## Q3: Week 5 – Archive

Week of 3/9 – 3/13

3/9 – Monday – period 7 –

1. Give back RAT 39
2. Stiochiometry continues

stiochiometry ditto 1 0607.pdf

stiochiometry ditto 1 KEY 0607.pdf

HW:

-the second question 2 on the front side of stiochiometry ditto 1 0607.pdf  worksheet.
– question 6 on the backside of stiochiometry ditto 1 0607.pdf worksheet.
– question  1: a,b,c,d,e 0n the first side stiochiometry ditto 2a and 2 combined 0607.pdf worksheet.

2: Review with keys or watch me go over the homework questions with the video below:

stiochiometry ditto 2a and 2 combined 0607.pdf

stiochiometry ditto 2 key 0607 p.pdf

Reviewing the homework with this lecture:

3/10 – Tuesday – period 7 –

1:Review of Stiochiometry problems

2: Begin Lab 15

period 8 –
Lab 15 –

1: collected Cu by the “Hot Filtration” method and is drying.
2: Should have the most of the lab completed.

HW:
1: Please complete the 1st side of the tsiochiometry ditto 2a and 2 combined 0607.pdf  worksheet.
2: Please review with the key.

3/11 – Wednesday – period 7 –

1: RAT 40 – Stiochiometry

HW:
1: Please complete the 10 Regents Questions Below.  I have a hardcopy below if you would find it helpful to print out a hard copy.

CAT 13 review questions 1.pdf

2: Place in the Form below.
1. Which equation represents a single replacement reaction?
1. 2H2O2 → 2H2O + O2
2. 2H2 + O2 → 2H2O
3. H2SO4 + Mg → H2 + MgSO4
4. HCl + KOH → KCl + H2O

2. Given the balanced equation representing a reaction:

Al2(SO4)3 + 6NaOH → 2Al(OH)3 + 3Na2SO4

The mole ratio of NaOH to Al(OH)3 is

1. 1:1
2. 1:3
3. 3:1
4. 3:7

3. The coefficients in a balanced chemical equation represent
1. the mass ratios of the substances in the reaction
2. the mole ratios of the substances in the reaction
3. the total number of electrons in the reaction
4. the total number of elements in the reaction

4.  Given the incomplete equation representing a reaction:

2C6H14 + ______ O2 → 12CO2 + 14H2O

What is the coefficient of O2 when the equation is completely balanced using the smallest whole-number coefficients?

1. 13
2. 14
3. 19
4. 26

5. What is the total number of different elements present in NH4NO3?
1. 7
2. 9
3. 3
4. 4

6.  Vitamin C, also known as ascorbic acid, is water soluble and cannot be produced by the human body. Each day, a person’s diet should include a source of vitamin C, such as orange juice. Ascorbic acid has a molecular formula of C6H8O6 and a gram-formula mass of 176 grams per mole.

Which formula represents the empirical formula for ascorbic acid?

1. C6H8O6
2. CHO
3. C2H2O2
4. C3H4O3
7. Given the balanced equation representing a reaction:

2H2 + O2 → 2H2O

What is the mass of H2O produced when 10.0 grams of H2 reacts completely with 80.0 grams of O2?

1. 70.0 g
2. 90.0 g
3. 180. g
4. 800. g
8.  Given the balanced equation representing a reaction:

2C2H6 + 7 O2 → 4CO2 + 6H2O

Determine the total number of moles of oxygen that react completely with 8.0 moles of C2H6.

9 . A compound has the empirical formula CH2O and a gram-formula mass of 60. grams per mole. What is the molecular formula of this compound?
1. CH2O
2. C2H4O2
3. C3H8O
4. C4H8O4
10Which equation shows conservation of atoms?
1. H2 + O2 → H2O
2. H2 + O2 → 2H2O
3. 2H2 + O2 → 2H2O
4. 2H2 + 2O2 → 2H2O

3/12 – THursday – period 7/8

1: Review homework form
2: Review of RAT 40 – The key is linked through power school
3: Lab 16 – complete data collection.
4: Started Lab 17

HW:
Please complete the selected questions below and enter into the form below:

1. What is the gram-formula mass of Fe(NO3)3?

1. 146 g/mol
2. 194 g/mol
3. 214 g/mol
4. 242 g/mol
2.Given the formula for a compound: Which molecular formula and empirical formula represent this compound?

