Honors Chemistry 10 Test 1 Practice

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• Which term describes a chemical reaction or physical change that absorbs energy; ΔH is positive.
• Which law implies that a given compound has fixed elemental composition by mass regardless of source and size?
• Which term describes the solid-to-gas phase change?
• Energy cannot be created or destroyed in ordinary chemical or physical changes but can be converted from one form to another.
• If you have 88.02 g CO2, how many moles is that?
• Which variable is acted upon or measured and placed on the vertical axis in a plot?
• In CO2, the formal charges on all atoms are zero.
• The process by which a gas changes directly to a solid without passing through a liquid is called?
• Which equation expresses a direct proportional relationship?
• In Charles' Law, which condition is held constant to relate volume and temperature?
• The energy associated with condensing a gas to a liquid is called which term?
• An experiment in which one or more variables are changed to determine their effects on other variables.
• Resistance to change in motion; proportional to mass.
• Matter is defined as?
• If P = 1 atm, V = 24.0 L, n = 1.00 mol, what is T? (R = 0.08206 L atm / mol K)
• Which term describes a logical approach to solving problems?
• If you start with 8.0 g KClO3, approximately how many grams of O2 are produced?
• Which gas law relates volume to temperature at constant pressure?
• The mass of one mole of an element equals its average atomic mass from the periodic table. What is this mass called?
• A tested hypothesis that explains a body of facts, has stood the test of time, and is supported by a large amount of data; explains why things happen.
• Which description best defines an element?
• Which term describes a chemical reaction or physical change that releases heat; ΔH is negative.
• Endothermic or exothermic: Which absorbs heat from surroundings?
• In a chemical change, which term identifies the substances formed as a result of the reaction?
• How many significant figures are in 0.00450 g?
• The mass of H2 produced when 3.00 g Mg reacts with excess HCl in Mg + 2HCl → MgCl2 + H2.
• Which process is the direct transition from solid to gas without passing through the liquid state?
• How many significant figures are in 0.07890?
• How many moles are in 50.0 g of CO2 (molar mass ~44.01 g/mol)?
• Which statement best describes colloid separation?
• Which substance is the exception to the rule that solids are the most dense state for substances?
• What is the chemical formula for aluminum sulfate?
• What is the maximum number of electrons in the first energy level?
• Graphite, diamond, fullerenes, and buckyball (C-60) are examples of which concept?
• Which term describes numeric data with a unit and a degree of uncertainty?
• Which term describes solids being less compressible than liquids or gases?
• Temperature at which a solid becomes a liquid?
• Which term describes the existence of different forms of the same element such as O2 and O3?
• Which solid type would have a regular, repeating arrangement at the microscopic level?
• If 100.0 g of water absorbs 418 J, what is the approximate temperature change? (c = 4.184 J/g°C)
• The quantity P = F/A is a measure of which concept?
• In inverse proportionality between x and y, which equation expresses the reciprocal relationship?
• The number, unit, and degree of uncertainty taken together in measurements are associated with which concept?
• The product remains constant in which type of relationship?
• Which process is vaporization that occurs from the surface of a liquid at any temperature?
• A reaction has theoretical yield 100 g, but actual yield is 72 g. What is the percent yield?
• If x doubles in the direct proportional relation y = kx, what happens to y?
• The energy associated with vaporizing a liquid to a gas is called which term?
• In the reaction 2 Na + Cl2 → 2 NaCl, with 2.00 mol Na and 2.00 mol Cl2, what is the theoretical yield of NaCl in moles?
• FeCl3 is properly named which of the following?
• Which description best matches a solid that changes volume only slightly with changes in temperature or pressure because there is little empty space for compression?
• What term describes the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius?
• Substance containing at least two different elements; elements are chemically combined in definite proportions.
• Which statement correctly identifies a solution's particle size range?
• If 50.0 g of water at 25°C absorbs 1000 J, what is the temperature change? (c = 4.184 J/g°C)
• How many electrons can occupy the second energy level at most?
