stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Study for Quiz #6 Flashcards | StudBud
Explore
/
Study for Quiz #6
Study for Quiz #6
29 terms
·
StudBud Administration
·
105 plays
Use this Quiz to study all about chemical reactions, balancing equations, and stoichiometry!
Flashcards
29 cards
F
Practice quiz
P
Host live
L
Questions
29
Answers
1
How are photosynthesis and cellular respiration similar?
They both use Oxygen as a reactant.
The products of photosynthesis are the reactants of cell res
They both produce sugar.
They are not at all similar.
2
In this equation, how many oxygen
molecules
are in the reactants?
4
9
0
2
3
What are the reactants in the photosynthesis equation?
sugar and oxygen
carbon dioxide and water
carbon and hydrogen
water and sugar
4
What is Avogadro's number?
602 sextillion particles
6.02 x 1023 particles
All the above are correct!
How many particles in a mole.
5
When a compound decomposes or "breaks apart" into two other substances, this is a ___ reaction.
single displacement reaction
decomposition reaction
double displacement reaction
synthesis reaction
6
When the elements in two compounds "swap partners," this is a _________ reaction.
synthesis reaction
double replacement (displacement) reaction.
combustion reaction
single replacement (displacement) reaction
7
In the equation 4Fe + 3 O
2
--> 2Fe
2
O
3
, what is the ratio of oxygen to iron?
2 over 4
3 over 4
4 over 3
4 over 2
8
If I have 300 g of Ca(NO
3
)
2
, how many moles will that be?
2.6 mol
0.55 mol
1.83 mol
0.25 mol
9
How did you see the definition of chemistry in the Phenol Red lab?
The chemicals mixed and got hot.
The phenol red changed to yellow.
A new substance was created: CO2!
Signs of chemical reactions: heat and color change
10
What is the definition of chemistry we have used in class? "Chemistry is the study of..."
...how chemicals react, with heat and color changes.
...what substances are made of and how new ones are formed.
...chemicals in the universe.
...chemicals and chemical reactions.
11
In this reaction, an element "takes away" a part of a compound and leaves another element alone
double displacement reaction
Single displacement reaction
synthesis reaction
combustion reaction
12
What reactant do you HAVE to have in a combustion reaction?
Carbon Dioxide
Sugar
Oxygen
Water
13
Calculate the molar mass for Si(OH)
4
96 grams per mol
48 grams per mol
45 grams per mol
180 grams per mol
14
What is a mole, in chemistry?
a brown wart on your face
a little furry animal
602 sextillion particles of a substance.
1 chemical in a reaction.
15
Calculate the molar mass for Ca(NO
3
)
2
Please round to whole number.
164 grams per mol
70 grams per mol
132 grams per mol
28 grams per mol
16
In the equation, if you have 28 g of sugar, how many grams of water will you make? (Hon. Chem)
2.8 grams of water
24 grams of water
0.006 grams of water
28 grams of water
17
In this reaction, two substances combine to form a new substance.
single replacement reaction
decomposition reaction
combustion reaction
synthesis reaction
18
What are the products of photosynthesis?
water to drink, oxygen to breath
sugar to eat, water to drink.
oxygen for us to breathe, sugar (yum!) to eat!
carbon dioxide and water
19
How does a
balanced
chemical equation show Conservation of Matter?
There's the same number of atoms on both sides of the arrow.
A new substance is formed.
Matter is being destroyed.
There are reactants and products.
20
What will balance the equation? ----__ Mn + ___ HI --> ____ H
2
+ ___ MnI
3
2, 1, 2, 1
2, 3, 1, 1
2, 6 , 3, 2
6, 2, 2, 3
21
Why do chemists need to measure stuff in moles?
Because molecules are so small, they are hard to measure!
Because that's what's on the graduated cylinder.
Molecules are big, so you need a special unit.
22
In this equation, what happens to the oxygen molecules?
They combine with CH4 to make one molecule
They bond together to make a large oxygen molecule.
2 become part of CO2, and 2 become part of 2 water molecules
They are destroyed.
23
What will balance this equation? ---- ___Na
3
P + __CaF
2
--> __NaF + __Ca
3
P
2
3, 2, 6, 6
2, 3, 1, 1
2, 2, 1, 1
2, 3, 6, 1
24
What is the difference between an endothermic and an exothermic reaction?
One is hot, the other is room temperature.
Endothermic is hot, Exothermic is cold.
Only exothermic measures temperature.
Endothermic is cold, Exothermic is hot.
25
In this equation, how many atoms are in the CH
4
molecule?
2
1
5
4
26
What is meant by the Conservation of Matter?
Matter is destroyed, then created in the stars again.
Matter is created and conserved in the universe.
Matter is both substances and energy.
Matter is not created or destroyed, only transformed.
27
What is the equation for photosynthesis?
6CO2 + 6H2O ==> H2 + 6CO3
C6H12O6 + 6O2 ==> 6CO2 + 6H2O
6CO2 + 6H2O ==> C6H12O6 + 6O2
6CO2 + 6H2O ==> C12H22O11 + O2
28
How did you see the definition of chemistry in the Sugar Worms lab?
The sugar lit on fire.
The sugar burned and smelled like marshmallows.
The kerosene provided activation energy.
A new substance, carbon, formed from the sugar decomposing.
29
What is the equation for cellular respiration?
H2O + 6 O2 ==> C6H12O6 + 6 O2
C6H12O6 + 6 O2 ==> 6CO2 + 6H2O
6CO2 + 6H2O ==> C6H12O6 + 6 O2
C6H12O6 + 6 O2 ==> H2O + 6 O2
