front 1 How many moles of carbon dioxide are in 211 g of carbon dioxide? 929 mol of CO2 0.209 mol of CO2 4.79 mol of CO2 167 mol of CO2 | back 1 4.79 mol of CO2 |
front 2 Which compound has the greatest number of valence electrons? H2S H2O NCl3 CF4 All of the molecules have the same number of valence electrons. | back 2 All of the molecules have the same number of valence electrons. |
front 3 What is the mass of 3.81 mol of PH3? 3.81 g 130. g 34.0 g 0.112 g 8.92 g | back 3 130. g |
front 4 A balanced chemical equation tells the number of ________ of each reactant that combine and the number of ________ of each product formed. moles; moles grams; moles grams; grams moles; grams | back 4 moles, moles |
front 5 Which chemical formula is correct? K2CN Ag(CH3CO2)2 Mg(OH)2 MgHCO3 More than one of the formulas is correct. | back 5 Mg(OH)2 |
front 6 Beaker A contains 1 mole of iron atoms, and Beaker B contains 1 mole of lead atoms. Which statement concerning these two samples is known with certainty? Beakers A and B contain equal masses of atoms. Beakers A and B contain samples with the same molar mass. Beakers A and B contain an equal number of atoms. Beakers A and B contain an equal volume of atoms. | back 6 Beakers A and B contain an equal number of atoms. |
front 7 Which one is not a pure substance? copper metal Water sodium chloride Apple juice gold | back 7 Apple juice |
front 8 Which pair of elements will form an ionic compound? Copper and iron Sulfur and oxygen Iron and chlorine Bromine and oxygen | back 8 iron and chlorine |
front 9 A patient's urine sample has a density of 1.02 g/mL. If 1250 mL of urine was excreted by the patient in one day, what mass of urine was eliminated? 1.28 kg 1275 g 128 g 1225 g | back 9 1.28 kg |
front 10 Which of the following compounds is not classified as covalent? SF6 MgCl2 PBr3 CH4 None of the choices are correct. | back 10 MgCl2 |
front 11 If a piece of rock has a volume of 0.73 L and a mass of 1524 g, what is the density of the rock in g/mL? 2.1 × 103 g/mL 4.8 × 10–4 g/mL 2.1 g/mL 0.48 g/mL 2.088 g/mL | back 11 Volume of a Rock- 0.73 Mass of a Rock- 1524 M/V 2.1 g/mL |
front 12 When 4.870 × 103 is correctly converted to its standard form the number becomes ________. 0.004870 0.00487 0.0004870 4870. 4870 | back 12 4870. |
front 13 The correct name for Ag2O is ________. silver (I) oxide silver oxide disilver oxide silver (II) oxide | back 13 silver oxide |
front 14 When forming ions, metals typically do which of the following? Gain electrons to form anions Lose electrons to form positively charged ions Lose electrons to form negatively charged ions Gain protons to form cations | back 14 Lose electrons to form positively charged ions |
front 15 How many moles of sulfur trioxide are formed from 3 moles of sulfur
dioxide using the given balanced equation? 1 mol of SO3 3 mol of SO3 2 mol of SO3 5 mol of SO3 6 mol of SO3 | back 15 3 mol of SO3 |
front 16 When forming ions, metals typically do which of the following? Gain electrons to form anions Lose electrons to form positively charged ions Lose electrons to form negatively charged ions Gain protons to form cations | back 16 Lose electrons to form positively charged ions |
front 17 Which element is chemically similar to lithium? Sulfur Potassium Iron Magnesium Lanthanum | back 17 Potassium |
front 18 Which element is an s block element? Ar He SLa None of these elements is an s block element. | back 18 He |
front 19 Which reaction is a double displacement reaction? 2 H2 + O2 → 2 H2O3 Mg + Fe2O3 → 2 Fe + 3 MgO 3 Ca(OH)2 + Al2(SO4)3 → 3 CaSO4 + 2 Al(OH)3 2 KBr + Cl2 → 2 KCl + Br2 | back 19 3 Ca(OH)2 + Al2(SO4)3 → 3 CaSO4 + 2 Al(OH)3 |
front 20 Which element is most likely to be a good conductor of electricity? Ar O F Ni N | back 20 Ni Nickel |
front 21 Which statement concerning the ion Li+ is correct? Li+ has two total electrons. Li+ has an octet of electrons in its valence shell .Li+ is formed when a lithium atom gains one proton. Li+ is formed when a lithium atom gains one electron. | back 21 Li+ has two total electrons. |
front 22 Which element has the following orbital diagram? C O N Li | back 22 O |
front 23 Which statement best explains the basis for the octet rule? Atoms are most stable with eight protons in their nucleus. Atoms lose, gain, or share electrons to become a stable, noble gas. Atoms are most stable when they have eight bonds. Atoms are most stable with eight electrons in their valence shell and the electron configuration of a noble gas. | back 23 Atoms are most stable with eight electrons in their valence shell and the electron configuration of a noble gas. |
front 24 Carry out the following calculation and report the answer using the proper number of significant figures: 38.001 + 10.1 48.101 48.10 48.1 48.2 | back 24 48.1 |
front 25 Carbon tetrachloride has ________ valence electrons. 8 (eight) 40 (forty) 32 (thirty-two) 24 (twenty-four)4 (four) | back 25 32 (thirty-two) |