Georgia State University (GSU) CHEM 1211K Principles of Chemistry I Test 1 Practice Test

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• For the nuclide 25/12 X, how many protons, neutrons, and electrons does the neutral atom have?
• Energy is defined as _________________.
• The reaction Na + Cl2 → NaCl is an example of which type of chemical reaction?
• What is the oxidation state of chlorine in ClO4−?
• A material with variable composition that can be uniform or nonuniform is called
• For binary molecular compounds, which naming convention is correct?
• What is an ion?
• Which statement best defines molar mass?
• If an atom has 17 protons and a mass number of 35, how many neutrons does it have?
• Isotopes of the same element have different numbers of neutrons but the same number of protons.
• Hydrobromic acid has which chemical formula?
• Calculate the mass, in kilograms, of 4.87 × 10^25 atoms of zinc.
• How many grams are in 2 moles of Ca3(PO4)2?
• At STP, 22.4 L of a gas contains how many moles?
• When a metal forms ions, the resulting ion is typically what charge?
• Which energy form is stored due to position relative to others?
• Which statement best describes a gas?
• What is the formula mass (molar mass) of CO2?
• Which scientist proposed the Plum Pudding Model?
• What are the three states of matter?
• Isotopes are identified by their _______.
• What is the SI base unit for time?
• How many significant figures should the product of 4.560 and 0.03210 contain?
• Which statement correctly distinguishes electronegativity from electron affinity?
• Metals tend to form ions by which process?
• The mass of the electron as determined by the Oil Drop Experiment is
• Is NaCl soluble in water?
• Exact numbers have an unlimited number of __________.
• Density is defined as which of the following?
• A person weighs 72.6 kg. What is his weight in pounds?
• The atomic number equals the number of _______.
• What is the percent mass of calcium in Ca3(PO4)2?
• Which statement about mixtures is true?
• What term describes submicroscopic particles that are the building blocks of all matter?
• Which term is defined as a proposed explanation of observation?
• How many oxygen atoms are in one formula unit of sodium hydrogen phosphate, NaHPO4?
• On the Celsius scale, water freezes at 0°C and boils at 100°C. Which pair represents this correctly?
• On the Fahrenheit scale, water freezes at 32°F and boils at 212°F. Which of the following is true?
• How many electrons can occupy the second energy level (n = 2) in an atom?
• The total quantity of energy remains _________.
• Which statement correctly identifies kinetic energy?
• What is the formula mass of Na2CO3 (sodium carbonate)?
• What are the principal (n), azimuthal (l), and magnetic (ml) quantum numbers for a 2p electron?
• Which statement is true regarding exact numbers and significant figures?
• Which statement correctly differentiates mass number from average atomic mass?
• Which statement is true about the Law of Multiple Proportions?
• What is the overall charge of MgCl2 in the solid compound?
• Law of Conservation of Mass is associated with which scientist?
• What is the name of H2SO3?
• Precision refers to how close repeated measurements are to each other.
• Which energy form is associated with motion of particles and is often related to temperature?
• Define molarity.
• Which statement describes systematic error?
• Law of Definite Proportions states that
• How many liters of solution are required to dilute a 2.0 M solution from 0.750 L to 0.50 M?
• Which statement accurately describes Avogadro's number?
• Which statement is NOT part of Dalton's atomic theory?
• In one formula unit Ca3(PO4)2, how many phosphorus atoms are present?
• Which pair are metals?
• In one formula unit Ca3(PO4)2, how many calcium atoms are present?
• Gas burning is an example of _________________.
• Nonmetals typically end with which suffix in monoatomic anion names?
• An anion is
• Given gallium has two naturally occurring isotopes Ga-69 and Ga-71 with abundances 60.11% and 39.89% respectively and masses 68.9256 amu and 70.9247 amu, what is the atomic mass of gallium?
• Which term is defined as the science that seeks to understand the behavior of matter by studying the behavior of atoms and molecules?
• Group 8A elements, also known as noble gases, are
• What distinguishes a compound from a mixture?
• Iron rusting is an example of
• Which formula converts Celsius to Kelvin?
• Which statement about metals is true?
