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Study sets matching "chemistry calculations chemical"

14 terms
GHS Chemistry: Unit 1- Chemical Calculations Quiz
Density =
% Error Equation
Density Triangle
Metric Prefix Conversions
Mass (g) / Volume (mL or L)
Needs to be < 2%
Kile-Had-Dirrehea-BASE-During-Coles-Midterm
Density =
Mass (g) / Volume (mL or L)
% Error Equation
Needs to be < 2%
8 terms
Chemistry 2: chemical calculations
there are 8 pupils, 7 girls and 1 boy.…
carbon dioxide (CO2) ... work out the % c…
percentage yield
exothermic reaction
1/8 x 100 = 12.5%... 7/8 x 100 = 87.5%
Ar (C) = 12 Ar (O) = 16... C = 1 x 12 = 12 O = 2 x 16 = 31 ... CO2…
actual/expected x 100%
heat is produced ... temperature rises... energy is lost
there are 8 pupils, 7 girls and 1 boy.…
1/8 x 100 = 12.5%... 7/8 x 100 = 87.5%
carbon dioxide (CO2) ... work out the % c…
Ar (C) = 12 Ar (O) = 16... C = 1 x 12 = 12 O = 2 x 16 = 31 ... CO2…
16 terms
CHEMISTRY- Chemical Equation Calculations
Mole Ratio
Avogadro's Theory
Law of Conservation of Mass
Stoichiometry
The coefficients indicate the ratio of moles.
There are equal numbers of molecules in equal volumes of has…
Mass is neither created nor destroyed during a chemical react…
The relationship between quantities is a chemical reaction ac…
Mole Ratio
The coefficients indicate the ratio of moles.
Avogadro's Theory
There are equal numbers of molecules in equal volumes of has…
10 terms
chemistry-chemical calculations
isotopes
relative atomic mass
mass number
empirical formula
Atoms of the same element with different masses
average mass of an atom of an element compared to 1/12 of an…
number of protons + number of neutrons in an atom
a chemical formula
isotopes
Atoms of the same element with different masses
relative atomic mass
average mass of an atom of an element compared to 1/12 of an…
15 terms
Chemistry - Ch#9 - Chemical Equations Calculations
Mole Ratio
Avogadro's Theory
Law of Conservation of Mass
Molar Mass
The ratio of moles of reactants & products according to the c…
The principle that equal volumes of gases contain equal numbe…
The principle that states that the total mass of reactants in…
The mass in grams of 1 mol of substance
Mole Ratio
The ratio of moles of reactants & products according to the c…
Avogadro's Theory
The principle that equal volumes of gases contain equal numbe…
10 terms
Chemistry(Unit5) Chemical calculations
Reagent
relative atomic mass
relative molecular mass
Avogadro constant
试剂
相对原子质量
相对分子质量
阿伏伽德罗常数
Reagent
试剂
relative atomic mass
相对原子质量
30 terms
CHEMISTRY - Remove exam : chemical calculations
What are the 4 state symbols and what…
What is an isotope?
Give an example of an isotope
What is the relative atomic mass used…
(s) - solid... (l) - liquid... (g) - gas ... (aq) - aqueous - dissolve…
Atoms with the same atomic number but different mass numbers…
Carbon - 12 Carbon - 14 ... 6 protons 6 protons... 6 electrons 6 e…
Relative atomic mass (Ar) is just a way of saying how heavy d…
What are the 4 state symbols and what…
(s) - solid... (l) - liquid... (g) - gas ... (aq) - aqueous - dissolve…
What is an isotope?
Atoms with the same atomic number but different mass numbers…
38 terms
Chemistry. C1. Chemical calculations
Reactants
Products
What are 4 states?
Ide
What the starting substances of a reaction are
What is produced from a reaction
Solid, liquid, gas ams aqueous
No oxygen
Reactants
What the starting substances of a reaction are
Products
What is produced from a reaction
15 terms
Chemistry. CH1. Chemical calculations
Relative atomic mass
Relative isotopic mass
Relative molecular mass
Relative formula mass
...
...
...
Relative atomic mass used to calculate this.
Relative atomic mass
...
Relative isotopic mass
...
