stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Balanced Equation, Molar Mass & Mole Conversions Flashcards | StudBud
Explore
/
Balanced Equation, Molar Mass & Mole Conversions
Balanced Equation, Molar Mass & Mole Conversions
30 terms
·
StudBud Administration
·
816 plays
#balanced equations, #molar mass, # mass to mole conversions #chemistry review
Flashcards
30 cards
F
Practice quiz
P
Host live
L
Questions
30
Answers
1
What is the mass of 2.555 moles of iron (Fe)?
142.7 grams
112 grams
142.6890 grams
142.6 grams
2
Ca + H
2
O → Ca(OH)
2
+ H
2
What are the Ca(OH)
2
and H
2
called?
subscripts
reactants
products
coefficients
3
Determine the molar mass of this compound using masses from the periodic table: Na
2
CO
3
.
106.00 grams
109.588 grams
105.988 grams
106 grams
4
Determine the molar mass of this compound using masses from the periodic table: Ga(ClO
4
)
3
.
368.07 grams
368.070 grams
367 grams
368 grams
5
When one part of two different compounds swaps places to generate two new compounds, it is a ___ reaction.
synthesis
reduction - oxidation
double displacement
single displacement
6
Determine the Type of Reaction represented by this equation: BI
3
+ Na
2
O → B
2
O
3
+ NaI
decomposition
synthesis
double displacement
combustion
7
The mass of one mole of an element or a compound
mass number
molar mass
atomic number
Avogadro's number
8
When two or more smaller reactants are combined to create a larger product it is called a ___ reaction.
single displacement
acid - base
synthesis
combustion
9
Determine the Type of Reaction represented by this equation: Cu + S
8
→ Cu
2
S
synthesis
combustion
decomposition
single displacement
10
Ca + H
2
O → Ca(OH)
2
+ H
2
What are the substances on the left side of the arrow called?
coefficients
reactants
subscripts
products
11
Determine the Type of Reaction represented by this equation: C
4
H
10
+ O
2
→ CO
2
+ H
2
O
combustion
double displacement
synthesis
acid - base
12
Ca + H
2
O → Ca(OH)
2
+ H
2
What are the small 2's after the H's and (OH) called?
coefficients
reactants
subscripts
products
13
Unit of measure in chemistry to describe the amounts of substances and comparison of masses.
Avogadro's number
electronegativity
mole
molar mass
14
Determine the coefficients needed to balance this equation: __AlPO
4
+ __KNO
3
→ __K
3
PO
4
+ __ Al(NO
3
)
3
3, 3, 1, 1
1, 3, 1, 2
3, 1, 1, 3
1, 3, 1, 1
15
How much mass is 2.85178 moles of Al
2
(SO
4
)
3
equal to in grams?
975.719 grams
976 grams
969.7194 grams
975.72 grams
16
Use these formulas: 1. Sn
3
(PO
4
)
4
2. Li
2
SO
4
3. (NH
4
)
2
CO
3
Which substance has the most different elements in it?
They all have the same number of elements
3
1
2
17
The total atoms in the reactants must be equal to the total atoms in the products demonstrates what concept?
molar mass
law of conservation of matter
Avogadro's rule
octet rule
18
Use these formulas: 1. Sn
3
(PO
4
)
4
2. Li
2
SO
4
3. (NH
4
)
2
CO
3
How many atoms are in formula #1 ?
19
12
11
23
19
What is the mass of 3.033 moles of Bromine gas, Br
2
?
484.6 grams
485 grams
480 grams
484.7 grams
20
How many moles of KBr are in 500. grams of KBr?
4.2016 moles
4.20moles
4.201610 moles
4.21 moles
21
Organic compounds used for fuels in combustion reactions, that contain mostly hydrogen and carbon atoms?
ethanol
hydrocarbons
fossil fuels
carbohydrates
22
Determine the Type of Reaction represented by this equation: Sr(OH)
2
+ Ca → Ca(OH)
2
+ Sr
combustion
double displacement
decomposition
single displacement
23
Given that KBr has a molar mass of 119.002 grams, how many grams are in 6.661 moles of KBr?
792.6 grams
792.7 grams
792.672322 grams
792.67 grams
24
Use these formulas to answer this question: 1. Sn
3
(PO
4
)
4
2. Li
2
SO
4
3. (NH
4
)
2
CO
3
How many total oxygen atoms?
15
27
11
23
25
Which substance(s) need a coefficient of 2 to make it balanced? Ca + H
2
O → Ca(OH)
2
+ H
2
Calcium hydroxide
Calcium
Water
Hydrogen gas
26
Determine the coefficients needed to balance this equation: __BI
3
+ __Na
2
O → __ B
2
O
3
+ __NaI
2, 3, 1, 2
1, 3, 1, 3
2, 3, 1, 6
3, 1, 1, 3
27
When a hydrocarbon reacts with oxygen and a spark to yield both water and carbon dioxide
single displacement
double displacement
decomposition
combustion
28
What is the mass of one mole of pure gold atoms (Au)?
197 grams
6.02 x 1023 grams
196.97 grams
79 grams
29
Determine the Type of Reaction represented by this equation: KMnO
4
→ K + Mn + O
2
synthesis
acid - base
decomposition
single displacement
30
When one element switches places with an element that is in a compound it is called a ___ reaction.
single displacement
synthesis
combustion
decomposition
