General Questions and Answers

Which group lost its political fight in terms of the ratification of the Constitution, but significantly contributed to the addition of the Bill of Rights? The Republicans The Federalists The Anti-Federalists The Torles

The combustion of a sample of butane, C4H10 (lighter fluid), produced 2.46 grams of water. 2 C4H10+ 13 0₂----> 8 CO₂ + 10 H₂O (a) How many grams of butane burned? (b) How much oxygen was used up in Liters?

1. How many MOLECULES of water are present in 1.76 moles of this compound? molecules. 2. How many MOLES of water are present in 4.53×1022 molecules of this compound? moles.

The Anti-Federalists believed __ was the greatest threat to the future of the country. a centralized bank a powerful central government a powerful judiciary a powerful private business sector

The legislative, executive and judicial branches are established in the Bill of Rights the First Amendment the first three Articles of the Constitution the Second through Fourth Articles of the Constitution

Discussions about post war decisions, including the division of Germany, Stalin's request for communist satellite states and the creation of the United Nations were discussed by Churchill, Stalin and Roosevelt at which meeting in early 1945? Munich Conference Geneva Convention Berlin Conference Yalta Conference

The similarity between Ernst Rutherford's and Niels Bohr's model of the atom is that they contain ___ and ___ orbit the nucleus, respectively. a nucleus, negatively charged protons a nucleus, negatively charged electrons a nucleus, negatively charged neutrons a nucleus, negatively charged atoms

Although we usually think of substances as "burning" only in oxygen gas, the process of rapid oxidation to produce a flame may also take place in other strongly oxidizing gases. For example, when iron is heated and placed in pure chlorine gas, the iron "burns" according to the following (unbalanced) reaction: Fe(s) + Cl₂(g) → FeCl3 (s) How many milligrams of iron(III) chloride result when 10.50 mg of iron is reacted with an excess of chlorine gas? mg FeCls

Group of people that the Nazis viewed as the master race, with the first class consisting of blond haired, blue eyed athletically fit individuals. Aryans Armenian Slavic Celtic

How many Jews lost their lives as a result of Hitler's "Final Solution" during the Holocaust 13 million 1 million 6 million 40 million

1. How many MOLECULES of dioxygen difluoride are present in 9.03 grams of this compound? __ molecules. 2. How many GRAMS of dioxygen difluoride are present in 4.58×1022 molecules of this compound? grams.

All the following groups were targeted by the Nazis during the course of the Holocaust EXCEPT... Poles Handicapped Individuals and Homosexuals Soviet Prisoners of War and political opponents Aryans

Does a reaction occur when aqueous solutions of potassium hydroxide and nickel(II) nitrate are combined? yes no If a reaction does occur, write the net ionic equation. Use the solubility rules provided in the OWL Preparation Page to determine the solubility of compounds. Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank. __+__ ⇒ __

Which of these methods of amending the U.S. Constitution was used just once, to ratify the 21st Amendment, which ended prohibition of alcohol? It is proposed by a two-thirds vote in each house of Congress and approved by three-fourths of the state legislatures. It is proposed by a two-thirds vote in each house of Congress and approved by state conventions in three-quarters of the states. It is proposed by a convention called by two-thirds of the states and approved by a convention of three-quarters of the states.

Does a reaction occur when aqueous solutions of sodium phosphate and lead(II) nitrate are combined? yes no If a reaction does occur, write the net ionic equation. Use the solubility rules provided in the OWL Preparation Page to determine the solubility of compounds. Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank.

How does Niels Bohr's model differ from Ernst Rutherford's model? Niels Bohr's model Improved Ernst Rutherford's model by focusing more on the nucleus. Niels Bohr's model Improved Ernst Rutherford's model by focusing more on the protons. Niels Bohr's model focused on the neutrons. Niels Bohr's model focused on the electrons.

Which statement BEST explains why a manufacturer may decide to use a high temperature for the production of a certain chemical when according to Le Chatelier's principle a low temperature maximizes the amount of this chemical formed? The reaction will release more heat at a high temperature. The reaction will become irreversible at a high temperature. The reaction will proceed at a faster rate at a high temperature. The reaction will require less raw material at a high temperature.

