Introduction To Chemistry Quiz For Students

Reviewed by Zohra Sattar Waxali
Zohra Sattar Waxali, PhD (Chemistry) |
Chemistry
Review Board Member
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products.
, PhD (Chemistry)
By Harry Brielmann
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Harry Brielmann
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1. Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. is the _____ formula for water.

Explanation

Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. is the molecular formula for water. Note that it does not show how the atoms are arranged in space- for that you need the structural formula.
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About This Quiz
Introduction To Chemistry Quiz For Students - Quiz

Welcome to our Introduction to Chemistry Quiz! Dive into the fascinating world of chemistry and test your understanding of fundamental concepts. Whether you're just starting your journey or... see morelooking to refresh your knowledge, this quiz is perfect for beginners and enthusiasts alike.

Explore the basics of atoms, elements, compounds, and chemical reactions through a series of engaging questions designed to challenge and educate. From understanding the periodic table to grasping the principles of bonding and molecular structure, this quiz covers essential topics to lay a strong foundation in chemistry.

Each question is crafted to provide insight and clarity, ensuring a rewarding learning experience. So, if you're ready to embark on a journey of discovery and unlock the secrets of the molecular world, take our Introduction to Chemistry Quiz today! Test your knowledge, expand your understanding, and ignite your passion for science.
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2. What happens when you expose Sodium to water?

Explanation

When sodium is exposed to water, it undergoes a highly exothermic reaction, meaning it releases a large amount of heat. This reaction is so vigorous that it can cause the sodium to ignite, producing a bright flame. Additionally, hydrogen gas is rapidly produced during this reaction, which often leads to the formation of bubbles. The resulting solution contains sodium hydroxide (NaOH), a strong base.



The chemical equation for this reaction is:



2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)



This reaction demonstrates the high reactivity of sodium with water due to its position in the periodic table and its tendency to lose electrons easily. It also serves as a cautionary example of the dangers associated with handling reactive metals such as sodium in the presence of water or moisture.

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3. What do chemists do? Please choose the best answer

Explanation

Since chemistry is the study of matter and how it changes, chemists do exactly that. Some of the other answers are true but are examples of what a chemist may do, not what he or she does overall.

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4. Which of the following is an example of matter?

Explanation

 A rock has a definite mass and takes up space, so it is a form of matter.

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5. Which one of the following is an example of a physical property?

Explanation

A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical composition. In the case of ice floating on liquid water, this is an example of a physical property known as density. Ice has a lower density than liquid water, which causes it to float.

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6. What do all chemists do?

Explanation

Since chemistry is the study of matter and how it changes, all chemists study matter. They may only study gold for example, which is not an element of life. They may be physical chemists, meaning they have no need to mix chemicals. Hopefully very few of them smoke cigarettes

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7. All of the following are properties of tin.  Which one is a chemical property of tin?

Explanation

A chemical property of a substance describes its behavior in chemical reactions or interactions with other substances, resulting in a change in its chemical composition. In the case of tin eroding when added to hydrochloric acid and forming a clear gas (likely hydrogen gas), this demonstrates a chemical change in the tin, indicating a chemical property.

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8. How many bonds does oxygen typically form?

Explanation

Oxygen typically forms 2 bonds. The mnemonic "HONC if you love chemistry" may help you remember the number of bonds for each of the four most common elements of life: H1, O2, N3, and C4.

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9. What is chemistry?

Explanation

chemistry is the study of matter and how it changes.

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10. The field of natural products is a branch of chemistry that focuses on those substances that are not man-made but rather exist in the natural world.

Explanation

The field of natural products is a branch of chemistry that focuses on those substances that are never exclusively man-made but rather exist in the natural world and how these substances can be applied to real-world problems.

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11. Which of the following is not an example of matter?

Explanation

Energy does not take up space and does not have mass, so it is not matter.

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12. Watson and Crick determined that all living things have DNA molecules in each cell. Based on this, what types of chemists are Watson and Crick?

Explanation

Although Watson, Crick and Franklin used all branches of chemistry in their discovery (for example Franklin was an expert analytical chemist, relying on x-ray crystallography), they were acting as biochemists when they determined a molecule common to all living things.

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13. What is the structural formula for water? Please choose the closest answer

Explanation

Water has a molecular formula of Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.. Since hydrogen forms a single bond, and oxygen prefers to form two bonds, the most reasonable structural formula is H-O-H. Note that this shows each hydrogen atom with one bond, and oxygen with two bonds.

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14. How many bonds does carbon typically form?

Explanation

Carbon typically forms 4 bonds. The mnemonic "HONC if you love chemistry" may help you remember the number of bonds for each of the four most common elements of life: H1, O2, N3, and C4.