16 terms
BJU Chemistry Chapter 9: Chemical Calculations
Mole
Avogadro's Number (N_A)
Molar Mass (MM)
Structural Formulas
The amount of substance (matter) contained in 6.022 x 10^23 (…
The number 6.022 x 10^23 named in honor of the Italian physic…
The mass of one mole of any pure substance. These particles c…
Show the types of atoms involved, the exact composition of ea…
Mole
The amount of substance (matter) contained in 6.022 x 10^23 (…
Avogadro's Number (N_A)
The number 6.022 x 10^23 named in honor of the Italian physic…
64 terms
Chemistry L5: Chemical Equations and Calculations
Any substance that we start with when…
new substance that is formed during th…
The Law of Conservation of Matter
How do we know if a chemical reaction…
reactant
product
This law, often called the "mass" law states that in... chemical…
Change in colour... • Production of light... • Formation of a solid…
Any substance that we start with when…
reactant
new substance that is formed during th…
product
16 terms
Chemical Calculations
Mass Spectrometer
Atomic mass unit (amu)
Carbon-12
Atomic mass
An instrument used to determine the relative masses of atoms…
A unit for describing the mass of an atom, 1 amu= 1/12 the ma…
The common element which forms the base by which relative ato…
The weighted average mass of all the isotopes of an element.
Mass Spectrometer
An instrument used to determine the relative masses of atoms…
Atomic mass unit (amu)
A unit for describing the mass of an atom, 1 amu= 1/12 the ma…
10 terms
Glossary For IGCSE Chemistry-Unit 5 Chemical calculations
reagent
relative atomic mass
relative molecular mass
Avogadro constant
试剂
相对原子质量
相对分子质量
阿伏加德罗常数
reagent
试剂
relative atomic mass
相对原子质量
10 terms
Chemistry Ch. 3 Calculations with Chemical Formulas
molecular mass
formula mass
mole
percentage composition
the sum of the atomic masses of all the atoms in a molecule o…
the sum of the atomic masses of all atoms in a formula unit o…
the quantity of a given substance that contains as many molec…
the mass percentages of each element in the compound
molecular mass
the sum of the atomic masses of all the atoms in a molecule o…
formula mass
the sum of the atomic masses of all atoms in a formula unit o…
24 terms
Collins AQA Chemistry Chapter 3: Chemical quantities and calculations
conservation of mass
reactants
products
balanced equation
The principle that states that no atoms are lost or made duri…
The substances that react together during a chemical reaction.
The substances that are made during a chemical reaction.
A chemical equation written so that the total number of atoms…
conservation of mass
The principle that states that no atoms are lost or made duri…
reactants
The substances that react together during a chemical reaction.
29 terms
Stoichiometry: Calculations with Chemicals Formulas, and Equations Chemistry
What is stoichiometry?
Can atoms be created or destroyed duri…
What does the + sign means?
Reactants are signified by what symbol?
Stoichiometry examines the quantities of substances consumed…
NO
The + sign means that a particular element is to react with t…
Reactants are signified by the left of the arrow.
What is stoichiometry?
Stoichiometry examines the quantities of substances consumed…
Can atoms be created or destroyed duri…
NO
11 terms
SAT Chemistry: Stoichiometry (Chemical Calculations) and the Mole Concept
Avogadro's Number
Avogadro's Law
Molar Mass
Dealing with Elements
6.02 * 10^23 units = 1 mole
equal volumes of different gases contain equal numbers of mol…
1 mole of that compound in grams
moles * molar mass = mass
Avogadro's Number
6.02 * 10^23 units = 1 mole
Avogadro's Law
equal volumes of different gases contain equal numbers of mol…
10 terms
Chemistry U2 L2 Chemical Calculations
Chemical Calculations
What is the general procedure for solv…
mole ratio
balanced equation for the production o…
In chemical calculations, mole ratios are used to convert bet…
In a typical stoichiometric problem, the given quantity is fi…
a conversion factor derived from the coefficients of a balanc…
N2 (g) + 3H2 (g) → 2NH3(g)
Chemical Calculations
In chemical calculations, mole ratios are used to convert bet…
What is the general procedure for solv…
In a typical stoichiometric problem, the given quantity is fi…
10 terms
Chemistry - chapter 5 Calculating Chemical Quantities
amu
Avogadro constant
Empirical formula
Law of conservation of mass
Atomic mass unit. 1/12 the mass of one atom of carbon-12.
The number of atoms in exactly 12 grams of the carbon-12 isot…
The simplest whole number ratio of the elements in a chemical…
States that in a chemical reaction matter is neither created…
amu
Atomic mass unit. 1/12 the mass of one atom of carbon-12.
Avogadro constant
The number of atoms in exactly 12 grams of the carbon-12 isot…
14 terms
Chemical calculations
Relative atomic mass
Relative isotopic mass
Relative formula mass
Use of mass spectrometer
The average mass of one atom of the element relevant to one t…
The mass of an atom of an isotope relative to 1/12 of the mas…
The average mass of a molecule relative to 1/12 of the mass o…
To find ram of an element by measuring... Mass of each differen…
Relative atomic mass
The average mass of one atom of the element relevant to one t…
Relative isotopic mass
The mass of an atom of an isotope relative to 1/12 of the mas…
25 terms
Science Chemistry 2A - Calculations, Percentage Yield and Chemical Analysis
Atomic mass
Atomic number
Isotope
Relative atomic mass
Protons+neutrons
Protons=electrons
The same element with a different number of neutrons.
A way of saying how heavy different atoms are, compared with…
Atomic mass
Protons+neutrons
Atomic number
Protons=electrons
Chemical Calculations
Mass spectrometer
Atomic mass
Weighted average
Formula mass
Measures the masses of atoms and their components.
The weighted average of an element.
The atomic mass of an isotope based on the percentage abundan…
The sum of the masses of all of the atoms in a given element.
Mass spectrometer
Measures the masses of atoms and their components.
Atomic mass
The weighted average of an element.
13 terms
Chemical calculations
Relative atomic mass
Relative isotopic mass
Relative molecular mass
Avagadro constant
The weighted average mass of all atoms in a normal isotopic s…
The mass of an atom of a particular isotope on the scale wher…
...
6x10^23
Relative atomic mass
The weighted average mass of all atoms in a normal isotopic s…
Relative isotopic mass
The mass of an atom of a particular isotope on the scale wher…
8 terms
Chemical Calculations
What is a 'binary compound'?
How do we convert masses into 'moles'?
How do we calculate the percentage com…
How do we calculate percentage yield?
A compound consisting of two different elements.
No. of Moles = Mass / Ar or Mr Value
% Composition = (Mass of Element / Mr of Compound) x 100
% Yield = Actual Mass / Theoretical Mass
What is a 'binary compound'?
A compound consisting of two different elements.
How do we convert masses into 'moles'?
No. of Moles = Mass / Ar or Mr Value
17 terms
Chemical Calculations
How many are in a test tube of water a…
Mole (mol)
What does Avogadro determine?
What is the mol used with?
6 trillion... tons
the amount of substance contained in 6.022x10²³ particles (Av…
determined the volume of one mole of gas... -1 mol of He atoms=…
only with small objects on the atomic scale... -a mole of marble…
How many are in a test tube of water a…
6 trillion... tons
Mole (mol)
the amount of substance contained in 6.022x10²³ particles (Av…
12 terms
chemical calculations
suffix
coefficient
what can change suffix or coefficient
when balancing equations, what side do…
how many of an element
how many molecules of that compound are
coefficient
left to right
suffix
how many of an element
coefficient
how many molecules of that compound are
19 terms
Chemical Calculations
metal + acid -->
metal oxide + acid -->
metal carbonate + acid -->
alkali + acid
salt + hydrogen
salt + water
salt + water + carbon dioxide
salt + water
metal + acid -->
salt + hydrogen
metal oxide + acid -->
salt + water
9 terms
Chemical Calculations
Protons and neutrons
Shells
Mass: 1 Charge: +1
Mass: 1 Charge: 0
The centre of an atom (nucleus) is made up of
Where are electrons in an atom?
Mass and charge of a proton
Mass and charge of a neutron
Protons and neutrons
The centre of an atom (nucleus) is made up of
Shells
Where are electrons in an atom?
13 terms
Chemical calculations
Relative atomic mass
Mole
Formula
Relative formula mass
The weight of the whole element, not just electrons
A weight unique to every element (basically the relative atom…
Two substances mixed together
The relative atomic mass of elements in a formula added toget…
Relative atomic mass
The weight of the whole element, not just electrons
Mole
A weight unique to every element (basically the relative atom…
25 terms
Chemical Calculations
Avogadros Constant = 6.02x10^23
Amount in moles (n) = mass (m) / molar…
Molar mass is the mass of one mole of…
Stoichiometry is the molar relationshi…
What is Avogadros Constant?
How do you work out the amount of substance in moles?
What is molar mass?
What is stoichiometry?
Avogadros Constant = 6.02x10^23
What is Avogadros Constant?
Amount in moles (n) = mass (m) / molar…
How do you work out the amount of substance in moles?
12 terms
Chemical calculations
Relative atomic mass
Relative isotopic mass
Relative formula mass
One mole
The average mass of one atom of the element relative to one-t…
The mass of an atom of an isotope relative to one-twelfth the…
The average mass of a molecule relative to one-twelfth the ma…
Is the amount of any substance that contains the same number…
Relative atomic mass
The average mass of one atom of the element relative to one-t…
Relative isotopic mass
The mass of an atom of an isotope relative to one-twelfth the…
10 terms
Chemical calculations
Mole
Number of moles
Relative Isotopic mass
Isotopes
One mole of any substance contains the same number of particl…
Mass / Mr
The mass of an isotope (of an element) compared to 1/12 of th…
Atoms of the same element with the same atomic number but dif…
Mole
One mole of any substance contains the same number of particl…
Number of moles
Mass / Mr
14 terms
AP Chemistry 03 - Stoichiometry: Calculations with Chemical Formulas and Equations
Stoichiometry
Chemical Equation
Reactants
Products
The relationships among the quantities of reactants and produ…
A representation of a chemical reaction using the chemical fo…
A starting substance in a chemical reaction; it appears to th…
A substance produced in a chemical reaction; it appears to th…
Stoichiometry
The relationships among the quantities of reactants and produ…
Chemical Equation
A representation of a chemical reaction using the chemical fo…
8 terms
Chemical Calculations
Mass spectrometer
Standard mass
Mole
Molar Mass
The instrument used to measure masses of atoms and their comp…
Chemist agreed that a neutral atom of the isotope carbon-12 i…
It represents a number and a mass... One mole refers to Avogadro…
If happens to be an element the molar mass will refer to the…
Mass spectrometer
The instrument used to measure masses of atoms and their comp…
Standard mass
Chemist agreed that a neutral atom of the isotope carbon-12 i…
7 terms
Chemistry Calculations
Atom economy =
% yield =
Number of moles =
Mass =
total mr of useful products... _________________________________…
actual yield... ________________________ * 100... theoretical yield
vol * molarity... ____________________... 1000
moles * Mr
Atom economy =
total mr of useful products... _________________________________…
% yield =
actual yield... ________________________ * 100... theoretical yield
14 terms
AP Chemistry: Chapter 3 - Calculations with Chemical Formulas and Equations
stochiometry
reactants
products
combination reaction
the area of study that examines the quantities of substances…
chemical formulas to the left of the arrow
substances produced in the reaction, to the right of the arrow
two or more substance react to form one product
stochiometry
the area of study that examines the quantities of substances…
reactants
chemical formulas to the left of the arrow
14 terms
Chemistry: Chapter 3: Stoichiometry: Calculations with Chemical Formulas and Equations
stoichiometry
chemical equation
reactant
product
the relationships among the quantities of reactants and produ…
a representation of a chemical reaction using the chemical fo…
a starting substance in a chemical reaction; it appears to th…
a substance produced in a chemical reaction; it appears to th…
stoichiometry
the relationships among the quantities of reactants and produ…
chemical equation
a representation of a chemical reaction using the chemical fo…
29 terms
Stoichiometry: Calculations with Chemicals Formulas, and Equations Chemistry Ch.3
What is stoichiometry?
Can atoms be created or destroyed duri…
What does the + sign means?
Reactants are signified by what symbol?
Stoichiometry examines the quantities of substances consumed…
NO
The + sign means that a particular element is to react with t…
Reactants are signified by the left of the arrow.
What is stoichiometry?
Stoichiometry examines the quantities of substances consumed…
Can atoms be created or destroyed duri…
NO
27 terms
AP Chemistry Chapter 3 Stoichiometry : Calculations with Chemical Formulas and Equations
Chemical equations
Reactants
Products
coeffient
Represents a chemical reaction using chemical formulas.
What goes in to the equation
What is produced after the experiment
The number in front of the formula, amount
Chemical equations
Represents a chemical reaction using chemical formulas.
Reactants
What goes in to the equation
15 terms
Chemistry Calculations
Define relative atomic mass
Define relative molecular mass
When 12g of carbon is burned in air, 4…
Define mole
Ar: The ratio of the average mass per atom of the naturally o…
Mr: The sum of the relative atomic masses of all the atoms sh…
1.carbon / carbon dioxide = χ / 11... 2.carbon / carbon dioxide…
The amount of substance with the Avogadro number of particles.
Define relative atomic mass
Ar: The ratio of the average mass per atom of the naturally o…
Define relative molecular mass
Mr: The sum of the relative atomic masses of all the atoms sh…
7 terms
Chemistry Calculations
Density
Percent Composition
% Mass of a Know Compound
Calculate the mass of C in 82.0 g of p…
Mass/Volume (Mass units = grams, etc.; Volume Units = L, mm3,…
The percent composition of each element (actually the mass pe…
% mass = grams of element in one mole of compound x 100% mole…
C3H8 -- grams of C3H8 → grams C ... % C in C3H8 = 81.72%... ... 82.…
Density
Mass/Volume (Mass units = grams, etc.; Volume Units = L, mm3,…
Percent Composition
The percent composition of each element (actually the mass pe…
13 terms
Chapter 4: Chemical Calculations
atomic mass
formula mass
Avogadro's number (Na)
Molar mass
weighted average of isotope or element
sum of the masses of all of the atoms in a given formula
6.02 X 10 ^23
the formula mass of the substance expressed in grams
atomic mass
weighted average of isotope or element
formula mass
sum of the masses of all of the atoms in a given formula
25 terms
Chemistry Calculations
metric system
density
% error
% by abundance
KHDBDCM
mass/volume
(actual - experimental / actual ) x 100
molar mass of just element/ molar mass of total compound x 100%
metric system
KHDBDCM
density
mass/volume
24 terms
UNIT 3 Chemistry 101 Clinical Laboratory Calculations/Chemical solutions
Properties of solutions consist of..
*Liquid solutions
*Liquid solutions in solutions of elec…
* True solutions:
- Are the majority of chemical reactions... -Soute's, Solvents,…
-Clear, transparent, colored or colorless, conductors/non con…
-The solutes are ionic compounds that have dissociated, the s…
-uniform properties, solute cannot be dissolved by filtration…
Properties of solutions consist of..
- Are the majority of chemical reactions... -Soute's, Solvents,…
*Liquid solutions
-Clear, transparent, colored or colorless, conductors/non con…
11 terms
Chemistry Calculations
n = m / Mr
n = c x v
changing cm3 into dm3
Empirical Formula
Moles = mass/relative formula mass... SOLIDS ONLY
Moles = concentration x volume... LIQUIDS ONLY
divide by 1000
lowest whole number ratio
n = m / Mr
Moles = mass/relative formula mass... SOLIDS ONLY
n = c x v
Moles = concentration x volume... LIQUIDS ONLY
8 terms
Chemical Energy & Calculations
Exothermic Reaction
Endothermic Reactions
Breaking and Making Bonds Energy Calcu…
Relative Molecular Mass calculatons
A reaction where temperatures rise
A reaction where temperatures fall
Work out how much energy it takes to break the bonds for each…
Add up all the atomic masses ... e.g. MgCL2 Mg-24 Cl-35... 24+35+35…
Exothermic Reaction
A reaction where temperatures rise
Endothermic Reactions
A reaction where temperatures fall
25 terms
Chemistry Calculations
metric system
density
% error
% by abundance
KHDBDCM
mass/volume
(actual - experimental / actual ) x 100
molar mass of just element/ molar mass of total compound x 100%
metric system
KHDBDCM
density
mass/volume
18 terms
AP Chemistry - Chapter 3: Stoichiometry: Calculations with Chemical Formulas and Equations
Steps to balance equations
percentage composition
percentage composition formula
mole
1. Determine coefficients that provide equal numbers of each…
the percentage by mass contributed by each element in the sub…
% element = {[(number of atoms of that elements)x(atomic weig…
the amount of matter that contains as many objects (atoms, mo…
Steps to balance equations
1. Determine coefficients that provide equal numbers of each…
percentage composition
the percentage by mass contributed by each element in the sub…
10 terms
CHEMISTRY SEMESTER 2 CH. 9 Calculations From Chemical Equations
Stoichiometry
Molar mass
Mole
Mole ratio
- the area of chemistry that deals with quantitive relationsh…
- The sum of the atomic masses of all the atoms in an element…
1 mole = 6.022 X 10^23 formula units... -number of moles = numbe…
- The ratio between the number of moles of any two species in…
Stoichiometry
- the area of chemistry that deals with quantitive relationsh…
Molar mass
- The sum of the atomic masses of all the atoms in an element…
12 terms
Chemical Calculations and Atomic Structure
How is light produced?
What is the photoelectric effect?
Dalton's Model (
Plum Pudding
When an electron loses energy, it falls back to its ground st…
When light (Photons) of certain wave length and frequency fal…
solid, round ball... no protons, neutrons, electrons, or nucleus
solid, round positive matrix negative electron scattered in i…
How is light produced?
When an electron loses energy, it falls back to its ground st…
What is the photoelectric effect?
When light (Photons) of certain wave length and frequency fal…
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