Search
Info
Warning
Danger

Study Resources (Chemistry)

41) Which statement is true about network solids? A) They have extremely high melting points. B) They are covalent substances. C) They are large network molecules held by covalent compounds. D) All of the above are true. 42) Which of these has the highest melting point? A) diamond B) iron C) sodium D) bromine 43) Which of the following influences.
0 Views
View Answer
81) Which contains the least % of oxygen? A) H2O2 B) Na2O2 C) HgO D) CO2 82) Which contains the highest % of hydrogen? A) HCl B) H2SO4 C) H3PO4 D) H2O 83) Which contains the lowest % of hydrogen? A) HCl B) H2SO4 C) H3PO4 D) H2O 84) Which of the following compounds has its carbon composition equal to 52.2%? A) C2H6O B) CH3Cl C) C4H8O2N2S D) C10H20O4N2S 85).
1 Views
View Answer
9.4   Matching Questions Match each compound in the questions with the corresponding number of atoms per formula unit in the list below. A) 19 B) 17 C) 23 D) 13 E) 22 1) (NH4)3PO3 2) Al2(SO4)3 3) Ca3(PO4)2 4) K4Fe(CNO)6 5) Al (C2H3O2)3 Match each compound in the questions with its corresponding molecular mass in the list below.   A) 310 B) 88 C) 122.5 D) 342   6).
0 Views
View Answer
8.2   True/False Questions 1) Bond breaking releases energy. 2) Bond formation releases energy. 3) Another term for the combination reaction is synthesis. 4) In a combustion reaction, oxygen is typically one of the reactants. 5) In a decomposition reaction one compound breaks down into two or more simpler compounds or elements. 6) In a decomposition reaction.
0 Views
View Answer
11) Which of the following chemical substances would you expect to exhibit the greatest degree of hydrogen bonding? A) methyl chloride, CH3Cl B) methyl alcohol, CH3OH C) octane, C8H18 D) methane, CH4 12) Which of the following chemical substances would you expect to exhibit a degree of hydrogen bonding? A) NH3 B) CH3OH C) HF D) all of the.
0 Views
View Answer
10.1   Multiple-Choice Questions 1) What is the oxidation state of manganese in the compound KMnO4? A) +4 B) +2 C) +7 D) -4 2) What is the oxidation state of chromium in the compound K2Cr2O7? A) +4 B) +6 C) +7 D) -1 3) Which atom in the compound K2C2O4 has a positive oxidation state? A) potassium B) carbon C) both potassium and carbon D).
3 Views
View Answer
Match each compound in the questions with the corresponding nitrogen % composition that appears in the list below.   A) 7.7% B) 63.6% C) 29.2% D) 30.4%   10) N2O 11) NO2 12) (NH4)2CO3 13) C18H26O4N2S 14) Ca(CN)2 Match each compound in the questions with the corresponding sulfur % composition that appears in the list below.   A) 41.0% B) 8.7% C) 22.6% D) 40.6%   15) Na2S 16) Na2SO4 17).
0 Views
View Answer
61) If the empirical formula of a compound is CH2O and the molecular weight is 180, the molecular formula is ________. A) CH2O B) C2H4O2 C) C3H6O3 D) C6H12O6 62) Which of the following has its empirical formula different than its molecular formula? A) CH2S B) C2H7N3 C) C3H6N3 D) C5H7O3 63) Which of the following pairs does not share.
0 Views
View Answer
51) Which hydroxide is water soluble? A) lead (II) hydroxide B) magnesium hydroxide C) calcium hydroxide D) lithium hydroxide 52) Which chloride is water soluble? A) lead (II) chloride B) calcium chloride C) mercury (I) chloride D) silver (I) chloride 53) Which sulfate is water insoluble? A) ammonium sulfate B) strontium sulfate C) sodium sulfate D) potassium sulfate 54) Which sulfate is water soluble? A) calcium.
0 Views
View Answer
7.4   Matching Questions Match the description of processes that appear in the questions  with the corresponding change of states in the list below.   A) evaporation B) freezing C) condensation D) sublimation E) melting   1) liquefaction of butter on hot bread 2) "disappearance" of mothballs 3) water boiling 4) ice formation on a pond during winter 5) collection of water droplets on.
0 Views
View Answer
111) The theoretical number of carbon dioxide moles produced from 6 moles NaHCO3 is ________. A) 1 B) 3 C) 6 D) 12 112) The theoretical number of moles of water produced from 8 moles NaHCO3 is ________. A) 2 B) 4 C) 8 D) 16 113) What is the theoretical mass of carbon dioxide produced from four moles of.
0 Views
View Answer
    121) The balanced equation involves the corresponding coefficients ________. A) 1: 9: 6: 7 B) 1: 10: 6: 7 C) 2: 19: 6: 7 D) 2: 21: 6: 7 122) The theoretical number of carbon dioxide moles produced from 3 moles C6H14 is ________. A) 3 B) 6 C) 9 D) 18 123) The theoretical number of water moles produced.
