Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chem Final
Chemistry Quizes and mideterm
| Question | Answer |
|---|---|
| True or False: The liquid state of matter is compressible? | False, gas |
| True or False: A(n) element is a pure substance that is composed of only one kind of atom. | True |
| True or Fals: A homogenous mixture has a uniform composition. | True |
| True or False: The metric prefix milli means one thousand, or x10^3 | False, kilo |
| What is composed principally of atoms? | Matter |
| What kind of property demonstrates the ability of fluids to flow? | Physical |
| What order does the scientific method follow? | Observation, Hypothesis, Experiment, Theory, Law |
| What do the steps of the scientific method represent? | O: something you see, quantitative vs qualitative H: a possible explanation E: test T: A well tested hypothesis, most science is at this level L: equation, principle |
| Quantitative observations must include which two things? | A number and a unit of measurement |
| The appearance of a new color often accompanies what kind of change? | Chemical Change |
| How many cm are equivalent to 13.4km? Give answer in scientific notation. | 1.34 x 10^6 cm |
| How many sig figs does the number 0.0205600 contain? | 6 |
| True or False: The fact that methane (CH4) always contains 74.9% carbon by weight is an example of the Law of multiple proportions. | False, Definite Proportions |
| What number determines which element it is? | Atomic number |
| Do different isotopes of the same element have the same chemical or physical properties? | Chemical properties |
| Systematic errors lead to poor --- in a measurement and --- be minimized by averaging multiple repeated measurements. | accuracy, cannot |
| How many sig figs should the equation: 1.3250/0.0290x27.40 be rounded to? | 3 |
| According to the law of conservation of mass, in a chemical reaction mass is never: | created nor destroyed |
| How many neutrons are there in the nucleus of a 19^F atom? | 10 |
| How many square ft are equal to 1.40 square meters? Scientific notation | 1.51x10^1 ft^2 |
| What is the atomic number (Z) and Neutron number (N) of tin-118 (118^Sn)? | Z=50 and N=68 |
| Are most of the elements on the periodic table nonmetals, gases, or metals? | metals |
| As evident by its atomic mass, what is the most abundant isotope of aluminum? | 27^Al |
| What is the molar mass of FeCl3 in g/mol/ | 162.2 g/mol |
| What is the simplified empirical formula of cyclobutane(C4H8)? | CH2 |
| How many electrons are there in a 19^F- ion? | 10 electrons |
| Elements of the same --- tend to have similar chemical properties. | group |
| One mole of CH2Cl2 molecules contains how many moles of atoms? | 5 moles |
| The molarity of a solution is equal to the moles of --- divided by the total volume of the --- in liters. | solute, solution |
| What is the mass percent of sodium in sodium cyanide (NaCN) to the nearest 0.1%? | 46.9% |
| If an unknown compound contains 47.3% carbon, 10.6% hydrogen, and 42.1% oxygen by weight, what is its empirical formula? | C3H8O2 |
| What is expressed in units of hertz (Hz)? | The frequency of light |
| Visible light makes up a very large or very small portion of the EM spectrum? | very small |
| How can the particle like behavior of light be observed? | via the photoelectric effect |
| What is a statistical region of greatest electron density within an atom? | An orbital |
| What kind of light is composed of a mixture of all visible wavelengths? | White light |
| What is the energy of a photon directly proportional to? | Its frequency |
| In the Bohr model of an atom, an electron will both --- a photon of light when it transitions to a --- energy orbit. | absorb and emit, higher and lower |
| Which quantum number of the electron in a hydrogen atom determines its energy? | principal (n) |
| If Han Solo fires a laser blast with a total energy of 468kJ, and each photon has a frequency of 9.4x10^18s^-1, how many total photons did the blast contain? | 7.5x10^19 photons |
| What is the wavelength (in meters) of a 9.59 gram rifle bullet travelling at 853 meters per second? | 8.09x10^-38 m |
| How many "d" orbitals are there in each L=2 sublevel of an atom? | 5 orbitals |
| According to which principle can no two electrons in an atom have the same set of quantum numbers? | Pauli Exclusion |
