Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

1. A Revisão Vestibular UFRGS Simulados > Teste Ia > Flashcards

Teste Ia Flashcards

You may prefer our related Brainscape-certified flashcards:
Preparativo Vestibular e ENEM flashcards
1
Q

What is the chemical formula for water?

A

H2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

True or False: The pH scale ranges from 0 to 14.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Fill in the blank: The process of a solid turning directly into a gas is called _______.

A

sublimation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the main gas produced during cellular respiration?

A

Carbon dioxide (CO2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which element has the atomic number 6?

A

Carbon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the term for a substance that increases the rate of a chemical reaction without being consumed?

A

Catalyst

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

True or False: Acids have a pH less than 7.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the name of the process by which plants convert sunlight into chemical energy?

A

Photosynthesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which gas is commonly known as laughing gas?

A

Nitrous oxide (N2O)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Fill in the blank: The __________ is the smallest unit of an element that retains the properties of that element.

A

atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What type of bond involves the sharing of electron pairs between atoms?

A

Covalent bond

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the molar mass of carbon dioxide (CO2)?

A

44 g/mol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which type of reaction involves a substance breaking down into simpler substances?

A

Decomposition reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

True or False: All chemical reactions involve a change in energy.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the primary component of natural gas?

A

Methane (CH4)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Fill in the blank: The __________ law states that mass is neither created nor destroyed in a chemical reaction.

A

law of conservation of mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the term for the amount of solute that can dissolve in a given amount of solvent at a specific temperature?

A

Solubility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Which element is represented by the symbol ‘Na’?

A

Sodium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the difference between an ionic bond and a covalent bond?

A

Ionic bonds involve the transfer of electrons, while covalent bonds involve sharing electrons.

20
Q

True or False: Noble gases are highly reactive.

A

False

21
Q

What is the term for a solution that contains more solute than it can theoretically hold at a given temperature?

A

Supersaturated solution

22
Q

Which acid is commonly found in vinegar?

A

Acetic acid (CH3COOH)

23
Q

Fill in the blank: The __________ is a measure of the concentration of hydrogen ions in a solution.

A

pH

24
Q

What is the primary purpose of a buffer in a chemical system?

A

To maintain a stable pH

25
Q

Which type of reaction occurs when an acid and a base react to form water and a salt?

A

Neutralization reaction

26
Q

What is the term for the energy required to initiate a chemical reaction?

A

Activation energy

27
Q

True or False: The atomic number of an element is equal to the number of protons in its nucleus.

A

True

28
Q

What is the most abundant gas in the Earth’s atmosphere?

A

Nitrogen (N2)

29
Q

Fill in the blank: A __________ is a substance that donates protons (H+) in a chemical reaction.

A

Bronsted acid

30
Q

What is the term for the process of a liquid turning into a gas?

A

Evaporation

31
Q

Which element is a liquid at room temperature?

A

Bromine (Br)

32
Q

What is the chemical formula for table salt?

A

NaCl

33
Q

True or False: All metals are good conductors of electricity.

A

False

34
Q

What is the process by which a gas turns into a liquid?

A

Condensation

35
Q

Fill in the blank: The __________ is the part of the atom that contains protons and neutrons.

A

nucleus

36
Q

What is the term for the temperature at which a liquid turns into a gas?

A

Boiling point

37
Q

Which type of radiation has the highest energy?

A

Gamma radiation

38
Q

What is the principle behind chromatography?

A

Separation of components based on their movement through a medium

39
Q

True or False: A strong acid completely dissociates in water.

A

True

40
Q

What is the molecular formula for glucose?

A

C6H12O6

41
Q

Fill in the blank: The __________ is the measure of the randomness or disorder of a system.

A

entropy

42
Q

What is the term for the energy stored in chemical bonds?

A

Chemical potential energy

43
Q

Which type of bond is formed by the attraction between positively and negatively charged ions?

A

Ionic bond

44
Q

What is the significance of the periodic table?

A

It organizes elements based on their properties and atomic structure.

45
Q

True or False: Isotopes of an element have the same number of neutrons.

A

False

46
Q

What is the term for the amount of heat energy required to raise the temperature of 1 gram of a substance by 1 degree Celsius?

A

Specific heat capacity

1. A Revisão Vestibular UFRGS Simulados (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions