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Chemistry Practice Flashcards

Inayah Munaf Chemistry Inglés 193 fichas

Fichas del conjunto (193)

  1. 1A hypothesis is never wrong: T/Ffalse
  2. 2All things are made of atoms: T/Ftrue
  3. 3The law of conservation of mass states that matter can not be created or destroyed in a chemical reaction: T/Ftrue
  4. 43.4 x 10 -4 is the correct from for scientific notation: T/Ftrue
  5. 5An exact number has unlimited significant figures: T/Ftrue
  6. 6In this measurement 6.743 g the 4 is the estimated digit: T/Ffalse
  7. 7With addition and subtraction with measured numbers the result carries the same number of significant figures as the factor with the fewest figures: T/Ffalse
  8. 8a hypothesis that has been tested and validated over a long period of time is atheory
  9. 9Chemicals are present inhealth food, our bodies, paints, pesticides, drugs, weed killers
  10. 10Chemistry is a scientific discipline which _______is devoted to the study of matter and energy
  11. 110.001 = 10 -3 ? T/Ftrue
  12. 121000 mg = 1g is correct ? T/Ftrue
  13. 13Kilo has a multiplier of 1000: T/Ftrue
  14. 14The most common unit system in the US is the metric system: T/Ffalse
  15. 15There are 106 L in 1 μL: T/Ffalse
  16. 16V = m/D T/Ftrue
  17. 17cm3 = mL ? T/Ftrue
  18. 18d = v/m ? T/Ffalse
  19. 19m = d/v T/Ffalse
  20. 20units of density are g/cm3: T/Ftrue
  21. 21A chemistry book has a mass of 3.95 kg. What is this mass in pounds? (1 lb= 454 g)8.70 lbs
  22. 22A student measuring the density of a solution (d = 1.133 g/mol) reported the following results: 1.285, 1.287, 1.284, 1.283 Which of the following is the best description of the student's data?precise, inaccurate
  23. 23An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many oryxes can a zoo obtain in exchange for 15 flamingos?3 oryxes
  24. 24Convert 1.39 ft/s to meters per minute. (1 m = 39.37 in.)25.4 m/m
  25. 25How many μg are in 0.0158 g?1.58 × 104
  26. 26How many g are in 580.4 mg?0.5804
  27. 27In the metric system the prefix milli represents the multiple10-3
  28. 28Significant figures are important because they indicate __________the number of digits in a measurement
  29. 29The correct answer for the addition of 7.5 g + 2.26 g + 1.311 g + 2 g is ________13 g
  30. 30The number 680 000 000 expressed correctly using scientific notation is _______6.8 × 108
  31. 31What is the density of a substance with a mass of 45.00 g and a volume of 26.4 mL?1.70 g/mL
  32. 32What is the volume, in L, of a 64.0 fluid ounce bottle?1.89
  33. 33What is the width of a 3.5 in. computer diskette in cm? (1 in. = 2.54 cm)8.9
  34. 34Burning gasoline is example of a physical change: T/Ffalse
  35. 35Calorie = 1000 calories: T/Ftrue
  36. 36If it is 98 Fahrenheit outside it equal about 37 celsius: T/Ftrue
  37. 37In a chemical reaction mass is lost: T/Ffalse
  38. 38Liquid compresses easily: T/Ffalse
  39. 39Salt is an example of a crystalline solid: T/Ftrue
  40. 40The reaction of TNT is an example of a endothermic chemical reaction: T/Ffalse
  41. 41An energy diagram that shows the reactants having greater energy than the products illustrates an ________ reactionexothermic
  42. 42The energy stored in chemical bonds ispotential energy
  43. 43Water in a swimming pool contains dissolved sodium chloride and many other salts. Which of the following describes water in a swimming pool?homogeneous mixture
  44. 44What is the term for a change of state from a solid to a liquid?melting
  45. 45Which of the following describes a substance in the solid physical state?The substance has a fixed volume.
    The substance compresses negligibly.
    The substance has a fixed shape.
  46. 46Which of the following is an example of a chemical change?rusting
    burning
    exploding
  47. 47Which physical state demonstrates very low kinetic energy?solid state
  48. 48Which state of matter has indefinite shape and is compressible?gas
  49. 49According to Daltons Atomic Theory Atoms Combine in whole - number ratios ?: T/Ftrue
  50. 50Atomic number equals the number of protons or Z: T/Ftrue
  51. 51Bromine is a metal: T/Ffalse
  52. 52In an atom like charges attract: T/Ffalse
  53. 53neon is a noble gas: T/Ftrue
  54. 54Ruthford found that an atom is mostly empty spacetrue
  55. 55The electron was discovered by Rutherfordfalse
  56. 56Atomic mass has the unit of amu: T/Ftrue
  57. 57Cations are positive , and the protons are greater in number than the electrons ?: T/Ftrue
  58. 58Group 6A forms 2- ions normally ?: T/Ftrue
  59. 59Ions are charged particles where the protons ( +) and electrons (+) are equal: T/Ffalse
  60. 60Mass number is equal to the number neutrons plus elctrons ?: T/Ffalse
  61. 61A neutron has an electrical charge of ______0
  62. 62An atom is the smallest identifiable unit of a compound.: T/Ffalse
  63. 63Chromium is an example of an element that is a _____transition metal
  64. 64Electrons have an electrical charge of +1: T/Ffalse
  65. 65Elements in Group 7A are known as the ______halogens
  66. 66Fluorine forms an ion with a charge of _______-1
  67. 67In an atom, the nucleus contains _________all protons and neutrons
  68. 68Neutrons are found in the nucleus of the atom: T/Ftrue
  69. 69Oxygen is a __________ and nitrogen is a __________.nonmetal, nonmetal
  70. 70Sulfur is a non-metal: T/Ftrue
  71. 71The atomic number of an atom is equal to the number of ________protons
  72. 72The mass number of an atom can be calculated from the ________number of protons + neutrons
  73. 73You can continually divide matter into smaller and smaller pieces without ever coming to an end: T/Ffalse
  74. 74A consistent explanation of known observations that has undergone repeated scientific experimentation along with peer review are is calleda theory.
  75. 75A solid form of matter in which there is long range repeating order is called _____crystalline
  76. 76An atom containing 7 protons, 8 neutrons, and 7 electrons ischarge neural
  77. 77Bromine belongs to the ________ group of the periodic tablehalogen
  78. 78Convert 1.39 ft/s to meters per minute. (1 m = 39.37 in.) ( 12 inch = 1 ft )25.4
  79. 79Determine the answer for the equation below with correct number of significant figures: 3.215 × 13.2 ÷ 0.218 = ______195
  80. 80How many g are in 580.4 mg?0.5804 g
  81. 81How many kL does a 1.25 × 108 cL sample contain?1.25 × 103 kL
  82. 82How many m3 are there in 100. cm3?1.00 × 10-4
  83. 83How many mg does a 433 kg sample contain?4.33 × 108 mg
  84. 84How many protons and electrons are present in O2-?8 protons and 10 electrons
  85. 85How many protons and neutrons are in Cl-37?17 protons, 20 neutrons
  86. 86How many significant figures are in the measurement, 20.300 m?5
  87. 87atoms of the same element that have different number of neutrons areisotopes
  88. 88Lithium belongs to the ________ group of the periodic table.alkali metal
  89. 89Perform the indicated operations and express the answer in cm with the proper number of significant figures. 28.1 cm + 0.53 cm + 75.321 cm = ?104.0
  90. 90The correct decimal representation of 6.453 × 103 is:6,453
  91. 91The correct scientific notation for the number 0.00050210 is:5.0210 × 10-4
  92. 92The horizontal rows of the periodic table are calledperiods
  93. 93The mass number of an atom can be calculated from the _______number of protons plus neutrons
  94. 94What is the charge on the barium ion?2+
  95. 95What is the charge on the ion formed by aluminum?3+
  96. 96What is the value of 335 K on the Celsius temperature scale?62
  97. 97What is the volume, in L, of a 64.0 fluid ounce bottle?1.89
  98. 98What would be the volume, in mL, of 1000 g of ethanol if the density of ethanol is 0.789 g/mL?1.27 × 103
  99. 99When an atom loses an electron, the resulting particle is calleda cation
  100. 100Which of the following is a chemical? light heat sugar a wave noisesugar
  101. 101Which of the following is not an example of matter? atoms air water light woodlight