• New substances produced by a chemical reaction; appear on the right side of the yield arrow.
• Matter that is not uniform throughout is called which term?
• What is the term for a characteristic that allows us to distinguish one kind of matter from another?
• Determine the oxidation state of sulfur in H2SO4.
• Which statement best describes a chemical property?
• A mixture that is uniform throughout and is called a solution is best described as which of the following?
• Gas particles under pressure passing through a very small opening from one container to another is known as what?
• A mixture that is not uniform throughout; may be a colloid or suspension is called which?
• Matter that cannot be separated by physical means; may be an element or compound is a what?
• Which formula correctly defines formal charge in a Lewis structure?
• The energy associated with freezing a liquid to a solid is called which term?
• What term describes a homogeneous mixture?
• Which term would you use to describe the general concept of different forms of the same element existing in the same state?
• Convert 3.2 x 10^4 m to centimeters.
• What is the formula for ammonium sulfate?
• A 0.50 L sample of a 2.0 M solution is diluted to 2.0 L. What is the final molarity?
• A chemical compound contains the same elements in exactly the same proportions by mass regardless of sample size or source.
• Which term describes the direct proportional relationship expressed by y = xk?
• Which process involves vaporization that occurs at the surface of a non-boiling liquid and can happen at any temperature?
• Which of the following is a suspension example?
• If a gas expands from 3.0 L to 6.0 L at constant n and T, what happens to the pressure?
• Which term describes a solid with a natural geometric pattern or crystal lattice?
• Which solid type lacks a long-range order, such as glass?
• In the decomposition 2 KClO3 -> 2 KCl + 3 O2, what is the mole ratio of O2 to KClO3?
• Which method is used to separate some homogeneous liquid mixtures based on different boiling points?
• Which term represents the amount of heat required to condense 1 gram of a substance?
• Which term describes a reaction that releases heat?
• Electronegativity is defined as which of the following?
• Which change involves only a change in appearance with no change in composition?
• Which term governs the precision of measurements by considering the number of significant digits?
• A testable statement explaining data and observations; may be a hunch based on limited data.
• Which items are examples of solutions?
• Which term describes a substance whose particles can move about; liquids and gases are fluids?
• In a standard data plot, on which axis is the independent variable typically placed?
• Can consist of atoms of the same or different elements.
• Suspensions can be separated by filtration because they do what over time?
• On a standard plot, where is the independent variable placed?
• Which term describes a process that absorbs energy from the surroundings?
• The energy associated with melting a solid to a liquid is called which term?
• Which term refers to a broadly accepted explanation that explains a wide range of phenomena and has withstood testing?
• In an exothermic reaction, ΔH is negative.
• Which statement best describes the light behavior of colloids relative to solutions?
• Write the electron configuration for a neutral phosphorus atom (P, Z=15).
• Which pair are both carbon allotropes?
• Which law states that mass remains constant in chemical and physical changes?
• Which type of data involves non-numeric observations such as color or texture?
• Which term describes a property that does not depend on the amount of matter present?
• How does ionization energy generally change across a period and down a group?
• Which term describes the property of a substance being not easily compressed?
• What is the formula for sodium phosphate?
• Which of the following is an example of an extensive physical property?
• For the combustion of propane: C3H8 + 5 O2 -> 3 CO2 + 4 H2O. If 2.00 mol C3H8 react, how many moles of CO2 are produced?
• In inverse proportionality, the product of the variables is constant. Which equation expresses this relationship?
• Which item is evidence of a chemical change?
• Which physical property does not depend on the amount of matter?
• In a chemical equation, which term describes the substances on the right side after the reaction?
• Which statement best describes the light behavior of a suspension?
• Which law describes the diffusion rates of gases at the same temperature and pressure as being inversely proportional to the square roots of their molar masses?
• Which state of matter has a definite volume but takes the shape of its container?
