General Questions and Answers

Soda should be banned from public schools because it is so unhealthy. A single can of Coca-Cola contains 140 calories.
Soda should be banned from public schools because, it is so unhealthy. However, a single can of Coca-
Cola contains 140 calories.
Soda should be banned from public schools, because it is so unhealthy. For instance, a single can of
Coca-Cola contains 140 calories.
Soda should be banned from public schools, because it is so unhealthy. For this reason, a single can of
Coca-Cola contains 140 calories.
None of the choices
Physical Chemistry
General
Soda should be banned from public schools because it is so unhealthy. A single can of Coca-Cola contains 140 calories. Soda should be banned from public schools because, it is so unhealthy. However, a single can of Coca- Cola contains 140 calories. Soda should be banned from public schools, because it is so unhealthy. For instance, a single can of Coca-Cola contains 140 calories. Soda should be banned from public schools, because it is so unhealthy. For this reason, a single can of Coca-Cola contains 140 calories. None of the choices
The opposite of a claim is a
plece of factual evidence
plece of anecdotal evidence
non-debatable statement
counterclaim
Physical Chemistry
General
The opposite of a claim is a plece of factual evidence plece of anecdotal evidence non-debatable statement counterclaim
This letter is to inform you that you must attend the upcoming workshop.
Rude
Commanding
Polite
Friendly
Physical Chemistry
General
This letter is to inform you that you must attend the upcoming workshop. Rude Commanding Polite Friendly
For which of the following reactions in forward direction entropy will decrease?
A. N204(g) → NO2(g)
B. CaCO3(s)-CaO(s) + CO₂(g)
C. S(s) + O2(g) → SO3 (g)
D. NH3(g)-N2(g) + H₂(g)
E. NaOH(s) - Na (aq) + OH(aq)
Physical Chemistry
General
For which of the following reactions in forward direction entropy will decrease? A. N204(g) → NO2(g) B. CaCO3(s)-CaO(s) + CO₂(g) C. S(s) + O2(g) → SO3 (g) D. NH3(g)-N2(g) + H₂(g) E. NaOH(s) - Na (aq) + OH(aq)
Classify the characteristics that make up Jazz.
"American Sound"
Born in the 1920's to 1930's
Uses highly syncopated rhythms and improvisation
All of the above
Physical Chemistry
General
Classify the characteristics that make up Jazz. "American Sound" Born in the 1920's to 1930's Uses highly syncopated rhythms and improvisation All of the above
Lying under oath is called
fibbing
perjury
bending the truth
creative speaking
Physical Chemistry
General
Lying under oath is called fibbing perjury bending the truth creative speaking
Enter the oxidation number of one atom of each element in each reactant and product.
CH₂(g) + 2O₂(g) →→→ CO₂(g) + 2 H₂O(g)
Which atom is oxidized?
Physical Chemistry
General
Enter the oxidation number of one atom of each element in each reactant and product. CH₂(g) + 2O₂(g) →→→ CO₂(g) + 2 H₂O(g) Which atom is oxidized?
Be sure to answer all parts.
Predict the shape, state the hybridization of the central atom, and give the ideal bond angle(s) and any expected deviations for ASCI.
Shape:
trigonal pyramidal
tetrahedral
Physical Chemistry
General
Be sure to answer all parts. Predict the shape, state the hybridization of the central atom, and give the ideal bond angle(s) and any expected deviations for ASCI. Shape: trigonal pyramidal tetrahedral
Determine the oxidation number for every element in the reaction. Draw arrows and indicate the
oxidation and reduction processes. Circle the oxidizing agent and underline the reducing agent.
2KMnO4 + 16HCl → 2KCI + 2MnCl₂ + 8H₂O + 5Cl₂
Physical Chemistry
General
Determine the oxidation number for every element in the reaction. Draw arrows and indicate the oxidation and reduction processes. Circle the oxidizing agent and underline the reducing agent. 2KMnO4 + 16HCl → 2KCI + 2MnCl₂ + 8H₂O + 5Cl₂
Please read this excerpt from an argumentative essay and continue to the question below.
The importance of learning Spanish is undeniable, in part, because it is so widely spoken. Today,
Spanish is spoken in more than twenty countries, adding up to almost 400 million Spanish speakers
worldwide. Some might argue that even more people speak Chinese-about 1025 million. However,
learning Spanish is easier for an English speaker, because the two languages are not so different.
What is the purpose of the last two sentences in this paragraph?
They present the thesis statement.
They introduce new evidence to support the thesis.
They address a counterclaim.
None of the choices
Physical Chemistry
General
Please read this excerpt from an argumentative essay and continue to the question below. The importance of learning Spanish is undeniable, in part, because it is so widely spoken. Today, Spanish is spoken in more than twenty countries, adding up to almost 400 million Spanish speakers worldwide. Some might argue that even more people speak Chinese-about 1025 million. However, learning Spanish is easier for an English speaker, because the two languages are not so different. What is the purpose of the last two sentences in this paragraph? They present the thesis statement. They introduce new evidence to support the thesis. They address a counterclaim. None of the choices
What is the form of government that splits its power geographically according to the rule that power resides in an alliance of independent states with a central government holding limited powers such as defense and foreign commerce?
Federal government
Unitary government
Confederate government
Oligarchy
Physical Chemistry
General
What is the form of government that splits its power geographically according to the rule that power resides in an alliance of independent states with a central government holding limited powers such as defense and foreign commerce? Federal government Unitary government Confederate government Oligarchy
Today's movie scores are examples of
absolute music
incidental music
concert overtures
preludes
Physical Chemistry
General
Today's movie scores are examples of absolute music incidental music concert overtures preludes
You are titrating 25.00 ml of 0.100 M HAC with 0.100 M KOH. What is the pH of
the solution after the addition of 28.40 ml of KOH? The pKa of the acid is 4.724.
A PH 8.75
pH 11.8
PH 10.2
 PH 9.50
 PH 11.3
Physical Chemistry
General
You are titrating 25.00 ml of 0.100 M HAC with 0.100 M KOH. What is the pH of the solution after the addition of 28.40 ml of KOH? The pKa of the acid is 4.724. A PH 8.75 pH 11.8 PH 10.2 PH 9.50 PH 11.3
What is the oxidation state of each element in Mn(NO3)₂?
Physical Chemistry
General
What is the oxidation state of each element in Mn(NO3)₂?
Complete and balance the precipitation reaction. Include physical states. Refer to the solubilities of common salts as needed.
precipitation reaction: CuCl₂ (aq) + Na₂CO3(aq) -
-
Physical Chemistry
General
Complete and balance the precipitation reaction. Include physical states. Refer to the solubilities of common salts as needed. precipitation reaction: CuCl₂ (aq) + Na₂CO3(aq) - -
What is the orbital hybridization of a central atom that has one lone pair and bonds to three other atoms?
sp
sp³
sp³d
sp³d²
Physical Chemistry
General
What is the orbital hybridization of a central atom that has one lone pair and bonds to three other atoms? sp sp³ sp³d sp³d²
Nitrogen monoxide reacts with oxygen to give nitrogen dioxide.
2 NO(g) + O₂(g) → 2 NO₂(g)
a. You wish to react NO and O₂ in the correct stoichiometric ratio. The sample of NO has a volume of 140. mL, What volume of O₂ is required (at the same
pressure and temperature)?
b. What volume of NO₂ (at the same pressure and temperature) is formed in this reaction?
Physical Chemistry
General
Nitrogen monoxide reacts with oxygen to give nitrogen dioxide. 2 NO(g) + O₂(g) → 2 NO₂(g) a. You wish to react NO and O₂ in the correct stoichiometric ratio. The sample of NO has a volume of 140. mL, What volume of O₂ is required (at the same pressure and temperature)? b. What volume of NO₂ (at the same pressure and temperature) is formed in this reaction?
Gaseous methane (CH) reacts with gaseous oxygen gas (0₂) to produce gaseous carbon dioxide (CO₂) and gaseous water (H₂O). Ir 3.33 g of water is produced from the reaction of 6.42 g of methane and 17.9 g of oxygen gas, calculate the percent yield of water. Round your answer to 3 significant figures.
Physical Chemistry
General
Gaseous methane (CH) reacts with gaseous oxygen gas (0₂) to produce gaseous carbon dioxide (CO₂) and gaseous water (H₂O). Ir 3.33 g of water is produced from the reaction of 6.42 g of methane and 17.9 g of oxygen gas, calculate the percent yield of water. Round your answer to 3 significant figures.
