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CHEMISTRY ch. 1-3
chem ch. 1-3
| Question | Answer |
|---|---|
| Chemistry is the study of | matter |
| Matter is anything that has | mass and volume |
| Which state of matter has no definite shape or volume? | gas |
| How could you convert a gas to a solid? | increase the pressure |
| pecan pie is a | heterogeneous mix |
| Dry ice is solid carbon dioxide (CO2). Dry ice is a(n) | compound |
| Which property below is an example of a chemical property? | reactivity |
| Which change below is a chemical change? | burning |
| 325 K = | 126 F |
| When a sample is placed on a digital balance, the display reads 25.34 g. What number would you record as the mass? | 25.34g |
| Which measurement is a correct measurement from a meter stick? | 18.31cm |
| Which measurement is a correct measurement from a 100 mL graduated cylinder? | 44.1 mL |
| Drew Bledsoe, threw 70 passes. He completed 45 of the passes. What was the percentage of completed passes, to the correct number of significant figures? | 64%, 64.3%, 64.29% all of the above |
| Compared to 25 cm, 25.00 cm is | 100 times more precise |
| what's the purpose of sig figs | to maintain correct levels of precision |
| The density of of aluminum is 2.70 g/mL. What is the volume of 27 g of aluminum? | 10mL |
| How many centimeters are in 1 km | 100,000 |
| Suppose you have three samples, A, B and C. They all have the same mass but the volumes are different; the volume of A is less than the volume of B and the volume of B is less than the volume of C. Which statement below must be true? | The density of A is greater than the density of B or C. |
| How many grams are in 12 lbs? | 5.5 x 10^3 g |
| How many feet are in 25 cm? | 0.82ft |
| One kg = | 1 x 10^3 g |
| Choose the answer that is not correct. 25 cm3 is equal to | 2.5 mL |
| What speed is 65 miles per hour (mph) in feet per second (ft/s)? | 95 ft/s |
| Osmium is the most dense element; its density is 22.56 g/mL. How many pounds are in 2.0 L of osmium? | 99 lbs |
| At what temperature are the Kelvin and Fahrenheit scales the same? | 574 |
| Whose theory of the atom says that pure vitamin C isolated from an orange is the same as pure vitamin C made in a lab? | John Dalton |
| Who performed the "gold-foil" experiment that proved the nuclear model of the atom? | Ernest Rutherford |
| Who discovered the electron and said electrons are distributed in the atom like plums in plum pudding? | JJ Thomson |
| Who first calculated the charge of an electron in his "oil-drop" experiment? | Robert Millikan |
| What's the best description of the atom? | small, massive, positively-charged nucleus surrounded by a large cloud of electrons |
| How many protons, electrons and neutrons are in 13C? | 6 protons, 6 electrons and 7 neutrons |
| How many protons, electrons and neutrons are in 44Ca+2? | 20 protons, 18 electrons and 24 neutrons |
| Which particle determines the identity of an element? atomic number | proton |
| Which atom contains 9 protons, 10 electrons and 10 neutrons? | 19F- |
| The first isotope has a mass of 115.30 amu and a natural abundance of 60.11 %. The other isotope has a mass of 117.55 amu and a natural abundance of 39.89 %. What is the atomic mass of this hypothetical new element? | 116.20 amu |
| Elements in the Periodic Table are in order of increasing | atomic number |
| Which list of terms below accurately describe Xenon (Xe)? | nonmetal, noble gas |
| How many periods and groups are in the periodic table? | 7 periods and 18 groups |
| Which element is a solid at room temperature and pressure? | tungsten, W |
| which element is the most reactive? | fluorine |
| Which pair of elements have the most similar chemical and physical properties? | Li, Na |
| How many moles are in 24g of Carbon | 2.0 |
| Which sample contains the largest number of atoms? | 12g Carbon |
| How many atoms are in 15 g of potassium? | 2.3 x 1023 |
| Which group of elements is not matched to its correct ionic charge? | Noble Gases, -2 |
| The bonding in the compound TiO2 is best described as | ionic |
| What's the chemical formula for aluminum sulfide? | Al2S3 |
| How many nitrogen atoms are in (NH4)3PO4? | 3 |
| How many hydrogen atoms are in 90. g of C2H6? | 1.1 x 10^25 |
| Determine the empirical formula of the compound that contains 85.7 % C and 14.3 % H. | CH2 |
| Determine the empirical formula of the compound that is 29.4 % calcium, 23.6 % sulfur and 47.0 % oxygen. | CaSO4 |
| What is the name of NaCH3COO? | sodium acetate |
| What's the name of MgF2? | magnesium fluoride |
| What's the mass of carbon in 15 g of C8H18? | 13g |
| All the elements listed below are diatomic except | helium |
| What's the chemical formula for dicarbon tetrahydride? | C2H4 |
| Suppose the empirical formula of a compound is BH3 and its molar mass is 27.6 g/mol. What is the molecular formula of this compound? | B2H6 |
| What's the name of N2O4? | dinitrogen tetroxide |
| How many molecules of SF4 are in 25 g of SF4? | 1.4 x 10^23 |
| Which statement about 1.00 mol of C8H10N4O2 (caffeine) is true? | It contains 96 g of carbon. |
| H2O is commonly called water. What's another name for H2O? | dihydrogen monoxide |
| What's the chemical formula for calcium phosphate? | Ca3(PO4)2 |
| What's the name of CuS? | copper(II) sulfide |
| What's the chemical formula for tin(IV) oxide? | SnO2 |
| What's the name of CuSO4? | copper(II) sulfate |
| Which compound below contains covalent bonds? | XeO2 |