0 Views
View Answer
7.2   True/False Questions 1) The melting and freezing points are identical for the same compound. 2) At the freezing point the molecules are effectively frozen in place. 3) Solid carbon dioxide is also known as dry ice. 4) The freezing point of dry ice is 0 °C. 5) The attractive forces between carbon dioxide molecules.
0 Views
View Answer
7.3   Short Answer Questions Identify the following crystalline solids as ionic, molecular, or metallic.   1) calcium chloride, CaC12 2) glucose, C6H12O6 3) chromium, Cr 4) iodine, I2 5) copper (II) carbonate, CuCO3 (or cupric carbonate Based upon the formulas and melting points, decide whether each of the following crystalline substances should be classified as ionic, molecular, metallic.
0 Views
View Answer
7.1   Multiple-Choice Questions 1) Which of the three phases of matter (solid, liquid, or gas) has particles moving at the highest average velocity? A) solid B) liquid C) gas D) The particles in all three phases have about the same average speed. 2) Which of the three phases of matter (solid, liquid, or gas) has particles.
2 Views
View Answer
8.1   Multiple-Choice Questions 1) Which of the following statements is correct about a superconductor? A) It possesses the extraordinary property, when cooled, to have a magnet float as if defying gravity. B) It conducts electricity with zero resistance. C) It prevents magnetic field lines from penetrating it. D) All of the above statements are correct.
3 Views
View Answer
11) What is oxidation? A) loss of electrons B) increase in oxidation number C) gain of electrons D) two of the above 12) A fuel cell is essentially a battery which uses the following reaction to produce electricity: 2H2 + O2 → 2H2O.  What is happening at the cathode of such a fuel cell? A) Hydrogen is.
2 Views
View Answer
8.3   Matching Questions Match every equation in the questions with its type that appears in the list below.   A) Combustion B) Double replacement C) Combination D) Decomposition E) Single replacement F) Precipitation   1) H2SO4 + NaOH → Na2SO4 + H2O 2) Mg + HCl → H2 + MgCl2 3) CH4 + O2 → CO2 + H2O 4) NaClO3 → NaCl +.
0 Views
View Answer
9.3   Short Answer Questions 1) Determine the number of grams of copper present in a 4.0 kg sample of the mineral chalcopyrite (CuFeS2). 2) Determine the amount of carbon (in grams) present in 0.525 grams of benzoic acid (C7H6O2). 3) Determine the amount of oxygen present (in grams) in 1.00 grams of the.
0 Views
View Answer
Predict whether each of the compounds listed in the questions is water soluble or insoluble.   A) water soluble B) water insoluble   19) potassium nitrate 20) silver (I) chloride 21) lithium acetate 22) lead (II) sulfate 23) cobalt (II) sulfide 24) potassium bromide 25) ammonium phosphate 26) barium carbonate 27) aluminum hydroxide 28) calcium sulfate .
0 Views
View Answer
Match each compound in the questions with the corresponding carbon % composition that appears in the list below.   A) 33.6% B) 69.0% C) 55.6% D) 41.8% E) 48.7%   19) C6H8NCl 20) C3H10N2 21) C4H8Cl2O 22) C6H8O2N2S 23) C10H6O3 Match each compound in the questions  with the corresponding oxygen % composition that appears in the list below.   A) 50.0% B) 43.8% C) 18.6% D) 26.1% E) 27.6%   24).
0 Views
View Answer
101) A compound has the following elemental composition: C= 58.8%, H= 13.8%, N= 27.4%. The empirical formula of this compound is ________. A) C5H14N B) C5H10N2 C) C5H14N2 D) C5H15N2 102) The empirical formula for a compound that is 48.7% C, 13.6H and 37.8%N is ________. A) C4H9N2 B) C3H8N C) C3H10N2 D) C4H10N 103) Combustion of 6.51 mg of.
0 Views
View Answer
Match each of the substances in the questions with the STRONGEST type of bonding that it exhibits from the list below.   A) London forces B) metallic C) network covalent bonding D) hydrogen bonding   12) water 13) carbon tetrabromide 14) iron 15) hydrogen fluoride 16) carbon tetrachloride 17) quartz 18) ammonia 19) diamond 20) graphite 21) boron trifluoride 22) titanium 23) methane 24) sodium .
0 Views
View Answer
Match each of the acid-base pairs in the questions with the relative neutralization ratio that appears in the list below.   A) 3:1 B) 1:1 C) 2:1 D) 1:2 E) 1:3     29) potassium nitrate 30) silver (I) chloride 31) lithium acetate 32) lead (II) sulfate 33) cobalt (II) sulfide 34) potassium bromide Match each of the acids that appears in the questions with.
0 Views
View Answer
11) All hydroxides are water insoluble 12) Silver (I) chloride is water insoluble while silver (I) acetate is water soluble. 13) Only the halides of lead (II) and silver (I) are water insoluble. 14) Ammonium phosphate is water soluble but ammonium carbonate is water insoluble. 15) The coefficients in the balanced equation Au2S3 +.
0 Views
View Answer