In some chemical reactions, electrons are transferred from one substance to another, but there is no net gain or loss of
electrons during the reaction. These reactions involve the oxidation, or loss of electrons, of one substance, and the reduction,
or gain of electrons, of another. This type of reaction is called a redox reaction.
In neutral atoms, such as A and X, the number of protons equals the number of electrons. When atom A loses an electron, the
positive charge of the nucleus becomes greater than the negative charge of the electrons, and the resulting ion has a net
positive charge, forming a cation. In a reaction, the electron must be taken up by another atom, X, which results in more
electrons than protons and a net negative charge on the atom, forming an anion.
Mnemonic devices can help in remembering the definitions of oxidation and reduction. Two common mnemonic devices are
• LEO (Losing Electrons: Oxidation) says GER (Gaining Electrons: Reduction), and
• OIL (Oxidation Is Losing) RIG (Reduction Is Gaining).
Identify the equations that show the oxidation of neutral atom A and the reduction of neutral atom X.
A+ A+ e
A- A++e-
AA+ e¯
AA+ e
X→ X+e™
X+ → X+e™
e¯+X→ X-
X + e → X
DO
Physical Chemistry
General
In some chemical reactions, electrons are transferred from one substance to another, but there is no net gain or loss of electrons during the reaction. These reactions involve the oxidation, or loss of electrons, of one substance, and the reduction, or gain of electrons, of another. This type of reaction is called a redox reaction. In neutral atoms, such as A and X, the number of protons equals the number of electrons. When atom A loses an electron, the positive charge of the nucleus becomes greater than the negative charge of the electrons, and the resulting ion has a net positive charge, forming a cation. In a reaction, the electron must be taken up by another atom, X, which results in more electrons than protons and a net negative charge on the atom, forming an anion. Mnemonic devices can help in remembering the definitions of oxidation and reduction. Two common mnemonic devices are • LEO (Losing Electrons: Oxidation) says GER (Gaining Electrons: Reduction), and • OIL (Oxidation Is Losing) RIG (Reduction Is Gaining). Identify the equations that show the oxidation of neutral atom A and the reduction of neutral atom X. A+ A+ e A- A++e- AA+ e¯ AA+ e X→ X+e™ X+ → X+e™ e¯+X→ X- X + e → X DO
Enter the net ionic equation for the reaction of AgNO3(aq) with K₂SO₂(aq). Include phases. Refer to the solubility rules as necessary.
Physical Chemistry
General
Enter the net ionic equation for the reaction of AgNO3(aq) with K₂SO₂(aq). Include phases. Refer to the solubility rules as necessary.
Using the procedure in Determination of an Equilibrium Constant, a student combines equimolar amounts of acetic acid and
ethanol to react as shown by the following equation.
acetic acid + ethanol ethyl acetate + water
To determine the initial concentration of acetic acid, 1.00 mL of the resulting mixture was titrated with 0.2205 M NaOH,
requiring 28.50 mL.
What is the molarity of the acetic acid?
Physical Chemistry
General
Using the procedure in Determination of an Equilibrium Constant, a student combines equimolar amounts of acetic acid and ethanol to react as shown by the following equation. acetic acid + ethanol ethyl acetate + water To determine the initial concentration of acetic acid, 1.00 mL of the resulting mixture was titrated with 0.2205 M NaOH, requiring 28.50 mL. What is the molarity of the acetic acid?
What is the formula for strontium oxide?
A. Sr0₂
B. Sr₂0₂
C. Sr₂0
D. Sro
Physical Chemistry
General
What is the formula for strontium oxide? A. Sr0₂ B. Sr₂0₂ C. Sr₂0 D. Sro
This author's definition of capitalism avoids class analysis and focuses on the history of capitalism
throughout the world.
Carl Marx
Joyce Appleby
James McCarthy
Joseph Stalin
Physical Chemistry
General
This author's definition of capitalism avoids class analysis and focuses on the history of capitalism throughout the world. Carl Marx Joyce Appleby James McCarthy Joseph Stalin
What is an invalid argument?
At least one premise is incorrect, and the conclusion does not follow the premise.
The conclusion follows the premises, but the premises are not true.
The premises may be true, but the conclusion does not follow them.
The premises and conclusion are true.