• What term describes something that consists of only one type of element?
• If 4.00 mol Fe reacts according to Fe + O2 → Fe2O3, how many moles of Fe2O3 can form?
• Matter can neither be created nor destroyed in ordinary chemical or physical changes, although it may change form.
• Which property describes the ability of a substance to undergo a change that alters its identity?
• Which term refers to extremely slow diffusion of particles within a solid?
• In a chemical equation, which term describes the substances on the left side before the reaction?
• Which type of data involves numeric measurements with a unit and a degree of uncertainty?
• At STP, how many liters does 2 moles of an ideal gas occupy?
• Which molecule has a double bond?
• What is the VSEPR shape around the central atom in CH4?
• A solution contains 8 g solute in 92.0 g total solution. What is the percent by mass of solute?
• Sodium metal (Na) is best classified as which category?
• A solution contains 8 g solute in 100 g solution. What is the percent by mass of solute?
• Charles' Law: If a gas' volume doubles from 2.0 L to 4.0 L at constant pressure, and initial temperature is 300 K, what is the final temperature?
• If a measurement is 12.345 cm with a precision of ±0.01 cm, what is the appropriate rounded value?
• What is defined as force per unit area, with P = F/A?
• The SI base unit for measuring the amount of substance is the ...
• Which statement is true about a pure substance?
• In an exothermic reaction, what does a calorimeter measure?
• What is the VSEPR shape around nitrogen in ammonia (NH3)?
• Observations generally accepted as true and universal, often mathematical; tells what happens but not why.
• Which expression describes the ideal gas law?
• FeCl3 is best described as which type of compound?
• When adding 12.3 g and 0.45 g, how many decimal places should the sum have?
• Avogadro's Number equals 6.02 × 10^23 particles. Which quantity does this number represent?
• What particle size range defines a colloid?
• Which statement best describes the trend of atomic radius across a period and down a group?
• Which term means the ability to cause change or do work?
• Which property can be observed or measured without changing the identity of the material?
• Water is an example of which category?
• Measure of Earth's gravitational attraction for matter.
• Theoretical yield is determined by which reagent in a reaction?
• What term describes energy due to an object's position or its composition?
• Which phrase describes vaporization that happens throughout the entire liquid at its boiling point?
• An atom with electron configuration 1s2 2s2 2p6 3s2 3p4 belongs to which element?
• Which term is a statement that can be tested by experiments and observations?
• Which of the following is a suspension example?
• Which is NOT a method of physical separation?
• What is calorimetry used to study?
• Molality is defined as which of the following?
• Which term describes separation of mixtures by physical means, such as filtration and evaporation?
• Which statement best describes filtration of a solution?
• What term describes a quantity that does not change in value?
• Which particle size range defines a solution?
• In a suspension, the particles are typically what size?
• Which term describes a chemical change that absorbs heat from the surroundings?
• Which statement correctly distinguishes elements from compounds?
• What is the bond order in dioxygen, O2?
• Which term describes the condition that nearly all substances are most dense in the solid form due to tighter particle packing?
• Weighted average atomic mass of chlorine given 75.77% 35Cl and 24.23% 37Cl.
• Which property describes that gases can be easily compressed due to the large amount of empty space between molecules?
• Define enthalpy change ΔH.
• Which statement distinguishes solutions from colloids in terms of light scattering?
• Distillation relies on differences in which property?
• Which term represents the amount of heat required to freeze 1 gram of a substance?
• If 0.200 kg of solvent has 0.50 mol solute dissolved, what is the molality of the solution?
• What term describes the transition from a liquid to a gas?
• Which statement reflects the principle that energy cannot be created or destroyed in ordinary changes but can be converted between forms?
• Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6?
• Which statement is true about a solution's separation on standing and filtration?
• Which equation expresses the relationship between energy and mass?
• Which physical property depends on the amount of matter present?
• Which of the following formulas represents ammonium sulfate?
• Which of the following is an example of an intensive physical property?