  102. 102Which of the following is the largest volume? 1 kiloliter 1 deciliter 1 milliliter 1 liter 1 decaliter1 kiloliter
  103. 103Which of the following processes does not represent a chemical change? dissolving sugar in water souring of milk iron rusting reaction of sodium metal with water heat is given off leaves changing colordissolving sugar in water
  104. 104Which state of matter has atomic spacing that is close together and definite shape?solid
  105. 105KNO3 would be classified as an ionic compound ?: T/Ftrue
  106. 106Na3PO4 contains three sodium , four phosophours , four oxygen: T/Ffalse
  107. 107The law of constant composition says compound like water will always be two hydrogen for one oxygen ?: T/Ftrue
  108. 108empirical formula gives the actual number of atoms of each element in a molecule of the compound: T/Fflase
  109. 109Chlorine as an ion is called chloride ?: T/Ftrue
  110. 110Group IA has metals from the perdoic table with invariant charge: T/Ftrue
  111. 111Pb and Sn are metals that can vary in charge that are not transition metals , but are treated like them for naming: T/Ftrue
  112. 112The formula of the ionic compound formed potassium and oxygen is K2O T/Ftrue
  113. 113The formula for acetate with charge is C 2 H 3 O 2 1- T/Ftrue
  114. 114Acid are molecular compounds that produce H+ ions in water ?: T/Ftrue
  115. 115hexa prefix means 7: T/Ffalse
  116. 116Molecular compounds contain metals ?: T/Ffalse
  117. 117Oxyacids are polyatomic ions with H+ right in front: T/Ftrue
  118. 118The formula mass of O2 is greater than O3 : T/Ffalse
  119. 119The unit for formula mass is the amu: T/Ftrue
  120. 120polyatomic ions that contain -ate become ous acid when naming ?: T/Ffalse
  121. 121Carbon is considered which of the following? molecular compound ionic compound Correct atomic element molecular element none of the aboveatomic element
  122. 122How many of each type of atom are there in the formula Ca3(PO4)2?Ca = 3, P = 2, O = 8
  123. 123How many oxygen atoms are in the formula Al2(CO3)3?9
  124. 124What is correct name of the compound whose formula is BF3 ?boron trifluoride
  125. 125What is the correct formula for a compound that has three oxygen atoms and one sulfur atom?SO3
  126. 126What is the correct formula for ammonium hydrogen sulfate?NH4HSO4
  127. 127What is the formula for an ionic compound made of barium and nitrogen?Ba3N2
  128. 128What is the formula for the acetate polyatomic ion?C2H3O2-
  129. 129What is the formula mass for potassium nitrate?101.10 amu
  130. 130What is the formula mass of sulfurous acid?82.08 amu
  131. 131What is the name of CoS?cobalt(II) sulfide
  132. 132What is the name of the ionic compound made of beryllium and chlorine?beryllium chloride
  133. 133What is the name of the molecular compound SF5?sulfur pentafluoride
  134. 134What is the proper name for this acid HBr?hydrobromic acid
  135. 135Avogadro's number is 6.022 x 10 23 T/Ftrue
  136. 136Mass percent can be over 100 % : T/Ffalse
  137. 137Molar mass is grams found in 1 mole of atoms of an element.: T/Ftrue
  138. 138Molar mass lets you convert from number of atoms to grams: T/Ffalse
  139. 1390.100 mol of lithium weighs ________0.694 g
  140. 1401.00 mol of sodium has a mass of ________23.0 g
  141. 141Calculate the mass percent composition of sulfur in Al2(SO4)328.12%
  142. 142Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.N2O3
  143. 143Determine the molecular formula for a compound that is 70.79% carbon, 8.91% hydrogen, 4.59% nitrogen, and 15.72% oxygenC18H27NO3
  144. 144Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of C2H5O2C6H15O6
  145. 145Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. The molecular weight is 194.19 g/mol.C8H10N4O2
  146. 146How many atoms of oxygen are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g/mol.1.10 × 1024 O atoms
  147. 147How many molecules of N 2 O 4 are in 76.3 g N2O4? The molar mass of N 2 O 4 is 92.02 g/mol.4.99 × 1023 N2O4 molecules
  148. 148The atomic mass of magnesium is 24.31 amu: T/Ftrue
  149. 149The units for molar mass are amu.: T/Ffalse
  150. 150Ice melting would be an example of a chemical reaction: T/Ffalse