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15. What is wrong with the substance Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Explanation

The substance Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. is unlikely to exist since carbon can only form four bonds; CH4 is a common substance known as methane. There are no isomers for CH5 since it does not exist.

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16. A chemist walks into his laboratory, and using a device known as a mass spectrometer, determines the structure of a substance he is interested in.  He then performs medical tests on the substance to see if it has potential as an experimental medicine. In chronological order, what two types of chemists did he behave as?

Explanation

He is an analytical chemist when analyzing his substance, and medicinal chemist when testing it medically

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17. How many bonds does hydrogen typically form?

Explanation

Hydrogen typically forms 1 bond. The mnemonic "HONC if you love chemistry" may help you remember the number of bonds for each of the four most common elements of life: H1, O2, N3, and C4.

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18. H-O-H is an example of a ________ formula

Explanation

H-O-H is the structural formula for water. Note that it provides the bonding arrangement for the molecular formula for water (Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.)

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19. Which of the following processes demonstrates a physical property?

Explanation

All involve a chemical change to form new substances except boiling water, which remains as water, just in the gaseous form

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20. How many bonds does nitrogen typically form?

Explanation

Nitrogen typically forms 3 bonds. The mnemonic "HONC if you love chemistry" may help you remember the number of bonds for each of the four most common elements of life: H1, O2, N3, and C4.

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21. Substance A has a molecular formula of Syntax error from line 1 column 55 to line 1 column 96. Unexpected '<mi '. and substance B has a molecular formula of Syntax error from line 1 column 55 to line 1 column 96. Unexpected '<mi '.What is the relationship between substance A and substance B?

Explanation

Substances A and B cannot be isomers because they have different molecular formulas. Isomers have the same molecular formulas but different arrangements of the atoms.

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22. A seven carbon alcohol would be called

Explanation

heptan for seven carbons , ol for alcohol. If it has "en" in it a double bond is also present

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23. What is matter?

Explanation

Matter is defined as anything that has mass and takes up space. Note the only reason to include the volume (taking up space) requirement is for oddball situations that may be hypothetical only such as a black hole (all mass and no volume) or a perfect vacuum (volume but no mass). Most chemists might think that all matter is important, but that's just an opinion.

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24. Polymer chemists investigate the extremely long repeating chains of molecules known as polymers, also commonly known as

Explanation

Long repeating chains of molecules are known as polymers, commonly known as plastics. They are usually organic, such as nylon or polypropylene. 

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25. Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Explanation

Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.is the molecular formula for ethanol. This means that a molecule for ethanol has two carbon atoms, six hydrogen atoms, and one oxygen atom. However, it does not tell us how those molecules are collected- for that we need a structural formula. It does tell us that those nine atoms are bonded together to form a single substance. 
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26. Match the following
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27. What is the relationship between the two substances shown below?

Explanation

The two substances are isomers since they both have a molecular formula of Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. but the the structural formulas are different- note how the "OH" group (known as a hydroxyl group) is on the end of one and in the center of the other isomer.

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28. Name the organic functional group in the substance below

Explanation

a C=C bond is an alkene

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29. The study of how matter changes generally refers to the __________study of matter.

Explanation

Scientists define chemistry as the study of matter and how it changes to emphasize both the physical study of matter (not changing its structure) as well as the chemical study of matter - converting it into other substances. By changing matter we are not converting it into other elements or energy, we are simply rearranging the atoms we start with- this is a chemical change. Converting one element such as hydrogen into another element such as helium (which liberates huge amounts of energy) is a nuclear process, not a chemical process.

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30. Choose the response that includes all the items listed below that are pure substances.             1. orange juice    2. blood    3. ocean water    4. oxygen    5. vegetable soup

Explanation

Only oxygen is a pure substance. Orange juice has water, vitamin C, etc. Blood has water, red blood cells, hemoglobin, etc. The ocean has salt, water, fish, and vegetable soup, which has lots of yummy things in it.

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31. What is the relationship between the two substances shown below?  

Explanation

The two molecules are isomers: they have the same molecular formulas but different physical arrangements and connectivity.

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32. Which of the following is true about Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Explanation

This is a molecular formula since the bonds are not explicitly shown. It is an organic substance since it contains carbon. Note that in this particular case, only one isomer is possible. Often, a molecular formula can be the basis for multiple isomers, but in this case, it can only be assembled one way while maintaining four bonds for carbon, two for oxygen, and one for each hydrogen:

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33. In order, what are the four numbers below needed to balance the chemical equation?

