General Questions and Answers

A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)₂(aq), until no further precipitation occurs. The precipitate is collected by filtration, dried, and weighed. A total of 15.32 g PbCl₂ (s) is obtained from 200.0 mL of the original solution. Calculate the molarity of the Pb(NO3)₂(aq) solution.

A sample of 75.4 g of tetraphosphorous decoxide (P.O₁0) reacts with 43.4 g of water to produce phosphoric acid (H₂PO4) according to the following balanced equation. PO₁0+ 6H₂0-4H,PO Determine the limiting reactant for the reaction. OH,PO H₂O P4O10 Calculate the mass of H,PO, produced in the reaction. mass of H3PO4: Calculate the percent yield of H,PO, if 49.1 g of H, PO, is isolated after carrying out the reaction.

Consider the combustion reaction for octane (C, H,g), which is a primary component of gasoline. 2Cg H₁8 +250₂ ⇒ 16CO₂ +18 H₂O How many moles of CO₂ are emitted into the atmosphere when 24.1 g C, H,g is burned?

What mass of aluminum chloride is required to produce 0.125 moles of aluminum sulfide according to the following equation? AlCl3 = 133.34 g/mol 2AICI3(aq) + 3H₂S(aq) → Al₂S3(s) + 6HCl(aq) 16.7 g 66.6 g 18.8 g 33.3 g

Glucose, C6H₁2O6, is used as an energy source by the human body. The overall reaction in the body is described by the equation C6H₁₂O6(aq) + 60₂(g) → 6CO₂(g) + 6H₂O(1) Calculate the number of grams of oxygen required to convert 58.0 g of glucose to CO₂ and H₂O. mass of 0₂: Calculate the number of grams of CO₂ produced. mass of CO₂: g g

Combining 0.225 mol Fe₂O, with excess carbon produced 13.9 g Fe. Fe₂O3 + 3C2 Fe + 3 CO What is the actual yield of iron in moles? actual yield: What is the theoretical yield of iron in moles? theoretical yield: What is the percent yield?

Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous Nal. Include phases. chemical equation: What mass of precipitate will form if 1.50 L of highly concentrated Pb(ClO3)₂ is mixed with 0.850 L 0.210 M Nal? Assume the reaction goes to completion.

For the chemical reaction shown, 2H₂O₂(1) + N₂H₂(1)→ 4H₂O(g) + N₂(g) determine how many grams of N₂ are produced from the reaction of 8.44 g of H₂O2 and 5.54 g of N₂H4.

Consider the reaction. 2 Pb(s) + O₂(g) → 2 PbO(s) An excess of oxygen reacts with 451.4 g of lead, forming 351.9 g of lead(II) oxide. Calculate the percent yield the reaction.

Write the balanced neutralization reaction that occurs between H,SO, and KOH in aqueous solution. Phases are optional. neutralization reaction: Suppose 0.350 L of 0.400 M H₂SO, is mixed with 0.300 L of 0.210 M KOH. What concentration of sulfuric acid remains after neutralization?

Pure iron, Fe, can be produced from an ore called hematite, Fe₂O3, by reaction with carbon at high temperatures. 2 Fe₂O3 + 3C 4 Fe + 3 CO₂ How many tons of hematite must react with carbon if an iron company needs to make 61 tons of iron?

A 14.554 g sample of CaCl₂ was added to 12.372 g of K₂CO3 and mixed in water. A 3.522 g yield of CaCO3 was obtained. What is the limiting reagent? K₂CO3 CaCO3 CaCl₂ Calculate the percent yield of CaCO3. yield of CaCO3 = %

The first step in the reaction of Alka-Seltzer with stomach acid consists of one mole of sodium bicarbonate (NaHCO3) reacting with one mole of hydrochloric acid (HCI) to produce one mole of carbonic acid (H₂CO3), and one mole of sodium chloride (NaCl). Using this chemical stoichiometry, determine the number of moles of carbonic acid that can be produced from 3 mol NaHCO3 and 7 mol HCl. moles of carbonic acid: Which of the two reactants limits the number of moles of H₂CO3 that can be made? NaHCO3 OHCI How much excess reactant remains after the reaction?

When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3(s) + 2 HCl(aq) CaCl₂(aq) + H₂O(1) + CO₂(g) How many grams of calcium chloride will be produced when 26.0 g of calcium carbonate is combined with 11.0 g of hydrochloric acid? mass of CaCl₂: Which reactant is in excess? CaCO3 HCI How many grams of the excess reactant will remain after the reaction is complete?

N₂(g) + 3 H₂(g) →→→ 2NH₂(g) Assume 0.220 mol N₂ and 0.704 mol H₂ are present initially. After complete reaction, how many moles of ammonia are produced? How many moles of H₂ remain? How many moles of N₂ remain?

Iodine is prepared both in the laboratory and commercially by adding Cl, (g) to an aqueous solution containing sodium iodide. 2 Nal(aq) + Cl₂(g) → L₂(s) + 2 NaCl(aq) How many grams of sodium iodide, Nal, must be used to produce 67.6 g of iodine, 1₂?

