front 1 Balance the following reaction: FeCl2 + O2 ---> FeO + Cl2 | back 1 2 FeCl2 + 1 O2 ---> 2 FeO + 2 Cl2 |
front 2 The formula for calcium phosphate is | back 2 Ca3(PO4)2 |
front 3 Water molecules (H2O) in ice have __________ kinetic energy (motion) than H2O molecules in the liquid or vapor state of matter | back 3 less |
front 4 If 0.274 moles of a substance weigh 62.5 g what is the molar mass of the substance, in units of g/mol? | back 4 2.28 x 10 2 g/mol |
front 5 What is the formula for the ionic compound formed by calcium ions and nitrate ions? | back 5 Ca(NO3)2 |
front 6 Determine the number of moles of aluminum in 96.7 g of Al. | back 6 3.58 mol |
front 7 A magnesium ion, Mg2+, has | back 7 12 protons and 10 electrons |
front 8 Kinetic energy of molecules describes their ___________. | back 8 motion, including their speed and the ways that they move |
front 9 Which is the percent composition of bromine in the compound NaBr? | back 9 77.7% |
front 10 Which is the correct molar mass of for the compound FeSO4? | back 10 151.85 g/mol |
front 11 Which of these quantities does NOT represent 1.00 mol of the indicated substance? | back 11 26.0 g Fe |
front 12 The correct name for NH4NO3 is | back 12 ammonium nitrate |
front 13 What happens to the volume of a balloon if you put a balloon inside of a vacuum chamber and decrease the pressure inside? | back 13 It gets larger |
front 14 What is the average mass, in grams, of one atom of iron? | back 14 9.28x10 -23 g |
front 15 How many moles of CF4 are there in 171 g of CF4? | back 15 1.94 mol |
front 16 How many molecules are in 4.39 g of CO2? | back 16 6.01x10 22 molecules |
front 17 The mass of 1.21x10 20 atoms of sulfur is | back 17 0.00644 g |
front 18 A covalent bond is between | back 18 two nonmetals |
front 19 What type of reaction is shown? MnOH + 2 KCl ---> MnCl2 + KOH | back 19 double replacement |
front 20 Which of the following statements is most accurate? | back 20 All of the above. |
front 21 What distinguishes the findings of Dalton from the findings of Democritus? | back 21 Dalton proved experimentally that atoms exist whereas Democritus believed in them based on philosophy. |
front 22 Which is the charge that results when phosphorus becomes an ion? | back 22 3- |
front 23 Which is the correct measurement for location marked by the arrow? | back 23 51.8 |
front 24 Which term is described as the lowest whole-number (most simplified) ratio of elements in a compound? | back 24 empirical formula |
front 25 The chemical formula for iron(II) nitrate is | back 25 Fe(NO3)2 |
front 26 Which element has a molar mass of 30.974 g/mol | back 26 phosphorus |
front 27 What is the percent mass of fluoride (F) in potassium fluoride (KF)? The molar mass of potassium (K) is 39.0983 and the molar mass of fluorine (F) is 18.998403 | back 27 32.7% |
front 28 An oxide ion, O2, has: | back 28 8 protons and 10 electrons |
front 29 According to Charles' Law, volume and temperature are directly proportional. This means that _________ | back 29 as temperature increases, volume increases |
front 30 The correct name for KOH is | back 30 Potassium hydroxide |
front 31 What description best describes the work of Democritus? | back 31 Democritus philosophized about the existence of atoms and believed that they exist. |
front 32 What is the formula for the ionic compound formed by magnesium and iodine? | back 32 MgI2 |
front 33 Group 16 (also known as 6A) elements tend to acquire which charge when they form ions? | back 33 2- |
front 34 What is the molar mass of acetaminophen, C8H9NO2? | back 34 151 g/mol |
front 35 Based on the mole ratios of the substances in a chemical reaction shown, which is the correct equation for the chemical reaction? | back 35 3A + 2B ---> C |
front 36 In which phase are the molecules of a sample held rigidly together? | back 36 Solid |
front 37 Which value has only 4 significant digits? | back 37 6.930 |
front 38 Which of the following is a synthesis reaction? | back 38 2CO + O2 ---> 2CO2 |
front 39 Consistent with vanadium being a transition metal, the name for VSO4 should be | back 39 Vanadium (II) sulfate |
front 40 The percent composition by mass of a compound is 76.0% C, 12.8% H, and 11.2% O. The molar mass of this compound is 284.5 g/mol. What is the molecular formula of the compound? | back 40 C18 H36 O2 |
front 41 If I have 3.25x10 23 molecules of magnesium, how many milligrams of magnesium is that? | back 41 13,121.4701 mg |
front 42 According to Boyle's Law, pressure and volume are inversely proportional. This means that | back 42 as volume increases, pressure decreases. |
front 43 How many molecules are there in 8.0 g of ozone, O3? | back 43 1.0x10 23 molecules |
front 44 All room temperature matter is composed of atoms and molecules that are always moving. | back 44 True |
front 45 The empirical formula of a compound of uranium and fluorine that is composed of 67.6% uranium and 32.4% fluorine is | back 45 UF6 |
front 46 Which of the following reactions is a combustion reaction? | back 46 C3H8 + 5O2 ---> 3CO2 + 4H2O |
front 47 Which of the following is a transition metal? | back 47 None of the other choices |
front 48 Calculate the molar mass of potassium permanganate KMnO4- | back 48 158 g |
front 49 What is the mass of 0.0250 mol P2O5? | back 49 3.55 g |