Explanation

The numbers needed to balance a chemical equation represent the coefficients of the compounds involved. In this case, the equation requires 1 molecule of the first compound, 3 molecules of the second compound, 2 molecules of the third compound, and 3 molecules of the fourth compound to achieve balance. These coefficients ensure that the number of atoms of each element is the same on both sides of the equation.

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34. Name the organic functional group in the substance below

Explanation

this substance is 1-butene. It contains the alkane (single bonded carbon) and alkene (double bonded carbon) functional groups

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35. A tentative explanation for a set of observations that can be tested by further experimentation is referred to as

Explanation

A hypothesis is a proposed explanation for a phenomenon or a set of observations that can be tested through further experimentation or investigation. It is often formulated based on existing knowledge or observations and serves as a tentative solution to a scientific question or problem.

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36. Patient A receives an experimental medicine. Patient B receives aspirin. Patient C receives a pill that contains only starch. Which of the following are true?

Explanation

Patient B received a positive control (aspirin), and Patient C received a negative control (a placebo)

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37. Magnesium hydroxide, present in milk of magnesia, has a molecular formula of Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '., therefore each molecule of magnesium hydroxide contains ____ magnesium atom(s).  

Explanation

Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. refers to magnesium hydroxide, and it means that each molecule of magnesium hydroxide has one magnesium atom, two oxygen atoms, and two hydrogen atoms
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38. In order, what are the four numbers below needed to balance the chemical equation? _ _ _ C subscript 2 H subscript 6 space space plus space space _ _ _ O subscript 2 space space space rightwards arrow space space space _ _ _ C O subscript 2 space space plus space space _ _ _ H subscript 2 O

Explanation

The four numbers needed to balance the chemical equation are 2, 7, 4, and 6. Balancing a chemical equation involves ensuring that the number of atoms of each element is the same on both sides of the equation. The numbers represent the coefficients that are multiplied with the respective molecules or compounds in the equation to achieve this balance.

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39. Scientists use chemistry to provide ____________ answers to problems, which arguably provide the deepest answers to many problems.

Explanation

A molecular answer to a problem is often full of useful information, since from that structure one can determine physical and chemical answers, and with that foundation, biological or even psychological answers, for example, follow. A chemical structure is often the root answer to any matter-based topic. Otherwise known as practical problems.

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40. Which fields are considered pre-requisite to chemistry, meaning that they provide a foundation for studying chemistry, also meaning that they are a more basic, less applied field of study than chemistry?

Explanation

Chemistry is the central science and some foundational, prerequisite fields for chemistry include math and physics. More applied fields include biology and the social sciences, such as psychology and anthropology.

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41. Which of the following substances are organic? a. NaCl, commonly known as table salt b. Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '., commonly known as methane c. Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '., commonly known as sulfuric acid d. Au, commonly known as gold e. Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '., which may be ethanol or dimethyl ether, depending on the isomer

Explanation

Substances B and E are organic since they contain carbon. Either isomer for E is organic since both contain carbon. This question is using the scientific meaning of the term organic.

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42. Name the substance below

Explanation

This is a four carbon alcohol so the name is butanol.

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43. The formula for butane is

Explanation

Butane is a four-carbon alkane with a formula of C4H10. Butane is an alkane, belonging to the family of saturated hydrocarbons. This means that its carbon atoms are bonded together by single covalent bonds, and each carbon atom forms four single bonds with hydrogen atoms, satisfying the octet rule.

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44. match the word with the type of chemist 

Explanation

This question shows how the type of chemist is really given away by the word
For example
physical chemists are interested in physical, not chemical processes
analytical chemists analyze substances
synthetic chemicical perfrom chemical reactions; they synthesize
polymers are plastics
carbon-based chemistry is organic chemistry

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45. What is a chemical?

Explanation

Chemists use a very broad definition of a chemical: it is a pure form of matter,also known as a substance. It does not have to be toxic or dangerous, although in common usage it may have that connotation. It can be a single element such as gold, or a combination of elements such as methane. However those atoms must be bonded together to form a single substance: a chemical is a pure form of matter, not a mixture.

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46. The two substances shown below, in fact are identical.

Explanation

Rotating these molecules reveals that they are not the same compound. They differ in their 3D arrangement and are mirror images of each other, making them enantiomers. 

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47. Name the organic functional group in the substance below

Explanation

a carbonyl group (C=O) with carbons on either side is a ketone

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48. What is a substance?

Explanation

A substance is a pure form of matter. It may be a single element or atom (in which case there are no bonds), it cannot be a mixture.

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49. Which of the following compounds has only single bonds?

