Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry > Chemistry mass practice questions > Flashcards

Chemistry mass practice questions Flashcards

1
Q

What is considered the universal solvent?

A

water

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

What are the letter shells corresponding to 1,2,3,4 energy levels? How many electrons can they hold?

A
  • K-2
  • L-8
  • M-18
  • N-32
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What type of cmpd has an oxygen mlc linking 2 hydrocarbons

A

ether

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

Aldehydes and ketones contain what type of functional group?

A

carbonyl (C=O)

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

Alcohol contains what type of functional group?

A

hydroxyl (-OH)

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

What compound has a nitrogen atom with a lone pair of electrons that is bound to one or more hydrocarbons

A

amines

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

What are 3 other extensive properties I didn’t learn from notes?

A
  • entropy
  • number of moles
  • electrical charge
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is 1 other intensive property i didn’t learn about in my notes?

A

temperature

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

An object that changes color in the prescence of hydrogen or hydronium ions is said to be what?

A

halochromic

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

What type of materials change in color in the presence of pressure?

A

piezochromic

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

bioluminescence is a form of what?

A

chemiluminescence

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

What type of compounds are salts? What are the examples i learned about for ____ rxns?

A
  • ionic cmpds
  • neutralization rxns

Examples
* NaHSO4 - sodium bisulfate
* K2Cr2O7- potassium dichromate
* CaCl2- calcium chloride
* NaNO3/ KNO3 - in fertilizer
* MgSO4- epsom salt

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

What type of structure does a solid form?

A

lattice structure

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

Which of the following best describe oxygen with 8 protons, 10 electrons and 8 neutrons?
* oxygen isotope with a atomic mass of 2
* oxygen as an isotope with an atomic mass of 16
* oxygen as an anion with a -2 charge
* oxygen as a cation with a -2 charge

A

C
* charge = protons + electrons
* mass= protons + neutrons

isotope has DIFF NUMBER OF NEUTRONS, and so mass number

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

As you go from pH 7 to pH 1, what is happening to the strength of the ___?

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

As you go from pH 7 to pH 14, what is happening to the strength of the ___?

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

What number on the pH scale is HCl?

A

1

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

What are additional examples of homogenous mixtures besides salt water and sln?

A

milk, air, blood, black coffee

19
Q

What are additional examples of heterogenous mixtures besides oil and water?

A

pizza and tea with boba

20
Q

He has a higher IE than fluorine. T or F

A

true based on periodic table trend of IE

21
Q

What is the MOST EN atom?

22
Q

A synthesis / combination reaction ALWAYS has how many products?

23
Q

Metals tend to ___ electrons because _____

A
  • lose
  • they have fewer electrons in their outer/ valence shell to begin with
24
Q

Non-metals tend to ___ electrons because _____

A
  • gain
  • they have more electrons in their outer/ valence shell to begin with so easier to gain than lose electrons to get full valence shell of 8 to meet octet rule to be like the nearest noble gas
25
What type of bond is CCl4 with C EN being 3.0 and Cl being 2.5
3.0-2.5 = 0.5 so is a POLAR COVALENT BOND.
26
What is the **average** number of neutrons in a Bromine atom?
44.9 * neutrons = mass # (tho NOT rounding the atomic mass) - # of protons * 79.9- 35 = 49.9
27
What is the number of neutrons in a Bromine atom?
* neutrons = mass # - # of protons * 80-35=**40**
28
What is the SI unit of mass?
kg
29
Matter exists in how many states?
4 * S, L, G, and plasma (least common)
30
What are new definitions of mass and volume i learned?
* mass: the **number** of mlcs in an obj * volume: the amount of **space** the mlcs in an obj occupt
31
matter is made up of atoms and also what?
mlcs
32
matter can exist in ___ states depending on the ____
* different * environment
33
What is the correct conjugate acid for NH3?
NH4+ (ammonium)- a weak acid
34
What are two elemenets that **DO NOT** follow the octet rule? Instead what rule do they follow? What does that rule say?
* H and He * DUET rule * only need 2 electrons in valence/ outer shell.
35
What are some pieces of evidence that a **chemical reaction** has taken place?
* color change * release of light * formation of a solid precipitate * formation of gas (ie. bubbles) * change in temperature * change in chemical composition/ chemical identity
36
Dipole always points towards the ___ EN atom
MORE
37
Balance the following chemical equation C2H6 + O2 --> CO2 + H2O
2,7,4,6 | when original Coeff dont work **x2** the ones i have
38
What elements should be balanced last?
O and H
39
Balance the following chemical equation Ca3N2 + H2O --> Ca (OH)2 + NH3
1,6,3,2 | lesson: parenthesis = distribute to atoms
40
What is the correct number of protons, neutrons, and electrons for the given isotope? 16 O -2 8
* protons = atomic number = **8** * neutrons = mass number - number of protons = 16-8= **8** * electrons [ protons + electrons = charge], so 8+ _ = -2 ; **-10**
41
How many protons, neutrons, and electrons does Al ion with a 3+ charge have?
* protons = atomic number = **13** * neutrons = mass # - # of protons = 27-13= **14** * electrons [ protons + electrons = charge], so 13 + _ = +3; -10, so **10 electrons**
42
If more energy is required to remove a valence electron from an atom, then the IE ____
increases
43
* Items that are ___ dense than water will float in water * What is the normal density of pure water?
* less * 1 g/ cm^3
44
What has **no definite shape or volume** and is an **excellent conductor of electricity**?
plasma (similar to gas) (plasma is also affected by magnetic fields)

Chemistry (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions