ChLM Final Review Name: Period: Base Knowledge 1. Classify the
... 1. Classify the following as observations or inferences a) The liquid is green because food coloring was added. b) The beaker has green liquid in it. c) The beaker can hold up to 250 mL. d) The beaker will be the best tool for this lab. 2. Measure the following, circle your estimated digit and inclu ...
... 1. Classify the following as observations or inferences a) The liquid is green because food coloring was added. b) The beaker has green liquid in it. c) The beaker can hold up to 250 mL. d) The beaker will be the best tool for this lab. 2. Measure the following, circle your estimated digit and inclu ...
Part of a Molecular Compound
... • On many of them you can round to the nearest gram, except for elements that atomic masses end in 0.5 • Use as many significant figures needed to maintain the number of significant figures given in the problem. ...
... • On many of them you can round to the nearest gram, except for elements that atomic masses end in 0.5 • Use as many significant figures needed to maintain the number of significant figures given in the problem. ...
Qualitative Analysis Lab
... Qualitative analysis is the identification of an unknown substance without regard to the amount or concentration, and, by knowing how substances react, we can often identify unknowns very easily. In this lab, you will be given seven colorless solutions that you will be required to identify by carryi ...
... Qualitative analysis is the identification of an unknown substance without regard to the amount or concentration, and, by knowing how substances react, we can often identify unknowns very easily. In this lab, you will be given seven colorless solutions that you will be required to identify by carryi ...
Ch 17 practice assessment w
... When transporting food or other perishable items, more is involved than simply putting them into a package and sealing. Some perishable items can be sensitive to changes in temperature and humidity. If they are to stay fresh for the longest possible time, they need to be kept in a controlled environ ...
... When transporting food or other perishable items, more is involved than simply putting them into a package and sealing. Some perishable items can be sensitive to changes in temperature and humidity. If they are to stay fresh for the longest possible time, they need to be kept in a controlled environ ...
1 Mole
... Atomic symbols describe the type of atoms in the compound (copper, sulfur, oxygen) subscript numbers describe the number of atoms in the compound (1 copper, 1 sulfur, 4 oxygen) subscript letters describe the physical state of the compound (aqueous) ...
... Atomic symbols describe the type of atoms in the compound (copper, sulfur, oxygen) subscript numbers describe the number of atoms in the compound (1 copper, 1 sulfur, 4 oxygen) subscript letters describe the physical state of the compound (aqueous) ...
Chapter 10 Chemical Reactions
... The Law of Conservation of Matter tells us that matter (or mass) cannot be created nor destroyed. This is very important in chemical reactions because it means that the mass of the reactants must equal the mass of the products. Or in other words, the number of reactant atoms must equal the number of ...
... The Law of Conservation of Matter tells us that matter (or mass) cannot be created nor destroyed. This is very important in chemical reactions because it means that the mass of the reactants must equal the mass of the products. Or in other words, the number of reactant atoms must equal the number of ...
1. Formulae, equations and amounts of substance
... Gas syringes can be used for a variety of experiments where the volume of a gas is measured, possibly to work out moles of gas or to follow reaction rates. The volume of a gas depends on pressure and temperature so when recording volume it is important to note down the temperature and pressure of th ...
... Gas syringes can be used for a variety of experiments where the volume of a gas is measured, possibly to work out moles of gas or to follow reaction rates. The volume of a gas depends on pressure and temperature so when recording volume it is important to note down the temperature and pressure of th ...
Equilibrium Constant- Keq
... Equilibrium Constant- Keq 1. In an experiment, 0.500 mol/L of hydrogen bromide gas is decomposed into hydrogen and bromine gases. a) Write the equilibrium equation and equilibrium law for this reaction. b) The equilibrium concentrations in this system are [HBr(g)] =0.240 mol/L and [H2(g)]=0.130 mol/ ...
... Equilibrium Constant- Keq 1. In an experiment, 0.500 mol/L of hydrogen bromide gas is decomposed into hydrogen and bromine gases. a) Write the equilibrium equation and equilibrium law for this reaction. b) The equilibrium concentrations in this system are [HBr(g)] =0.240 mol/L and [H2(g)]=0.130 mol/ ...
Basic Chemistry notes
... ______________________—two or more like atoms combined chemically ______________________—two or more different atoms combined chemically ...
... ______________________—two or more like atoms combined chemically ______________________—two or more different atoms combined chemically ...
key to sample questions test 2
... How many moles of NaCl are in 100 mL of 2 M NaCl (0.100L)(2 mol L-1) = 0.2 mol ...
... How many moles of NaCl are in 100 mL of 2 M NaCl (0.100L)(2 mol L-1) = 0.2 mol ...
CHM100PracticeExam2
... 48. Balance the following equation using the smallest set of whole numbers, then add together the coefficients. Don’t forget to count coefficients of one. ___ SF4 + ___ H2O → ____H2SO3 + ___ HF A) 4 B) 9 C) 6 D) 7 49. When 22.0 g NaCl and 21.0 g H2SO4 are mixed and react according to the equation be ...
... 48. Balance the following equation using the smallest set of whole numbers, then add together the coefficients. Don’t forget to count coefficients of one. ___ SF4 + ___ H2O → ____H2SO3 + ___ HF A) 4 B) 9 C) 6 D) 7 49. When 22.0 g NaCl and 21.0 g H2SO4 are mixed and react according to the equation be ...
File - Evergreen Tutor Zone
... Whereas the mass of 1 molecule is called the relative molecular mass and the mass of 1 formula unit is called the relative formula mass, the mass of 1 mole of molecules is called the molar mass and is expressed in g∙mol-1. Consider CO2. 12 + 2(16) = 44 = mass of 1 molecule of CO2. But 44 g∙mol-1 is ...
... Whereas the mass of 1 molecule is called the relative molecular mass and the mass of 1 formula unit is called the relative formula mass, the mass of 1 mole of molecules is called the molar mass and is expressed in g∙mol-1. Consider CO2. 12 + 2(16) = 44 = mass of 1 molecule of CO2. But 44 g∙mol-1 is ...
Chemistry EOC Review Spring 2013
... 2. Distinguish between hypothesis, theory, and law. 3. Classify the following as having good or poor accuracy and good or poor precision: 4. A scientist experimentally determines the speed of light to be 2.98 x 108 m/sec. In a second experiment, she determines the speed to be 2.99 x 108 m/sec. 5. Th ...
... 2. Distinguish between hypothesis, theory, and law. 3. Classify the following as having good or poor accuracy and good or poor precision: 4. A scientist experimentally determines the speed of light to be 2.98 x 108 m/sec. In a second experiment, she determines the speed to be 2.99 x 108 m/sec. 5. Th ...
Balancing a Chemical Equation
... each side of the equation. Never formulas for the products on the balance an equation by changing right with a yields sign (→) in the subscripts in a chemical formula. between. If two or more reactants or Each substance only has one products are involved, separate their correct formula. formulas wit ...
... each side of the equation. Never formulas for the products on the balance an equation by changing right with a yields sign (→) in the subscripts in a chemical formula. between. If two or more reactants or Each substance only has one products are involved, separate their correct formula. formulas wit ...
Honors Chemistry I
... 1) Be sure to identify the reactants (on the left side) and the products (on the right side) 2) Count the total number of atoms of each element on each side of the equation a. If there is an imbalance of an atom, start planning a strategy to bring balance to the equation b. You will use coefficients ...
... 1) Be sure to identify the reactants (on the left side) and the products (on the right side) 2) Count the total number of atoms of each element on each side of the equation a. If there is an imbalance of an atom, start planning a strategy to bring balance to the equation b. You will use coefficients ...
Gr 10 Review sheet chemistry
... The coefficient (2) applies to all elements: Therefore, 2 Ca atoms total 2 N atoms 2 O atoms The subscript 3 only follows O so we have 2 x 3 O = 6 O The subscript 2 is outside brackets, so it applies to N and O Therefore, 2 x 6 O = 12 oxygen atoms total 2 x 2 N = 4 nitrogen atoms total 2. Give the n ...
... The coefficient (2) applies to all elements: Therefore, 2 Ca atoms total 2 N atoms 2 O atoms The subscript 3 only follows O so we have 2 x 3 O = 6 O The subscript 2 is outside brackets, so it applies to N and O Therefore, 2 x 6 O = 12 oxygen atoms total 2 x 2 N = 4 nitrogen atoms total 2. Give the n ...
Atomic Structure
... (2) decreases, but the concentration of ions remains the same (3) increases because the concentration of ions decreases (4) increases, but the concentration of ions remains the same ...
... (2) decreases, but the concentration of ions remains the same (3) increases because the concentration of ions decreases (4) increases, but the concentration of ions remains the same ...
South Pasadena • AP Chemistry
... c has the equilibrium expression that the inverse of the above expression as it is the reverse of reactions a & b, or Kc = [N2O(g) ]2 [O2(g) ]3 [NO2(g) ]4 ...
... c has the equilibrium expression that the inverse of the above expression as it is the reverse of reactions a & b, or Kc = [N2O(g) ]2 [O2(g) ]3 [NO2(g) ]4 ...
Stoichiometry
Stoichiometry /ˌstɔɪkiˈɒmɨtri/ is the calculation of relative quantities of reactants and products in chemical reactions.Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals the total mass of the products leading to the insight that the relations among quantities of reactants and products typically form a ratio of positive integers. This means that if the amounts of the separate reactants are known, then the amount of the product can be calculated. Conversely, if one reactant has a known quantity and the quantity of product can be empirically determined, then the amount of the other reactants can also be calculated.As seen in the image to the right, where the balanced equation is:CH4 + 2 O2 → CO2 + 2 H2O.Here, one molecule of methane reacts with two molecules of oxygen gas to yield one molecule of carbon dioxide and two molecules of water. Stoichiometry measures these quantitative relationships, and is used to determine the amount of products/reactants that are produced/needed in a given reaction. Describing the quantitative relationships among substances as they participate in chemical reactions is known as reaction stoichiometry. In the example above, reaction stoichiometry measures the relationship between the methane and oxygen as they react to form carbon dioxide and water.Because of the well known relationship of moles to atomic weights, the ratios that are arrived at by stoichiometry can be used to determine quantities by weight in a reaction described by a balanced equation. This is called composition stoichiometry.Gas stoichiometry deals with reactions involving gases, where the gases are at a known temperature, pressure, and volume and can be assumed to be ideal gases. For gases, the volume ratio is ideally the same by the ideal gas law, but the mass ratio of a single reaction has to be calculated from the molecular masses of the reactants and products. In practice, due to the existence of isotopes, molar masses are used instead when calculating the mass ratio.