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Review | Constants I Periodic Table
Percent composition refers to the mass percent of
each element in a compound:
mass of element
Part A
mass percent =
x 100%
mass of compound
>
For example, the percent composition of water, H2O.
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CHE 1111-004: Principles of Chemistry I, Fall 2021
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Suppose the following chemical reaction can take place in this mixture:
CS,(9)+30,(9)
- CO2(9)+2 SO,(9)
Of which reactant are there the most initial moles? Enter its chemical formula:
Of which reactant are there the least initial moles? Enter its chemical formula:
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Tme following tabie compares irie mass of packaging, tolal cost and Tiumber of servirigs of irOzen
concentrate and drinking boxes. Use the table to answer questions 40-41
Servings of
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2.58
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following formula.
Mass of packaging
Mass of Package
per serving
Number of Servings
Calculations: 123.88
41. Calculate the cost per serving for both frozen concentrate and drinking boxes. Use the following
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Total Cost
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What are two ways to get it to react as fully as possible to form as much C as possible?
a) remove C as it forms, and use an excess of A
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c) remove C as it forms, and use an excess of B
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Enzymes lower the activation energy of a chemical reaction. This means that the reaction is more likely to proceed, and results in faster formation of products.
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Complete this vocabulary exercise relating to enzymes.
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where the reaction occurs.
substrate
2. A small organic molecule necessary for the function of some enzymes…
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Content
X b Answered: How many mL of X
Bb SolutionsQuiz(2)
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126% + | A
How many mL of a 4 M Al(OH)3 solution are needed to reaction with 125 mL of a
2 M HCl solution?
6.
Al(OH)3 (s) + 3 HCl (aq)
З НСІ
→ AICI3 (aq) + 3 H2O (1)
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C Cle. X
Ck-1 x
CK- X
Juiz x C Infin X
Pot x
Wor X
M Inbox
Batt X
Gfren x
ton X
Car X
grat x
← → CO
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Other
Synthesis
Combustion
Double replacement
4
1.5 points
1
Use coefficients to balance the following equation: (if no coefficient is needed, use "1", do not leave any box blank!) 1
2
1
3
4
S
1.5 points
Li2CO3-----> 1
MgCO3 + 2
MgF2+
LiF
5
9
7
8
00
9
Potassium Chlorate decomposes into potassium chloride and oxygen gas.
How many grams of oxygen are produced when 8.40 grams of potassium chlorate decompos
completely?
Type your answer...
10
1.5 points
11
12
What type of chemical reaction does this equation represent?
Fe2O3+ C --> CO + Fe
C
#
$
4
%
5
&
6
7
8
9
0
2
3
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