Identify each of the following unbalanced reaction equations as belonging to one or more of the following categories: precipitation, acid-base, or oxidation-reduction. (Select all that apply.) AlCl3 (aq) + H3PO4 (aq) → AlPO4(s) + HCl(aq) a. precipitation acid-base oxidation-reduction HCl(aq) + Ca(s) → H₂(g) +CaCl₂ (aq) b. precipitation acid-base 6 oxidation-reduction HCl(aq) + RbOH(aq) → H₂O(l) + RbCl(aq) c. precipitation acid-base oxidation-reduction

A certain element consists of two stable isotopes. The first has an atomic mass of 106.9051 amu and a percent natural abundance of 51.82 %. The second has an atomic mass of 108.9047 amu and a percent natural abundance of 48.18%. What is the atomic weight of the element? amu

Which totalitarian leader used violent removals of opponents, known as purges, subjecting the victims to execution or life in labor camps known as gulags? Hideki Tojo Adolf Hitler Benito Mussolini Joseph Stalin

When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are: __iron (s) +____chlorine (g) →→→→ __iron(III) chloride (s)

What country became a communist nation in 1949, expanding the anxiety of the spread of communism in Asia? China Japan India Philippines

A common experiment in introductory chemistry courses involves heating a weighed mixture of potassium chlorate, KCIO3, and potassium chloride. Potassium chlorate decomposes when heated, producing potassium chloride and evolving oxygen gas. By measuring the volume of oxygen gas produced in this experiment, students can calculate the relative percentage of KCIO3 and KCl in the original mixture. Choose the balanced chemical equation for this process. KCIO3 (8)→ 2KC1(s) + 3N2 (9) 2KC103 (8)→ 2KCl(s) + 302 (g) KC103 (s) → 2KCl(s) +502 (9) KCIO3(s) → KCl(s) +202 (9)

British Prime Minister during the course of WWII whose leadership guided them to persevere during the war. Harry Truman Winston Churchill Neville Chamberlain Joseph Goebbels

If Sample #1 contains 2.3 moles of chlorine gas in a 3.5 liter balloon and at the same conditions Sample #2 contains 1.2 moles of chlorine gas, what is the volume of the balloon that contains sample #2?

If aqueous solutions of potassium chromate and strontium chloride are mixed, a bright yellow solid (strontium chromate) forms and settles out of the mixture, leaving potassium chloride in the solution. Choose a balanced chemical equation for this process. K₂ CrO4 (aq) + SrCl₂ (aq) → SrCrO4(s) + 2KCl(aq) K₂ CrO4 (aq) + 3SrCl₂ (aq) → 4SrCrO4(s) + 2KCl(aq) K₂ CrO4 (aq) + 2SrCl₂ (aq) → 5SrCrO4(s) + 3KCl(aq) K₂ CrO4 (aq) + 3SrCl₂ (aq) → SrCrO4(s) + KCl(aq)

Choose the balanced equations that show how three of the common strong acids ionize to produce a hydrogen ion. (Select all that apply.) C3H7 COOH(aq) → H+ (aq) + C3H7COO- (aq) C4H, COOH(aq) → H+ (aq) + C₂H₂ COO¯ (aq) HCl(aq) → H+ (aq) + Cl¯ (aq) HCIO4 (aq) → H+ (aq) + ClO4 (aq) HNO3(aq) → H+ (aq) + NO3(aq) HCOOH(aq) → H*(aq) + HCO(aq)

"From Stettin in the Baltic to Trieste in the Adriatic an Iron Curtain has descended across the Continent. Behind that line lie all the capitals of the ancient states of Central and Eastern Europe. Warsaw, Berlin, Prague, Vienna, Budapest, Belgrade, Bucharest and Sofia; all these famous cities and the populations around them lie in what I must call the Soviet sphere, and all are subject, in one form or another, not only to Soviet influence but to a very high and in some cases increasing measure of control from Moscow." What was Winston Churchill's conveying with the" Iron Curtain" speech in 1946? 32 of 45 Winston Churchill 1946 Speech at Westminster College, Missouri That the industrial growth of communist nations had made them a threat to the global economy That Soviet's had built massive fortifications along the German border Western European nations were unable to trade with countries in Eastern Europe after WWII That communist control over Eastern Europe under the Soviet Union was a threat to Europe E 26 16:3 Nex

Merchants usually sell small nuts, washers, and bolts by weight (like jelly beans!) rather than by individually counting the items. Suppose a particular type of washer weighs 0.120 g on the average. a. What would 94 such washers weigh? g b. How many washers would there be 194 g of washers? washers

Given the combustion reaction C3H8 +50₂ = 3CO₂+ 4H₂O, how many grams of water can be produced from 1.00 liter of O₂at standard temperature and pressure? 64 g 9.9 g 1.21 g 1.67 g

Ammonia and oxygen can react to produce nitrogen and water. Following is the balanced reaction: 4NH₁+30₂= 2N₂ + 6H₂O Suppose 28 liters of oxygen gas react completely with ammonia. How many liters of nitrogen will be produced at STP? 192.1 14.0 22.4 18.7

