Eric

Describe common themes in the romantic period,the victorian era,and the modern era. Explain the main elements of the historical context that contributed to the themes in each era.

8. Which behavioral principle best fits the situation in question number seven?

(1 point)

Stimulation generation

Extinction

Positive punishment

Negative reinforcement

9. To which drug category does cocaine belong? (1 point)

Designer drugs

Hallucinogens

Inhalants

Central nervous system stimulants

10. To which drug category does marijuana belong?

(1 point)

Cannabis compounds

Central nervous system depressants

Opioids

Designer drugs

What causes a reaction to be spontaneous? Complete by answering each part a) (1 point) What is definition of spontaneous reaction? b) (1points) What is Gibbs free energy? c) (1 point) How is Gibbs free energy related to a spontaneous reaction? d) (1 point) What is an example of a spontaneous reaction? e) (1 point) Why is it spontaneous?

Which of the following is true about single replacement reactions? (choose 2 answers) *

They are restricted to metals.

You will have two reactants and two products.

If a metal is involved, the reactant elemental metal will be above the metal that is in the compound on the activity series.

If a metal is involved, the reactant elemental metal will be below the metal that is in the compound on the activity series.

27. (1 point) How many moles of copper atoms are in 8.4 x 10²⁴ atoms of copper? *

1.4 x 10¹ moles

1.4 x 10² molesxxx

7.5 x 10⁻¹ moles

7.5 moles

28. (1 point) How many moles do you have if you have 460 L of Ne gas at STP? *

0.049 moles

0.05 moles xxx

15 moles

21 moles

22. (1 point) The electron configuration of Ca⁺² ion is _______ *

1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

The same as Ar

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

The same as Kr

27. (1 point) How many moles of copper atoms are in 8.4 x 10²⁴ atoms of copper? *

1.4 x 10¹ moles

1.4 x 10² moles

7.5 x 10⁻¹ moles

7.5 moles

28. (1 point) How many moles do you have if you have 460 L of Ne gas at STP? *

0.049 moles

0.05 moles

15 moles

21 moles

31. (1 point) The product of a COMBINATION reaction is Ca(OH)₂ . If one of the reactants is water H₂O what is the other reactant? *

CaH

CaO₂

Ca₂O

CaO

32. (2 points) Which of the following is true about single replacement reactions? (choose 2 answers) *

They are restricted to metals.

You will have two reactants and two products.

If a metal is involved, the reactant elemental metal will be above the metal that is in the compound on the activity series.

If a metal is involved, the reactant elemental metal will be below the metal that is in the compound on the activity series.

34. (1 point) Identify the limiting reagent and the volume of CO₂ formed when 11 L CS₂ react with 21 L O₂ to produce CO₂ gas and SO₂ gas at STP. CS₂ (g) +3O₂(g) → CO₂(g) +2SO₂(g) *

CS₂ is limiting , 7.0L CO₂ produced

O₂ is limiting , 7.0L CO₂ produced

CS₂ is limiting , 11L CO₂ produced

CS₂ is limiting , 21L CO₂ produced

5. (1 point) Express the product of 5.5 x 10⁻⁴ m and 8.33 x 10⁷ m using the correct number of significant digits. *

45.815 x 10³ m²

4.6 x 10³ m²

4.6 x 10⁴ m²

4.58 x 10⁴ m²

6. (1 point) What is the volume of 75.4 g of silver if the density of silver is 10.5g/mL ? *

0.139mL

7.18 mL

792 mL

None of the above

1. (2 point) Which of the following are NOT one of the five fields of chemistry? (choose two answers) *

Pure chemistry

Applied chemistry

Biochemistry

Analytical chemistry

2. (1 point) Which of the following cannot be observed in a macroscopic view? *

Structure of a plant cell

Shape of a soybean plant

X-ray of an elbow joint

Fiberglass insulation

3. (1 point) Which variable is changed during an experiment? *

responding

dependent

manipulated

hypothesis

Which of these excerpts from Beowulf evidences both pagan and Christian influences?

"...Dared to touch...Hrothgar's glorious/Throne, protected by god..."

"Grendel, who haunted the moor.../...and made his home in a hell..."

"...the poet's clear songs.../recalling.../the Almighty making the earth..."

"...sacrificed to the old stone gods,/...hoping for...the Devil's guidance..." <--

Which of these excerpts from Beowulf best describes Beowulf's reason for attacking Grendel's mother?

"...she drew/A dagger, brown with dried blood, and prepared/ To avenge.." <---

"...and Holy/God, who sent him victory, gave judgment/ For truth and right..."

"...So fame/Comes to the men who mean to win it/And care about nothing else!"

"...the sword was wet/ With her blood, and Beowulf rejoiced at the sight."

Which of these excerpts from Beowulf's "The Battle With the Dragon" most plainly casts the dragon as the tale's antagonist?

"Vomiting fire and smoke, the dragon/Burned down their homes."

"Then it hurried back/To its tower, to its hidden treasure, before dawn..." <---

"...Beowulf's/Sorrow beat at his heart: he accused/himself..."

"...So Beowulf swam sadly back/To Greatland, almost the only survivor..."

Read this excerpt from "The Seafarer."

"...hardship groaned/Around my heart. Hunger tore/At my sea-weary soul..."

Which of these best describes the tone evoked by these words?

Resignation

Anger <---

Despondence

Contentment

8) ( 1 point) What is the maximum number of grams PH₃ that can be formed when 3.4 g of phosphorus reacts with 4 grams of hydrogen to form PH₃? P₄ (g) +6H₂ (g) → 4PH₃ (g) *

3.7 g

6.8 g

45 g

270 g

5) (1 point) Iron(III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe₂O₃ are formed when 25.9 g of Fe reacts completely with oxygen? 4Fe(s) + 3O₂(g) → 2Fe₂O₃(s) *

12.0 g

25.0 g

37.0g

49.0 g

6) ( 1 point) How many liters of NH₃ are needed to react completely with 45.0L of NO (at STP)? 4NH₃(g) + 6NO (g) → 5N₂ (g) + 6H₂O (g) *

9.0 L

20.0 L

30.0 L

180.0 L

7) ( 1 point) How many liters of NH₃, at STP will react with 10.6g O₂ to form NO₂ and water? 4NH₃(g) + 7O₂ (g) → 4NO₂(g) + 6 H₂O (g) *

2.12 L

3.03 L

4.24 L

6.49 L

1) (1 point) You are following a recipe that calls for 1 egg and 1/3 cup of oil for every cup of flour. In the refrigerator you find that you have 3 eggs and 1 cup of oil, how much flour will you need to use all of the eggs and oil? *

1 cup

2 cups

3 cups

4 cups

2) (1 point) In any chemical reaction the quantities that are preserved are _____. *

mass and moles

the number of molecules and the volumes

the number of moles and the volumes

mass and number of atoms

3) (1 point) How many moles of aluminum are needed to react with 2.7 mol of FeO? 2Al(s) + 3FeO(s) → 3Fe(s) +Al₂O₃(s) *

1.8 mol

2.1 mol

2.7 mol

5.4 mol

4) (1 point) Which type of stoichiometric calculation does not require you to use the molar mass? *

volume – volume problems

mass – particle problems

mass – mass problems

mass – volume problems