Physical Chemistry
General
What is an invalid argument? At least one premise is incorrect, and the conclusion does not follow the premise. The conclusion follows the premises, but the premises are not true. The premises may be true, but the conclusion does not follow them. The premises and conclusion are true.
You have a sample of CO₂ in flask A with a volume of 25.0 mL. At 15.8 °C, the pressure of the gas is 417.6 mm Hg. To find the volume of another flask, B. you move the CO₂ to that flask and find that its pressure is now 93.4 mm Hg at 24.0 °C. What is the volume of flask B?
Physical Chemistry
General
You have a sample of CO₂ in flask A with a volume of 25.0 mL. At 15.8 °C, the pressure of the gas is 417.6 mm Hg. To find the volume of another flask, B. you move the CO₂ to that flask and find that its pressure is now 93.4 mm Hg at 24.0 °C. What is the volume of flask B?
What word(s) signal(s) implicit reasoning?
If/Then
And
Whenever
Because
Physical Chemistry
General
What word(s) signal(s) implicit reasoning? If/Then And Whenever Because
What is the principle of limited government?
Individual liberty
Government dominance
Divine rights
All of the choices
Physical Chemistry
General
What is the principle of limited government? Individual liberty Government dominance Divine rights All of the choices
Complete and balance the precipitation reactions. Include physical states. Refer to the solubility rules as necessary.
precipitation reaction:
Ba(NO3)₂(aq) + CuSO4 (aq) →
precipitation reaction: K₂PO₂(aq) + MgCl₂(aq) ->
Physical Chemistry
General
Complete and balance the precipitation reactions. Include physical states. Refer to the solubility rules as necessary. precipitation reaction: Ba(NO3)₂(aq) + CuSO4 (aq) → precipitation reaction: K₂PO₂(aq) + MgCl₂(aq) ->
her hands, calling her at the same time a d--d b--h. After crossing her hands, a strong rope, and led her to a stool under a large hook in the joist, put in for the her get upon the stool, and tied her hands to the hook. She now stood fair for hi Her arms were stretched up at their full length, so that she stood upon the er then said to her, "Now, you d--d b--h, I'll learn you how to disobey my order up his sleeves, he commenced to lay on the heavy cowskin, and soon the war heart-rending shrieks from her, and horrid oaths from him) came dripping to terrified and horror-stricken at the sight, that I hid myself in a closet, and dared long after the bloody transaction was over. I expected it would be my turn ne me. I had never seen any thing like it before. I had always lived with my g outskirts of the plantation, where she was put to raise the children of the you therefore been, until now, out of the way of the bloody scenes that ofte plantation. What was the chief offense by Aunt Hester according to the master? 
Going out with Lloyd Ned
Being late to work
Eating too much
Resting for more hours
Physical Chemistry
General
her hands, calling her at the same time a d--d b--h. After crossing her hands, a strong rope, and led her to a stool under a large hook in the joist, put in for the her get upon the stool, and tied her hands to the hook. She now stood fair for hi Her arms were stretched up at their full length, so that she stood upon the er then said to her, "Now, you d--d b--h, I'll learn you how to disobey my order up his sleeves, he commenced to lay on the heavy cowskin, and soon the war heart-rending shrieks from her, and horrid oaths from him) came dripping to terrified and horror-stricken at the sight, that I hid myself in a closet, and dared long after the bloody transaction was over. I expected it would be my turn ne me. I had never seen any thing like it before. I had always lived with my g outskirts of the plantation, where she was put to raise the children of the you therefore been, until now, out of the way of the bloody scenes that ofte plantation. What was the chief offense by Aunt Hester according to the master? Going out with Lloyd Ned Being late to work Eating too much Resting for more hours
La donna é mobile is an aria composed by
Glacomo Puccini
Richard Wagner
 Gluseppe Verdi
Franz Liszt
Physical Chemistry
General
La donna é mobile is an aria composed by Glacomo Puccini Richard Wagner Gluseppe Verdi Franz Liszt
Among the four methods to propose and ratify an amendment to the Constitution, which one has been used in an overwhelming number of the 27 amendments enacted so far?
Two-thirds of the states call for a national convention to propose amendments and it is approved by three-fourths of the state legislatures.
An amendment is proposed by a two-thirds vote in each house of Congress and approved by three- fourths of the state legislatures.
Congress proposes an amendment and it is ratified by popular conventions in three quarters of the states.