| Chemistry is the study of | matter |
| Matter is anything that has | mass and volume |
| Which state of matter has no definite shape or volume? | gas |
| How could you convert a gas to a solid? | increase the pressure |
| pecan pie is a | heterogeneous mix |
| Dry ice is solid carbon dioxide (CO2). Dry ice is a(n) | compound |
| Which property below is an example of a chemical property? | reactivity |
| Which change below is a chemical change? | burning |
| 325 K = | 126 F |
| When a sample is placed on a digital balance, the display reads 25.34 g. What number would you record as the mass? | 25.34g |
| Which measurement is a correct measurement from a meter stick? | 18.31cm |
| Which measurement is a correct measurement from a 100 mL graduated cylinder? | 44.1 mL |
| Drew Bledsoe, threw 70 passes. He completed 45 of the passes. What was the percentage of completed passes, to the correct number of significant figures? | 64%, 64.3%, 64.29% all of the above |
| Compared to 25 cm, 25.00 cm is | 100 times more precise |
| what's the purpose of sig figs | to maintain correct levels of precision |
| The density of of aluminum is 2.70 g/mL. What is the volume of 27 g of aluminum? | 10mL |
| How many centimeters are in 1 km | 100,000 |
| Suppose you have three samples, A, B and C. They all have the same mass but the volumes are different; the volume of A is less than the volume of B and the volume of B is less than the volume of C. Which statement below must be true? | The density of A is greater than the density of B or C. |
| How many grams are in 12 lbs? | 5.5 x 10^3 g |
| How many feet are in 25 cm? | 0.82ft |
| One kg = | 1 x 10^3 g |
| Choose the answer that is not correct. 25 cm3 is equal to | 2.5 mL |
| What speed is 65 miles per hour (mph) in feet per second (ft/s)? | 95 ft/s |
| Osmium is the most dense element; its density is 22.56 g/mL. How many pounds are in 2.0 L of osmium? | 99 lbs |
| At what temperature are the Kelvin and Fahrenheit scales the same? | 574 |
| Whose theory of the atom says that pure vitamin C isolated from an orange is the same as pure vitamin C made in a lab? | John Dalton |
| Who performed the "gold-foil" experiment that proved the nuclear model of the atom? | Ernest Rutherford |
| Who discovered the electron and said electrons are distributed in the atom like plums in plum pudding? | JJ Thomson |
| Who first calculated the charge of an electron in his "oil-drop" experiment? | Robert Millikan |
| What's the best description of the atom? | small, massive, positively-charged nucleus surrounded by a large cloud of electrons |
| How many protons, electrons and neutrons are in 13C? | 6 protons, 6 electrons and 7 neutrons |
| How many protons, electrons and neutrons are in 44Ca+2? | 20 protons, 18 electrons and 24 neutrons |
| Which particle determines the identity of an element? atomic number | proton |
| Which atom contains 9 protons, 10 electrons and 10 neutrons? | 19F- |
| The first isotope has a mass of 115.30 amu and a natural abundance of 60.11 %. The other isotope has a mass of 117.55 amu and a natural abundance of 39.89 %. What is the atomic mass of this hypothetical new element? | 116.20 amu |
| Elements in the Periodic Table are in order of increasing | atomic number |
| Which list of terms below accurately describe Xenon (Xe)? | nonmetal, noble gas |
| How many periods and groups are in the periodic table? | 7 periods and 18 groups |
| Which element is a solid at room temperature and pressure? | tungsten, W |
| which element is the most reactive? | fluorine |
| Which pair of elements have the most similar chemical and physical properties? | Li, Na |
| How many moles are in 24g of Carbon | 2.0 |
| Which sample contains the largest number of atoms? | 12g Carbon |
| How many atoms are in 15 g of potassium? | 2.3 x 1023 |
| Which group of elements is not matched to its correct ionic charge? | Noble Gases, -2 |
| The bonding in the compound TiO2 is best described as | ionic |
| What's the chemical formula for aluminum sulfide? | Al2S3 |
| How many nitrogen atoms are in (NH4)3PO4? | 3 |
| How many hydrogen atoms are in 90. g of C2H6? | 1.1 x 10^25 |
| Determine the empirical formula of the compound that contains 85.7 % C and 14.3 % H. | CH2 |
| Determine the empirical formula of the compound that is 29.4 % calcium, 23.6 % sulfur and 47.0 % oxygen. | CaSO4 |
| What is the name of NaCH3COO? | sodium acetate |
| What's the name of MgF2? | magnesium fluoride |
| What's the mass of carbon in 15 g of C8H18? | 13g |
| All the elements listed below are diatomic except | helium |
| What's the chemical formula for dicarbon tetrahydride? | C2H4 |
| Suppose the empirical formula of a compound is BH3 and its molar mass is 27.6 g/mol. What is the molecular formula of this compound? | B2H6 |
| What's the name of N2O4? | dinitrogen tetroxide |
| How many molecules of SF4 are in 25 g of SF4? | 1.4 x 10^23 |
| Which statement about 1.00 mol of C8H10N4O2 (caffeine) is true? | It contains 96 g of carbon. |
| H2O is commonly called water. What's another name for H2O? | dihydrogen monoxide |
| What's the chemical formula for calcium phosphate? | Ca3(PO4)2 |
| What's the name of CuS? | copper(II) sulfide |
| What's the chemical formula for tin(IV) oxide? | SnO2 |
| What's the name of CuSO4? | copper(II) sulfate |
| Which compound below contains covalent bonds? | XeO2 |
Created by:
tbmartin2
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