Mole Conversions

1a) 34.7 g iron 1b) 0.718 g carbon dioxide 2a) 8.04 g Pb3O4 2b) 73.2 g lead(II) oxide 3a) 32 g aluminum oxide 3b) 11.4 g oxygen 4a) 2.91 g oxygen 4b) 5.17 g water

Stoichiometry Worksheet 3 – Gram-to-Gram Calculations Learning Target Students will calculate the theoretical yield in moles and grams Textbook Section 9.2 Directions: You must solve each of the following problems using dimensional analysis. EVERY number in

your work should be followed by a unit and a formula. 1. For this reaction: Fe3O4 + 4 CO ! 3 Fe + 4 CO2

a. How many grams of iron are produced from 23.2 grams of carbon monoxide?

b. How many grams of carbon dioxide are produced to react with 0.945 grams of Fe3O4?

2. For this reaction: 6 PbO + O2 ! 2 Pb3O4 a. How many grams of Pb3O4 are produced from 7.85 grams of lead(II) oxide?

b. How many grams of lead(II) oxide must react with 1.75 grams of oxygen?

3. For this reaction: 4 Al + 3 O2 ! 2 Al2O3 a. How many grams of aluminum oxide will be formed from 17 grams of aluminum reacting?

b. How many grams of oxygen are needed to react with 12.8 grams of aluminum?

4. For this reaction: 4 NH3 + 5 O2 ! 4 NO + 6 H2O a. How many grams of oxygen are needed to react with 1.24 grams of NH3?

b. How many grams of water are produced from 7.65 grams of oxygen?

Travis Quick

Travis Quick

Travis Quicklike we’ve been done in class.�

Travis Quick

Travis Quick

Travis QuickKCS Chemistry Activity 2Stoichiometry–Gram-to-Gram Conversions

Honors Chemistry Worksheet 3Stoichiometiy Practice Problems

DatePerl'odName

Instructions: Balance the following chemical equations" and then determine the missing information foreach of the conditions gN'en. The four questions related to each equation are independent of one another.Answers for a particular numbered problem should be in the same units as the information given (i.e.grams to grams, moles to moles, particles to particles).

2 A|203(5) —) AIM + 3 02(3)

1. 5mol

Work Area

—> 1 CuSO4(aq)i CUOM + .1 H2504(aq)

0 - 75ml

W 9M0]

1. O fl‘aml .75molM91

3, __3.6mol ___35.mol

4. Lot/vol

2_ 4.5 mol

3.5mol

i_o.0mal

Work Area—) K3N(s)

0. 37ml

2 .9 Owwl

1.5 mol

é Klsl + Nzle)

1. -7s0-__9__5_m_°!____v 0.l68ml

2. "7 «(MM 1.25mol

Travis Quick

Travis QuickKCS Chemistry Activity 2–KEYMole-to-Mole Conversions

Gram-to-Gram CalculationsStoichiometry

Directions: You must solve each of the following problems using dimensional analysis. EVERY number inyour work should be followed by a unit and a formula.

1. For this reaction: Fe304 + 4 CO 9 3 Fe + 4 C02a. How many grams of iron are produced from 23.2 grams of carbon monoxide?

23.29 COx—L—Miw’ 2'W*’F€x~———"99g“’g¢€ Fe" {milk

28.0!ch “ ammo (mm ~/. How many grams of carbon dioxide are produced to react with 0.945 grams ofMCI/304?-

A ‘ xtmlficgwx g____mlCOz \erOO‘i'CQ 07/?0;0 ($9?qu 231.9515 (wugafclwiwz

2. For this reaction: 6 PbO + O; 9 2 P‘b304a. How many grams of Pb3O4 are produced from 7.85 grams of lead(II) oxide? @fi

"was 910.1 M”(ch—HPWXMZlesOvX M91956,_ 9020+ - 8-0" 32231115 ijpbp [WIPAQVb. How many grams of lead(II) oxide must react with 1.75. Ctgrams onoxygeO?

7. M;O X 2- ‘ r ‘7 9b ‘(1 £302 \ 2 xew—M’jofl Wfie—qfi .— $290a@4650; 3 1W 0

3. For this reaction: 4 Al + 3 02 9 2 A1203a. How many grams of azluminww'um onide will beMmedfrom 17 grams faluminCumreactin ? . .

7 \,M92413 X'WO U05, OWE" ZOE—3,199l 031“ xfilc’gezfl/‘n' quim 7‘ [moi/19w; 2 3 203b. How many grams of oxygen aregneNWQededto react with 12.8 grams of aluminum?mx M\ 02 v __6c3_2_l.%©2

“’89” mama" “WM " we 01 “*1 3 014. For this reaction: 4 NH; + 5 Oz 9 4 NO + 6 H20

a. How many grams of oxygen are needed to react with 1.24 grams of NH3? q 0M—MHS 9’M 0 Aral“O m

llei‘smrbxlx. 2 I‘MMO’élz— “‘ 3 Z' V we 2170331 L1W MM;

b. How many grams of water are produced from 7.65 grams of oxygen? 0\

710' 56) oz 7‘ ,____,lM Oz X Mex. film)£1420 9‘ )73 Wt)glfilqtighuz BMOZ I l 0‘

la) 34.7 3 iron 1b) 0.718 3 carbon dioxide 2a) 8.04 g Pb3043a) 32 g aluminum oxide 3b) 11.4 3 oxygen 43) 2.91 3 oxygen

2b) 73.2 g lead(II) oxide4b) 5.17 3 water

Travis Quick

Travis Quick

Travis QuickKCS Chemistry Activity 2–KEYStoichiometry–Gram-to-Gram Conversions