Connectives are especially important In argumentative writing because they clarify the relationship between claims, counterclaims, and evidence they make for smoother transitions between different sections of an essay- they help build an argument All of the choices

Who was James II? A. King of England during the Restoration period B. Catholic King of England who's actions led to the Glorious Revolution C. King of England who lost the English Civil War D. Puritan ruler following the death of Oliver Cromwell

When anticipating a counterclaim, which question should you consider? Why might readers disagree with my thesis? What arguments might support another view? What evidence might be presented with arguments that support another view? All of the choices

A sample of an unknown gas effuses in 12.3 min. An equal volume of H₂ in the same apparatus under the same conditions effuses in 2.42 min. What is the molar mass of the unknown gas? g/mol

A sample of air contains 78.08% nitrogen, 20.94% oxygen, 0.0500% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 4.85 L of the sample at 84°C and 2.46 atm? Enter your answers in scientific notation.

Trusted resources are known locally less nationally little

Which connective does the writer use in the text below to clarify the relationship between claim and counterclaim? Some might argue that even more people speak Chinese-about 1025 million. However, learning Spanish is easier or an English speaker, because the two languages are not so different. Easier Even more However None of the choices

During the brainstorming phase of your writing an argumentative essay, you should write down everything that comes to your mind about the topic use a thinking map to help organize your thoughts begin to formulate a thesis statement All of the choices

In the of music, the composer uses a poem as the basis of his music and writes different music for each stanza. strophic form through-composed form modified strophic form ABA form

For English Language Arts (ELA) you should use formatting. Modern Language Association (MLA) Chicago American Psychological Association (APA) foot-note

An author's use of pronouns such as he, she, they, and it in reference to characters is termed if the perspective does NOT reveal the inner thoughts or motives of any of the characters. first person second person third person objective fourth person

Is a means of giving credit to an author in the body of an essay. Hanging indent Bibliography Parenthetical documentation Thesis statement

Which of the following options links the evidence to the claim in an argumentative essay? Proofs Warrants Beliefs Logos

Where are arguments found? In everyday life and communication In politics and everyday life In newspapers and communications Between parents and children and politics

We elect a U.S. Representative for how many years? 2 4 6 8

Which of the following is important to keep in mind when selecting a topic for an argumentative essay? Choose a topic about which you feel strong emotions. Pick a topic about which you know a great deal. Select a topic for which you can use reasons and debate to strengthen your position. Write about a controversial topic in order to gain readers' interest.

When Jane and Elizabeth were alone, the former, who had been cautious in her praise of Mr. Bingley before, expressed to her sister how very much she admired him. "He is just what a young man ought to be," said she, "sensible, good humoured, lively; and I never saw such happy manners! -- so much ease, with such perfect good breeding!" The third-person point of view The second-person point of view Omniscient point of view The first-person point of view

Which of the following years will have an off-year election? 2012 2016 2019 2020

When does Congress adjourn? When the Senate ends the session When the House of Representatives ends the session When the President ends the session When both houses agree to end the session

What does the President's Cabinet do? Advises the Vice President Holds the China. Advises the President None of the choices

Which of the following is NOT a course of action that the President may take when presented with a bill? sign the bill. Veto the bill. Edit Items in the bill. Use the pocket veto.

Which of the following is NOT a judicial power of the President? judgment Reprieve Pardon Amnesty

Congress allows each state to decide whether to elect its members by a general ticket system or on 'a________ district basis. dual-member Otriple-member single-member two-member

If we do not receive payment from your company within a week, we will be forced to turn your account over to a collection agency. Identify the tone of the letter above. Friendly Formal Convincing Threatening

Be respectful to your superiors, if you have any, also to strangers, and sometimes to others. If a person offends you and you are in doubt as to whether it was intentional or not, do not resort to extreme measures; simply watch your chance and hit him with a brick. That will be sufficient. If you. shall find that he had not intended any offense, come out frankly and confess yourself in the wrong when you struck him; acknowledge it like a man and say you didn't mean to. Yes, always avoid violence; in this age of charity and kindliness, the time has gone by for such things. Leave dynamite to the low and unrefined. Go to bed early, get up early--this is wise. Some authorities say get up with the sun; some say get up with one thing, others with another. But a lark is really the best thing to get up with. It gives you a splendid reputation with everybody to know that you get up with the lark; and if you get the right kind of lark, and work at him right, you can easily train him to get up at half past nine, every time--it's no trick at all. What is the point of view used in the excerpt above? First person Second person Third person Omniscient

Which of the following are basic elements of the U.S. political culture? 1. Economic equality II. Individualism 'Ill. Civic duty II and III only I only Ill only II only

Which of the following words is a synonym of the word "fallacy"? Reliable. Prove Misleading Proof

Choose the correct answer, Tone refers to the writer's attitude toward the subject reader boss reader and subject

Determine the products of the following reactions and classify the following reactions into precipitation, acid-base, or oxidation-reduction a. Reaction between Zn(s) and Cu(NO3)2(39) b. Reaction between H₂SO4(ag) and NaOH(aq) c. Reaction between H3PO4(ag) and KOH(aq) d. Reaction between Na₂SO4(aq) and BaCl₂(aq) e. Reaction between HCl(aq) and Na₂CO3(aq)

Choose the correct answer. A is an indentation of the second line of a citation, parenthetical documentation hanging indent criticism bibliography

Music composed purely as music and is not intended to represent something else is known as absolute music program music non-absolute music Incidental music

What does public opinion refer to? The measurable attitudes of an audience or sample of the population The ideas and attitudes held by a group of people on politically-related issues The ideas and attitudes of an individual on politically-related issues The ideas and attitudes held by the majority of a group

In a democracy, decision making should be a matter of majority rule majority rights compromise minority rights

Who holds power in an oligarchy? The general body of people A single person A small group of elites holds the power A representative body