Consider four sealed, rigid containers with the following volumes: 50 mL, 100 mL, 250 mL, and 500 mL. If each of these contains .25 moles of helium gas at standard temperature, which container would have the greatest pressure? 50 mL 100 mL 250 mL 500 mL

A dime is found to have a volume of 0.430 mL. Using unit analysis, show what the volume of this dime is in L. Use one of the following to set up the conversion factor. 1 kg = 1000 g 1000 mL = 1 L 100 cm = 1 m 1000 mg = 1 g 1 mL = 1 cm³ 1000 mm 1 m

In the chemical reaction represented by the equation wA + XB → yC + zD, a comparison of the number of moles of A to the number of moles of C would be a(n) mole ratio. mass ratio. electron ratio. energy proportion.

Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 51.87-g sample of fluorite contains 25.36 g of fluorine. Calculate the following: (a) Mass of calcium in the sample. g Ca (b) Mass fractions of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass fraction Ca mass fraction F (c) Mass percents of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass % Ca mass % F

A chemistry student weighs out 0.174 g of citric acid (H,C,H,O,), a triprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1200M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits.

What is the name of the compound with the formula K₂O ? What is the name of the compound with the formula Nal ? What is the name of the compound with the formula AIF3 ?

Suppose you discover a new compound. It consists of 58.80% C, 9.87% H, and 31.33% O. What is the empirical formula of the new compound? A) C6H1003 B) C5H1002 C) CH₂O D) C4.9H9.801.9 E) C4H₂O₂

What number of moles of O₂ is needed to produce 75 grams of P4010 from P? (Molecular weight P4010284 g/mol) 0.26 moles 2.64 moles 0.5 moles 1.25 moles

For the reaction 4 KO₂ + 2 H₂O → 30₂ + 4 KOH, what mass of H₂O is needed to reach with 3.16 g of KO₂? If needed, the molar mass of each substance is given below: KO₂=71.10 g/mol H₂O = 18.02 g/mol O₂ = 32.00 g/mol KOH= 56.11 g/mol This is how you will be graded on this question: 7 pts: For showing all your work 1 pt: You have the correct final answer. - Redo

Which change to the manufacturing process for calcium oxide (Cao) would maximize the amount of CaO formed? change the heating of CaCO3 from 1,000 °C to 500 °C change from a low to a high pressure reaction system change from a closed to an open reaction system that vents CO₂ gas change from continually removing CaO from the reaction system to producing CaO in batches

6CO₂+ 6H₂= C6H1206+ 602 How many liters of O₂can be produced from 100 g of water at standard temperature and pressure? 1.49 liters 24.8 liters 80.4 liters 124 liters

Suppose 50.0 mL of 0.790 M CoCl2 solution is added to 68.0 mL of 0.310 M NiCl₂ solution. Calculate the concentration, in moles per liter, of each of the ions present after mixing. Assume that the volumes are additive. Concentration of Co²+ = mol/L Concentration of Ni²+ = mol/L Concentration of CI = mol/L

Which of the following statements is true? 1mL = 1g 1g=1 oz 1mL=1 cm³ 1g=1 cm

Given the following reaction for photosynthesis: 6CO₂ + 6H₂O=C6H₁2O6+602 How many grams of C6H₁₂O6can be produced from 100 L of CO₂ at standard temperature and pressure? 134 grams 21.9 grams 43.7 grams 0.700 grams

A sample of a gas in a rigid container at 30.0°C and 2.00 atm has its temperature increased to 40.0. What will be the new pressure? 1.50 atm 2.67 atm 2.07 atm 6.04 atm

What is the formula for potassium oxide ? What is the formula for sodium iodide ? What is the formula for aluminum fluoride ? Use the References to access important values if needed for this question.

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHCgH4O4. This is often written in shorthand notation as KHP. If 4.72 grams of KHP are needed to exactly neutralize 28.9 mL of a barium hydroxide solution, what is the concentration of the base solution ? M barium hydroxide

Ammonia gas occupies a volume of 450 ml at a pressure of 700 mmHg. What volume will it occupy at standard pressure? (1 atm = 760 mmHg) ml. (round to nearest hundredth)

Why do you think the mayor says these lines at the end of "One of These Days"? The Mayor didn't look at him. He closed the door and said through the screen: "It's the same damn thing." None of the choices He is making peace with the dentist by reassuring him that he is loved in the town. He is making peace with the dentist by reassuring him that he will be paid. He is reminding the dentist that while the dentist may hold power in his office, the mayor holds power In the town.