1. C2HNO2 and CHNO
2. C2HNO2 and C2HNO2
3. C4H2N2O4 and CHNO
4. C4H2N2O4 and C2HNO2

3.  Given the balanced equations representing two chemical reactions:

Cl2 + 2NaBr → 2NaCl + Br2
2NaCl → 2Na + Cl2

Which types of chemical reactions are represented by these equations?

1. single replacement and decomposition
2. single replacement and double replacement
3. synthesis and decomposition
4. synthesis and double replacement

4. What is the chemical formula of iron(III) sulfide?
1. FeS
2. Fe2S3
3. FeSO3
4. Fe2(SO3)3
5. The gram-formula mass of a compound is 48 grams. The mass of 1.0 mole of this compound is
1. 1.0 g
2. 4.8 g
3. 48 g
4. 480 g

6. Given the following:

H3C6H5O7(aq) + 3NaHCO3(aq) → Na3C6H5O7(aq) + 3CO2(g) + 3 _______ ( )

Which product formula correctly completes the equation?

1. COH2
2. H2O
3. NaOH
4. COOH
7.  The percent composition by mass of nitrogen in NH4OH (gram-formula mass = 35 grams/mole) is equal to
1. 2. 3. 4. 8. The gram-formula mass of NO2 is defined as the mass of
1. one mole of NO2
2. one molecule of NO2
3. two moles of NO
4. two molecules of NO
9. A 1.0-mole sample of krypton gas has a mass of:
1. 19 g
2. 36 g
3. 39 g
4. 84 g
10. Given the balanced equation representing a reaction:
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)
What is the total number of moles of O2(g) required for the complete combustion of 1.5 moles of C3H8(g)?
1. 0.30 mol
2. 1.5 mol
3. 4.5 mol
4. 7.5 mol
11. Given the balanced equation representing a reaction:
4NH3 + 5O2 → 4NO + 6H2O
What is the minimum number of moles of O2 that are needed to completely react with 16 moles of NH3?
1. 16 mol
2. 20. mol
3. 64 mol
4. 80. mol
12. A sample of a compound contains 65.4 grams of zinc, 12.0 grams of carbon, and 48.0 grams of oxygen. What is the mole ratio of zinc to carbon to oxygen in this compound?
1. 1:1:2
2. 1:1:3
3. 1:4:6
4. 5:1:4
13. Which equation shows a conservation of mass?
1. Na + Cl2 → NaCl
2. Al + Br2 → AlBr3
3. H2O → H2 + O2
4. PCl5 → PCl3 + Cl2
14. What is the molecular formula of a compound that has a molecular mass of 54 and the empirical formula C2H3?
1. C2H3
2. C4H6
3. C6H9
4. C8H12

15. A hydrate is a compound that includes water molecules within its crystal structure. During an experiment to determine the percent by mass of water in a hydrated crystal, a student found the mass of the hydrated crystal to be 4.10 grams. After heating to constant mass, the mass was 3.70 grams. What is the percent by mass of water in this crystal?

1. 90.%
2. 11%
3. 9.8%
4. 0.40%

16. What is the total number of atoms contained in 2.00 moles of nickel?

1. 58.9
2. 118
3. 6.02 × 1023
4. 1.20 × 1024

3/13 – Friday – period 7/8

*No CAT Today

CAT 13 – Monday –

1: Review Homework
2: LAB 17 continue.

HW:

1. Study for CAT 13

 Readiness Assessment Test 38 – math 1 .pdf
 Readiness Assessment Test 38 – math 1 Key.pdf
Readiness Assessment Test 39 – math 2 .pdf
Readiness Assessment Test 39 – math 2 KEY.pdf
 Readiness Assessment Test 40 – math 3 .pdf
Readiness Assessment Test 40 – math 3 key.pdf
CAT 12- math 1 .pdf
CAT 12- math 1 Key.pdf