Two-thirds of the states call for a national convention and it is approved by popular conventions in three-quarters of the states.
Physical Chemistry
General
Among the four methods to propose and ratify an amendment to the Constitution, which one has been used in an overwhelming number of the 27 amendments enacted so far? Two-thirds of the states call for a national convention to propose amendments and it is approved by three-fourths of the state legislatures. An amendment is proposed by a two-thirds vote in each house of Congress and approved by three- fourths of the state legislatures. Congress proposes an amendment and it is ratified by popular conventions in three quarters of the states. Two-thirds of the states call for a national convention and it is approved by popular conventions in three-quarters of the states.
Calculate the percent error value. Given the 1.00 gram sample of copper (II) carbonate, the reaction should have produced 0.64 grams of copper (II) oxide, CuO. However after conducting the lab it was discovered that 0.70 grams copper (II) oxide, CuO were produced. QUESTION 5: Calculate the percent error for this lab investigation.
Physical Chemistry
General
Calculate the percent error value. Given the 1.00 gram sample of copper (II) carbonate, the reaction should have produced 0.64 grams of copper (II) oxide, CuO. However after conducting the lab it was discovered that 0.70 grams copper (II) oxide, CuO were produced. QUESTION 5: Calculate the percent error for this lab investigation.
At what speed should a ball of mass 2 kg be rolled in order to reach the other side of a 6 m high slope?
12.52 m/s
13.25 m/s
10.84 m/s
15.64 m/s
Physical Chemistry
General
At what speed should a ball of mass 2 kg be rolled in order to reach the other side of a 6 m high slope? 12.52 m/s 13.25 m/s 10.84 m/s 15.64 m/s
Most Romantic program music was written for which musical forces?
Plano or Opera
Plano or Oratorio
Piano or solo violinist
Piano or Orchestra
Physical Chemistry
General
Most Romantic program music was written for which musical forces? Plano or Opera Plano or Oratorio Piano or solo violinist Piano or Orchestra
Who was the leading nationalistic composer in the United States during the Romantic period?
Peter Ilyich Tchaikovsky
Anton Dvořák
Bedřich Smetana
Louis Moreau Gottschalk
Physical Chemistry
General
Who was the leading nationalistic composer in the United States during the Romantic period? Peter Ilyich Tchaikovsky Anton Dvořák Bedřich Smetana Louis Moreau Gottschalk
Which of the following is NOT a factor of production?
Wind
Land
Labor
Capital
Physical Chemistry
General
Which of the following is NOT a factor of production? Wind Land Labor Capital
The best way to describe the fundamental meaning of "due process" is
the government must act fairly
the government must abide by the law, even if the law is unfair
the government may act unfairly while trying to enforce fair laws
the government must provide a defendant with a fair trial
Physical Chemistry
General
The best way to describe the fundamental meaning of "due process" is the government must act fairly the government must abide by the law, even if the law is unfair the government may act unfairly while trying to enforce fair laws the government must provide a defendant with a fair trial
A 5.6-mL sample of CO2 gas is enclosed in a gas-tight syringe at 17 °C. If the syringe is immersed in an ice bath (0 °C), what is the new gas volume, assuming that
the pressure is held constant?
Physical Chemistry
General
A 5.6-mL sample of CO2 gas is enclosed in a gas-tight syringe at 17 °C. If the syringe is immersed in an ice bath (0 °C), what is the new gas volume, assuming that the pressure is held constant?
Graphical aids provide information through
sketches
expert opinion statements
the author's guarantee
glossaries
Physical Chemistry
General
Graphical aids provide information through sketches expert opinion statements the author's guarantee glossaries
The person who uses a good or a service is known as a
producer
consumer
supplier
manufacturers
Physical Chemistry
General
The person who uses a good or a service is known as a producer consumer supplier manufacturers
How do printed features and illustrations aid the reader who is searching for specific information?
Such features always Identify the source of Information.
Such features are always developed by a team rather than by one person.
Such features are in a format that is grasped more quickly than a verbal explanation.
Such features are always printed in boldface.
Physical Chemistry
General
How do printed features and illustrations aid the reader who is searching for specific information? Such features always Identify the source of Information. Such features are always developed by a team rather than by one person. Such features are in a format that is grasped more quickly than a verbal explanation. Such features are always printed in boldface.