• Hydrates are compounds that have a specific number of water molecules attached to them. When hydrates are heated, what happens to the water molecules?
• How many moles of oxygen are in 3.20 moles of sodium hydrogen phosphate (NaHPO4)?
• Who conducted the Gold Foil Experiment?
• The scientist associated with the cathode ray is
• Evaporation of rubbing alcohol is an example of _____________.
• Acids are defined as which of the following?
• Potential energy is the energy stored in the matter due to ___________.
• Metalloids are characterized by
• A proposed explanation of an observation is called what?
• What is the SI base unit for temperature?
• Which type of chemical reaction is the formation of NaCl from Na and Cl2?
• Work is defined as ________.
• In the reaction 2 H2 + O2 → 2 H2O, how many grams of water are formed from 1.0 mole of H2 (O2 in excess)?
• Which statement defines molar mass?
• A change in appearance, but not in the composition of matter is a
• How many moles of PF3 contain 3.68 × 10^25 fluorine atoms?
• Using the given data, what is the approximate molar mass of H2?
• Which statement is true about the lengths of 1 meter and 1 yard?
• J. J. Thomson is known for discovering which particle?
• Law of Multiple Proportions states that
• If Celsius is 0, what is the corresponding Kelvin temperature?
• What is the SI base unit of mass?
• How many inches are in 1 yard?
• Kinetic energy is the energy of ___________.
• Which quantity is defined as the mass of one mole of a substance?
• Mass number is the sum of _______.
• If an element has two isotopes with masses 10.0 amu and 11.0 amu with natural abundances 0.40 and 0.60, what is the average atomic mass?
• How many significant figures are in 0.0045600?
• Which term describes two or more atoms held together by covalent bonds?
• Molarity is commonly expressed as which unit?
• The nucleus is positively charged because it contains which particles?
• Smallest identifiable unit of an element?
• What defines a covalent bond?
• Electrons _____ the nucleus.
• Chlorous acid is represented by which chemical formula in aqueous solution?
• Group 7A elements, the halogens, are best described as which type of elements?
• Which statement about density best describes it?
• What is the name of the acid HClO4?
• Which statement best describes a covalent bond?
• Convert 0.350 kilograms to grams.
• Which statement best describes metalloids?
• Which symbol represents the SI base unit for length?
• Separating water and sand by pouring out the water carefully is called
• Convert 3.50 m to centimeters.
• Absolute zero is the lowest possible temperature on the Fahrenheit or Celsius scales.
• Which subatomic particle carries a negative charge?
• What is the molar mass of CH4 (methane)?
• CaF2 contains calcium ions and fluoride ions in which ratio?
• A scientific law (principle) is defined as what?
• In one formula unit Ca3(PO4)2, how many oxygen atoms are present?
• Isotopes of an element differ in their number of _______.
• If 1.00 mole of Na2CO3 is used, how many grams does it weigh?
• What is the molarity of a solution made by dissolving 0.500 mole of NaCl in 1.50 L?
• How many total atoms are present in one formula unit Ca3(PO4)2?
• Which statement correctly describes the numerical relationship between atomic mass and molar mass for a given element?
• What is the electron configuration for neutral aluminum in its ground state, and how many unpaired electrons does it have?
• Which statement correctly defines atomic number, mass number, and the number of neutrons in an atom?
• How does atomic radius change across a period and down a group in the periodic table?
• Density is used to identify the types of matter.
• What is the charge on the sulfate ion in Fe2(SO4)3?
• Dry ice subliming is an example of _______________.
• Phosphorus acid has the chemical formula:
• The volume of hexane that has a mass of 7.63 g, given a density of 0.6548 g/mL, is:
• In the reaction aA + bB → products, what is the mole ratio of A to B?
• Which of the following best defines a mixture?
• Mass is an example of which type of property?
• Which statement describes a property of a solid?
• What is the chemical formula for calcium fluoride?
• Which statement best describes a covalent bond?
• What is the common oxidation state of alkaline earth metals in ionic compounds?
• How many protons does the As3- ion possess?
• The center of an atom is called the ____________.
• How many moles of potassium are contained in 200 g of potassium metal?
• Which formula represents the product formed in the reaction 2 H2 + O2 → 2 H2O?