  151. 151In a balanced equation the atoms in reactants must equal the atoms of the product: T/Ftrue
  152. 152The formation of a gas is a sign of a chemical reaction: T/Ftrue
  153. 153According to the solubility rules CaSO4 is soluble: T/Ffalse
  154. 154In a precipitation reaction a solid is formed from two aqueous solutions: T/Ftrue
  155. 155Salt water is an example of a aqueous solution ?: T/Ftrue
  156. 156Strong electrolytes do not produce ions in water when they dissociate: T/Ffalse
  157. 157CaO + CO2 → CaCO3 is a example of a synthesis reaction type: T/Ftrue
  158. 158In a Acid - Base reaction water is formed ?: T/Ftrue
  159. 159In an acid/base neutraization reaction and acid + base produce water and another base: T/Ffalse
  160. 160Oxidation is the loss of electrons by a substance in a chemical reaction ?: T/Ftrue
  161. 161A chemical equation is balanced when the number of ____ of each element is the same in reactants and products.atoms
  162. 162A strong electrolyte is one that __________ completely in solutionionizes
  163. 163In an oxidation-reduction reaction, the substance oxidized always shows a ____ of electronsloss
  164. 164What type of a reaction occurs when a potassium nitrate solution is mixed with a barium acetate solution?no reaction
  165. 165What type of reaction is the generic equationsynthesis/combination
  166. 166What type of reaction is the generic equationdouble-displacement
  167. 167When water is heated, bubbles form in the water. Is this evidence of a chemical reaction? Why?No, boiling water is a physical change
  168. 168A possible road map for a mass to mass problems is : Mass A → Moles A → Moles B→ Mass of A T/Ffalse
  169. 169It is possible to think of chemical reactions , just like cooks recipe: T/Ftrue
  170. 170To produce a mole to mole conversion one must have a balanced equation in a stoichiometry problems: T/Ftrue
  171. 171Actual yield is the amount of product actually produced by a chemical reaction: T/Ftrue
  172. 172If the sign for ΔH is positive this is an exothermic reation: T/Ffalse
  173. 173Limiting reactant is the reactant that makes the least amount of product: T/Ftrue
  174. 174Theorectical yield is the reactant that makes least amount of product: T/Ffalse
  175. 175An exothermic reaction has a negative enthalpy of reaction: T/Ftrue
  176. 176before determining convversion factors, it is necessary to make sure the equation is properly balanced: T/Ftrue
  177. 177How many eggs are needed to make 1 dozen waffles, assuming you have enough of all other ingredients? Given: 2 cups flour + 3 eggs + 1 tbs oil → 4 waffles9
  178. 178The actual yield is the same as the theoretical yield if the reaction goes to completion and there is no loss of product: T/Ftrue
  179. 179The limiting reactant determines what the actual yield is: T/Ffalse
  180. 180TeThe percent yield can never be greater than 100% : T/Ftrue
  181. 181Fe2(SO4)3 is called _______iron (III) sulfate
  182. 182How many of each type of atoms are there in the formula NH4C2H3O2?N = 1, H = 7, C = 2, O = 2
  183. 183In writing the chemical equation for a precipitation reaction, what abbreviation of the physical state must appear with one of the products?(s)
  184. 184The correct formula for copper (II) chloride is _______CuCl2
  185. 185What is correct name of the compound whose formula is N2O4?dinitrogen tetroxide
  186. 186What is the proper name for HBr (aq) ( this is an acid )hydrobromic acid
  187. 187B, Si, Ge, As, Sb, Te, At are a part of what group?metalloids
  188. 188H, C, N, O, F, He, Ne, P, S, Cl, Ar, Se, Br, Kr, I, Xe, Rn are a part of what group?nonmetals
  189. 189hit the mark multiple timesprecision
  190. 190how close you are to the targetaccuracy
  191. 191to find density:mass/volume
  192. 192to find volume:mass/density
  193. 193to find massdensity x volume

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Chemistry Fichas sobre Chemistry Practice Flashcards, creado por Inayah Munaf el 19/05/2020.
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Inayah Munaf
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  • Creado por Inayah Munaf · 18 nov 2017
  • Copiado por Inayah Munaf · 10 sep 2018
  • Copiado por Inayah Munaf · 19 may 2020
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