The U.S. Constitution establishes a of government.
federal system
confederate system
constitutional monarchy system
oligarchy system
Physical Chemistry
General
The U.S. Constitution establishes a of government. federal system confederate system constitutional monarchy system oligarchy system
My Activities Tell me what you Her arms were stretched up at their full length, so that she stood upon the ends of her toes. He then said to her, "Now, you d--d b--h, I'll learn you how to disobey my orders!" and after rolling up his sleeves, he commenced to lay on the heavy cowskin, and soon the warm, red blood (amid heart-rending shrieks from her, and horrid oaths from him) came dripping to the floor. I was so terrified and horror-stricken at the sight, that I hid myself in a closet, and dared not venture out till long after the bloody transaction was over. I expected it would be my turn next. It was all new to me. I had never seen any thing like it before. I had always lived with my grandmother on the outskirts of the plantation, where she was put to raise the children of the younger women. I had therefore been, until now, out of the way of the bloody scenes that often occurred on the plantation. Which of the following explains the fact the slaves were kept ignorant of their ages? 
If they know their age, they would most likely go on a strike and demand favors.
If they come to know their age, they would sue their masters to get them united with their parents.
The slaves were considered as property and not as persons.
This information would lead to the revelation of their ancestry which in turn would possibly facilitate their release.
Physical Chemistry
General
My Activities Tell me what you Her arms were stretched up at their full length, so that she stood upon the ends of her toes. He then said to her, "Now, you d--d b--h, I'll learn you how to disobey my orders!" and after rolling up his sleeves, he commenced to lay on the heavy cowskin, and soon the warm, red blood (amid heart-rending shrieks from her, and horrid oaths from him) came dripping to the floor. I was so terrified and horror-stricken at the sight, that I hid myself in a closet, and dared not venture out till long after the bloody transaction was over. I expected it would be my turn next. It was all new to me. I had never seen any thing like it before. I had always lived with my grandmother on the outskirts of the plantation, where she was put to raise the children of the younger women. I had therefore been, until now, out of the way of the bloody scenes that often occurred on the plantation. Which of the following explains the fact the slaves were kept ignorant of their ages? If they know their age, they would most likely go on a strike and demand favors. If they come to know their age, they would sue their masters to get them united with their parents. The slaves were considered as property and not as persons. This information would lead to the revelation of their ancestry which in turn would possibly facilitate their release.
What was the symphonic poem also known as?
Tone Poem
Mood Poem
Literary Poem
Program Poem
Physical Chemistry
General
What was the symphonic poem also known as? Tone Poem Mood Poem Literary Poem Program Poem
The point of view includes the author's participation as a character who narrates the story.
first person
second person
third person limited
third person objective
Physical Chemistry
General
The point of view includes the author's participation as a character who narrates the story. first person second person third person limited third person objective
Which of the following is not located in the Sun Belt?
Nebraska
Georgia
Arizona
Texas
Physical Chemistry
General
Which of the following is not located in the Sun Belt? Nebraska Georgia Arizona Texas
With respect to the slaves, when is a mother and her child separated?
Before the child has reached Its twelfth month
Before the child has reached five years of age
As soon as the child is born
Before the child has reached 10 years of age
Physical Chemistry
General
With respect to the slaves, when is a mother and her child separated? Before the child has reached Its twelfth month Before the child has reached five years of age As soon as the child is born Before the child has reached 10 years of age
Taxes on which of the following is an example of a selective sales tax?
Bicycle
Automobile
Gasoline
Bread
Physical Chemistry
General
Taxes on which of the following is an example of a selective sales tax? Bicycle Automobile Gasoline Bread
Read the following quote, and choose the correct answer..
Terry Brooks wrote "Who would you be but who you are?"
This quote can be best described as
Individualism
transcendentalism
romanticism
naturalism
Physical Chemistry
General
Read the following quote, and choose the correct answer.. Terry Brooks wrote "Who would you be but who you are?" This quote can be best described as Individualism transcendentalism romanticism naturalism
What is legal tender?
Only U.S. coins
Only U.S. paper money
Greenbacks
Any money a creditor, by law, must accept to pay a debt.
Physical Chemistry
General
What is legal tender? Only U.S. coins Only U.S. paper money Greenbacks Any money a creditor, by law, must accept to pay a debt.