• Which separation technique is used to separate liquids of different boiling points and collect the pure liquid by condensation?
• What is the mass percentage of sodium in NaCl?
• 1000 grams is equal to how many kilograms?
• The process that separates a solid from the liquid in a heterogeneous mixture by using a funnel.
• What is the correct name for Br2O?
• How many inches are in 1 meter?
• What is Avogadro's number and what does it represent?
• Which statement reflects Dalton's atomic theory?
• How many molecules are in one mole of any substance?
• What device is used to observe a cathode ray?
• Binary acids are named by which convention?
• Which statement best describes an ionic bond?
• Explain the relationship between atomic mass and molar mass.
• Calculate the molar mass of calcium phosphate, Ca3(PO4)2.
• A mixture that has uniform composition throughout is called
• How does first ionization energy typically change across a period and down a group?
• Which element has 33 protons?
• Which method uses differences in boiling points to separate liquids?
• Convert 350 g to kilograms.
• Which statement about metals is true?
• Which list correctly names the three states of matter discussed?
• Who performed the Oil Drop Experiment?
• What is the name of HBr (aq)?
• How many moles are in 1.00 g of H2?
• Density is an ___ property.
• How would you name the ionic compound NaCl?
• Changes in matter, both physical and chemical, result in ____________.
• What is the name of Fe2(SO4)3?
• Which of the following is an example of an extensive property?
• What term describes two or more atoms held together by covalent bonds?
• Which statement best describes a liquid?
• What is the approximate molar mass of zinc in g/mol?
• How many iron atoms are contained in 354 g of iron?
• A change in which the composition of matter changes is called
• What describes high potential energy?
• Nonmetals typically have which property?
• State the law of conservation of mass.
• What is the name of HNO3?
• Which of the following is a correct conversion factor relating yard to inches?
• How many grams are in 0.75 moles of H2O?
• Which separation technique involves letting a mixture stand and pouring off the liquid without disturbing the solid?
• Which formula converts Fahrenheit to Celsius?
• Which energy form is associated with the motion of atoms, molecules, and subatomic particles?
• The particles in the nucleus are collectively called _______.
• The center of an atom contains the entire mass and is positively charged. The term for this region is the _________.
• Which statement best describes a chemical change?
• Determine the volume of hexane that contains 5.33 × 10^22 molecules, given density 0.6548 g/mL and molar mass 86.17 g/mol.
• Accuracy is defined as how close a measured value is to the...
• Which state of matter assumes shape and volume of its container, is compressible, and flows easily?
• If an element has atomic number 6 and mass number 12, how many neutrons does it have?
• What unit expresses the molecular weight shown for CO2?
• All isotopes have the same number of ___________.
• What is the unit used for molar mass?
• What is a chemical bond?
• The quantity 105.99 g/mol is best described as which of the following?
• Avogadro's number represents the number of particles in one mole. What is its value?
• Group 2A elements (alkaline earth metals) are characterized as
• Which principle describes the energy never being created or destroyed, only transformed?
• What is the correct conversion for 1 inch in centimeters?
• The structure of the atom contains many ____________.
• Which term explains what nature does and why?
• A scientific theory is defined as what?
• What is the absolute zero value on the Fahrenheit scale?
• A molecular compound is defined as which of the following?
• Who proposed the Law of Definite Proportions?
• Chlorous acid corresponds to which formula?
• How is the average atomic mass calculated from isotopes?
• A pure substance is made of which of the following?
• In naming acids that contain oxygen, the suffix for the base name commonly ends with which letters?
• What is the SI base unit of length?
• What is the molecular weight of CO2?
• An unknown compound contains 2.64 g of carbon, 0.444 g of hydrogen, and 7.04 g of oxygen. What is its empirical formula?
• Which statement best describes random error?
• Group 1A elements (alkali metals) are characterized by
• Which of the following compounds has approximately 52% of its mass as carbon?
• At STP, one mole of an ideal gas occupies approximately how many liters?
• Cations are
• Which quantity is measured in meters?
• Which of the following represents the boiling point of water on the Fahrenheit scale?
• Energy is neither _______________.
• Which statement about solids and gases is true?