• Which term represents the amount of heat required to melt 1 gram of a substance?
• What is the density formula?
• Which of the following is a colloid example?
• Which formula corresponds to aluminum sulfate?
• A 0.40 L sample of a 1.50 M solution is diluted to 2.00 L. What is the final molarity?
• Which item is NOT a solution according to the examples?
• Why is carbon dioxide nonpolar despite polar bonds?
• If the volume halves from 4.0 L to 2.0 L at constant pressure and initial temperature is 450 K, what is the final temperature?
• Which state of matter has neither definite shape nor definite volume?
• More than one atom, element, or compound physically bound together.
• Which statement best describes a physical change?
• Balance the following equation: Fe + O2 → Fe2O3.
• What is the term for the temperature at which a liquid boils at one atmosphere?
• Which statement correctly describes density?
• Which term describes a homogeneous mixture with uniform composition?
• What type of bond forms between Na and Cl in NaCl?
• Matter that is uniform throughout is called which term?
• What is the name of the molecule CO2?
• Which term describes solids that generally do not flow, though some glass can flow very slowly over time?
• How many milliliters are in 2.50 L?
• The mass of one mole of a substance is called its?
• What is the energy of an object in motion called?
• Which of the following molecules is molecular rather than ionic?
• Which statement is true about physical separation methods?
• Which term describes the force of gravity on an object?
• Which of the following is a suspension example?
• Which term describes the movement of gas particles, with diffusion being much faster in gases than in liquids?
• What is 0.250 L in milliliters?
• Which term describes a pure substance that cannot be decomposed into anything else?
• Which state of matter has both a definite shape and a definite volume?
• A carefully thought-out plan/procedure for making observations and gathering data.
• Does a solution scatter light?
• Which equation expresses a direct proportional relationship using a constant ratio?
• The phrase 'Oxygen and ozone; gray tin and white tin' illustrates which concept?
• Which term describes a quantity that can change in value, such as temperature, mass, or volume?
• Which term describes a solid that lacks a crystalline pattern, such as glass?
• In the reaction 2 Al + 3 Cl2 -> 2 AlCl3, starting with 4.00 mol Al and 5.00 mol Cl2, what is the theoretical yield of AlCl3 in moles?
• Which term describes a substance that contains at least two elements chemically combined in fixed proportions?
• What term describes the transition from a liquid to a solid?
• Which statement correctly matches particle size ranges to phase?
• Which type of data includes observations such as color or texture?
• In the Lewis dot structure for water, which description best matches the molecule?
• The sum of the masses of all elements in the molecule is called the...
• In the reaction A + 2B → AB2, if you have 3.0 mol A and 4.0 mol B, which is limiting?
• Changes one variable at a time while recording effects and observations.
• If 1.00 mole of C2H6 combusts with excess O2, how many moles of CO2 are formed?
• Which process is vaporization that occurs throughout the liquid when it is at its boiling point?
• Using PV = nRT, how many moles are present when P = 1 atm, V = 24.0 L, T = 293 K?
• Avogadro's principle: At the same temperature and pressure, equal volumes of gases contain equal numbers of particles. What is the volume occupied by 1 mole of any gas at STP?
• Which term represents the amount of heat required to vaporize 1 gram of a substance?
• In calorimetry, the heat change for a reaction is measured by observing the temperature change of the surroundings. Which option best expresses this idea?
• Which subatomic particle determines the identity of an element (its atomic number)?
• Which term describes a change in which substances are converted into different substances with different properties?
• Substances that exist before a chemical change begin; appear on the left side of the yield arrow.
• Which of the following is an example of a colloid?
• Air is best described as which of the following?
• In the decomposition 2 KClO3 -> 2 KCl + 3 O2, if you start with 4.00 g KClO3 (M = 122.55 g/mol), how many grams of O2 can be produced?
• Measure of the quantity of matter.
• Which term names the rule that the same element in the same state can have different forms?