| A phosphorous atom has how many valence electrons? | 5 |
| The effective nuclear charge (Z-sub-eff) of the elements tends to increase or decrease as you go from left to right across a period? | increase |
| Which quantum number of the electron in a hydrogen atom determines its energy? | principal (n) |
| Which principle (rule) says "it's impossible to know the energy and position of an electron simultaneously"? | Heisenberg's uncertainty principle |
| What is an allowed set of quantum numbers for an electron in the 2s orbital of an atom? n=2, l=?, m-sub-l= ? | n=2, l=0, m-sub-l= 0 |
| Nonmetals tend to be --- and have a --- Z(eff) than metal atoms. | smaller, higher |
| How many kiloJoules of energy are required to promote the electrons in 2.00 moles of hydrogen atoms all from the n=1 to the n=2 principal level? | 1,970 kJ |
| Write the full and abbreviated ground state electron configurations for a gallium atom. Also indicate how many valence and core electrons. | full: 1s2(2s2)2p6(3s2)3p6(4s2)3d10(4p1) abbreviated: [Ar] 4s2(3d10)4p1 valence: 3 e- core: 28 e- |
| What is anything that has mass and takes up space? | Matter |
| What is a geometric arrangement of atoms bonded together? | molecule |
| Boiling is an example of what type of change? Chemical or physical? | physical change |
| What does the metric prefix "centi" mean? | one hundredth |
| What is a positively charged ion called? | cation |
| What is a negatively charged ion called? | anion |
| Different isotopes of the same element have differing numbers of --- in their nuclei. | neutrons |
| According to the atomic mass, what is the most abundant isotope of phosphorous (P)? | 31^P |
| How many protons does a carbon-13 atom contain in its nucleus? | 6 protons |
| How many times larger is the molar mass of glucose (C6H12O6) compared to the molar mass of formaldehyde (CH2O)? | 6 times larger |
| The molarity of a solution is defined as moles of solute per liter of the ---? | solution |
| The plum pudding model of the atom was proposed following the discovery of the --- by JJ Thomson. | electron |
| Which state of matter has neither definite shape nor volume? | gas |
| Which of the following is a homogeneous mixture? 1M aqueous NaCl , dirt, NH3, Cl2 | 1 M aqueous NaCl |
| How many sig figs does the number 0.030060 contain? | 5 |
| An atom that has a mass of 75 and contains 42 neutrons would be which element? | arsenic |
| In a chemical reaction, matter is neither created nor destroyed but it is: | conserved |
| How many electrons will a 23^Na+ ion contain? | 10 |
| If 2.000 moles of solute are dissolved in 1.000 L of solvent, the concentration of the resulting solution will be: greater than, less than, or equal to 2.000 molar? | less than 2.000 molar |
| What is the mass of one mole of 13^C atoms? greater than, less than, or equal to 12.011 g? | greater than 12.011 g |
| To convert between the mass and volume of a substance what else do you need to know? | Its density |
| What was the first subatomic particle to be discovered in the form of cathode rays? | electron |
| Rutherford's gold foil experiment showed that most of the volume of an atom is: | empty space |
| Doc Brown needs to reach a speed of 88 miles per hour. What is this speed in meters per second? | 39 m/s |
| In a 56.3 g sample of phosphorous pentachloride (PCl5), How many moles of this compound are present? | 0.270 moles PCl5 |
| What is the mass percent of phosphorous to the nearest 0.1%? | 14.9% |
| If 801 mL of a 3.4M aqueous solution of potassium iodide (KI) is diluted with water to a new concentration of 1.6 M: What is the final volume of the solution in liters? | 1.7 L |
| If 801 mL of a 3.4M aqueous solution of potassium iodide (KI) is diluted with water to a new concentration of 1.6 M. the final volume of the solution in liters is 7.1 L. How many milliliters of water were added to accomplish the dilution? | 900 mL of water added |
| 87.42 grams of an unknown compound contains 60.19 g carbon, 4.33 g hydrogen, and the remaining mass is oxygen. What is the empirical formula? | C7H6O2 |
| 87.42 grams of an unknown compound. What is the density of the resulting solution in g/cm3 if the unknown sample is dissolved in 155.05 grams of ethanol (C2H6O) and the solution volume is 209 mL? | 1.16 g/cm3 |
Created by:
SeaJae1021
Popular Chemistry sets