Explanation

The compound C7H16 has only single bonds. This can be determined by the molecular formula, which shows that there are 7 carbon atoms and 16 hydrogen atoms. In order for all the atoms to have a complete octet, each carbon atom must form 4 bonds, and each hydrogen atom must form 1 bond. Since there are no other elements or functional groups present in the compound, all the bonds must be single bonds.

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50. The substance below includes which functional group?

Explanation

Only the ether (an oxygen atom with carbons on either side is present. No alcohol (OH), alkyne (triple bond), or aldehyde (C=O with a hydrogen on one side) is present

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51. Name the organic functional group which is present in the substance below

Explanation

this substance contains alkenes and an obscure functional group called an imine (C=N).

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52. Name the organic functional group in the substance below

Explanation

a carbonyl group (C=O) connected to an oxygen is an ester.

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53. Which of the following is the correct formula for propene?

Explanation

The correct formula for propene is C3H6. Propene is an unsaturated hydrocarbon with three carbon atoms and six hydrogen atoms. It is an alkene, which means it contains a double bond between two carbon atoms. The formula C3H6 accurately represents the molecular structure of propene.

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54. Name the organic functional group in the substance below

Explanation

Note the carbonyl group with a hydrogen at the end of the chain...this is an aldehyde

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55. What is the relationship between substances A and B shown below?

Explanation

All of the substance contain carbon-carbon single bonds (alkanes), carbon-carbon double bonds (alkenes), and esters, (a C=0 with an oxygen also attached to the carbon). No ethers, ketones, or other functional groups are present.

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56. True or false: The balanced chemical equation for the combustion of propene is C subscript 2 H subscript 4 space space plus space 3 space O subscript 2 space space space rightwards arrow space space space 2 C O subscript 2 space space plus space space 2 H subscript 2 O

Explanation

propene has three carbons atoms; the substance listed is ethylene

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57. Which functional group is not present in the cocaine structure shown below?

Explanation

an aldehyde group is a carbonyl group (C=O) connected to a hydrogen atom. It isn't there.

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58. Which functional groups are common to all of the substances below

Explanation

All of the substances contain carbon-carbon single bonds (alkanes), carbon-carbon double bonds (alkenes), and esters, (a C=0 with an oxygen also attached to the carbon). No ethers, ketones, or other functional groups are present.

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59. What is the molecular formula of the substance below?
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Zohra Sattar Waxali |PhD (Chemistry) |
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Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products.

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 is the _____ formula for water.
What happens when you expose Sodium to water?
What do chemists do? Please choose the best answer
Which of the following is an example of matter?
Which one of the following is an example of a physical property?
What do all chemists do?
All of the following are properties of tin.  Which one is a...
How many bonds does oxygen typically form?
What is chemistry?
The field of natural products is a branch of chemistry that focuses on...
Which of the following is not an example of matter?
Watson and Crick determined that all living things have DNA molecules...
What is the structural formula for water? Please choose the closest...
How many bonds does carbon typically form?
What is wrong with the substance 
A chemist walks into his laboratory, and using a device known as a...
How many bonds does hydrogen typically form?
H-O-H is an example of a ________ formula
Which of the following processes demonstrates a physical...
How many bonds does nitrogen typically form?
Substance A has a molecular formula of  and substance B has a...
A seven carbon alcohol would be called
What is matter?
Polymer chemists investigate the extremely long repeating chains of...
Match the following
What is the relationship between the two substances shown below?
Name the organic functional group in the substance below
The study of how matter changes generally refers to the...
Choose the response that includes all the items listed below that are...
What is the relationship between the two substances shown below? ...
Which of the following is true about 
In order, what are the four numbers below needed to balance the...
Name the organic functional group in the substance below
A tentative explanation for a set of observations that can be tested...
Patient A receives an experimental medicine. Patient B receives...
Magnesium hydroxide, present in milk of magnesia, has a molecular...
In order, what are the four numbers below needed to balance the...
Scientists use chemistry to provide ____________ answers to problems,...
Which fields are considered pre-requisite to chemistry, meaning that...
Which of the following substances are organic? ...
Name the substance below
The formula for butane is
Match the word with the type of chemist 
What is a chemical?
The two substances shown below, in fact are identical.
Name the organic functional group in the substance below
What is a substance?
Which of the following compounds has only single bonds?
The substance below includes which functional group?
Name the organic functional group which is present in the substance...
Name the organic functional group in the substance below
Which of the following is the correct formula for propene?
Name the organic functional group in the substance below
What is the relationship between substances A and B shown below?
True or false: The balanced chemical equation for the combustion of...
Which functional group is not present in the cocaine structure shown...
Which functional groups are common to all of the substances below
What is the molecular formula of the substance below?
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