General Questions and Answers

1Z0 Which response includes all the following II 2K o 0 OS 1 N7 squiod 001 that are others O 7 00 110 00 11 111 s 17 10 S II 10119 sus AI HOM9 1 A 5KCIKCIO 31 oxidation reduction reactions and i 1 II and V only Ajuo Al pue III II Z 3 1 and V only 4 Another one or another combination 5 I and IV only

003 part 1 of 3 10 0 points Determine the oxidation state of the metal in Cas 1 Cd 5 2 Cd 4 3 Cd 2 4 Cd 3 5 Cd 1 ZORAME 004 part 2 of 3 10 0 points Determine the oxidation state of the metal in ZnS 1 Zn 3 2 Zn 2 TOOT

Which of the following acids are strong acids a H SO4 b H S C HNO f HCIO4 8 HF h HCIO2 A a b d i B a d e f C a d f j OD a d g h OFb d HCI i H SO3 e HNO3 j HC H3O

What is the oxidation number of phospho rus in white phosphorus 1 2 2 5 3 3 6 None of these

10 0 points Rust occurs when iron reacts with oxygen and water to form iron III hydroxide What is the coefficient of iron in the balanced equa tion 1 None of these 6 6 10 12

10 0 points Copper reacts with hot concentrated sulfuri acid to form copper II sulfate sulfur dioxide and water What is the coefficient of H SO in the balanced equation

In the reaction below what would be the mass of the product 2H O 2H2 O2 4 0g 32 0g O 8 0 g O 28 0 g O 36 0 g O 128 0 g

The decomposition of NF3 into its elements will produce which two products NF3 unbalanced ON ON OF OF OF

F 1 points To correctly balance the half reaction Se Se what would you need to add 1 two electrons to the left 2 two protons to the right 3 two protons to the left 4 None of the answers is correct 5 two electrons to the right

Consider the following redox reaction Mn CO MnO C 0 What is the coefficient for OH when this reaction is balanced in base using the smallest possible integer coefficients 1 The correct coefficient is NOT given 7 1 8 0

12 2 points Would AuCl3be more soluble in a polar or nonpolar solvent Nonpolar Polar

CH3CH OH 302 2CO 3H O What would be the limiting reactant in the reaction if 1 mole of oxygen gas and 1 mole of ethanol CH3CH OH reacted with each other

1 Li O H O 2LIOH 2 CaC 2H O C H Ca OH Double Displacement Decomposition 3 2 Fe OH Fe O3 3H O 4 2 Pb NO3 2 PbO 4NO 0 Decomposition 5 BaO H O Ba OH Synthesis 6 3 Ca 2AICI 3CaCl 2A1 Single Displacement 7 4 NH3 6NO 5N 6H 0 Double Displacement Decomposition 8 4 H3PO3 H3PO4 PH3 10 FeS 10 2Fe O3 450 3 Fe O3 3C 3CO 2Fe Single Displacement Double Displacement Double Displacement 114NH3 502 4NO H O 124Si S8 Si S4 13 Hg CO3 Hg HgO CO Decomposition 14 Sic 2Cl SiCl4 C Single Displacement 15 Al4C3 12H 0 H 4Al OH 3 Double Displacement 16 V 0s HCI 2VOCI3 3H 0 Double Displacement Double Pisplacement 2Au 3H 5 Double Displacement 17 Ag2S 4KCN KAg CN K S 18 Au2S3 3H 192CIO H O HCIO HCIO3 Double Displacement Synthesis 20 4KO 1C0 2K CO3 302 21 MgNH4PO4 Mg2P 07 2 NH3 22 MnO 4HCI MnCl H O C1 Double Displacement 23 Pb 4Na 4C H5CI Pb C H5 4 NaCl 24 Ca OH 2 H3PO4 CaHPO4 2H O 25 Zn 2NaOH 2H O Na Zn OH 4 H 26 SrBr2 NH4 2CO3 SrCO3 2NH4Br 27 3Hg OH 2 2H3PO4 Hg3 PO4 2 4 0 282Ca3 PO4 2 SiO2 10C CaSiO3 P4 60 2941409 51206 312 30 0 C H3Cl 50 4CO 2H O 2HCl 12 NH4 2Cr O7 4NH3 2H O 2Cr O3 302 22AI 2NaOH 6H O 2NaAl OH 4 3H Double Displacement H O Decomposition

References What quantity of heat is required to raise the temperature of 63 6 g of gold from 20 C to 55 C The specific heat capacity of gold is 0 13 J g C Heat J

0 1 1 2 3 2 2 points What is the solvent in 100 sulfuric acid consisting of 82 g of SO3 g and 18 g of water Acid Water SO3

006 10 0 points Write and balance the equation for the reac tion between nitric acid and potassium iodide The products are potassium nitrate iodine nitrogen monoxide and water What is the coefficient of iodine in the balanced equation 2 None of these 5 10 6 7

For the reaction calculate how many moles of the product form when 0 026 mol of O completely reacts Assume that there is more than enough of the other reactant 2 Ca s O g 2 Cao s Express your answer using two significant figures

etermine the oxidation state of oxygen in the oxide ion Tap the arrows to set the value for the oxidation state oxygen

What compound was produced more of after ethyl alcohol reacted with the fire a O Oc e Alcohol Water Ethyl Booze All the Above None of the Above

In the Whoosh 1st Lab was the Ethyl Alcohol going through an Exothermic or Endothermic Reaction after it reacted with the fire O Exothermic O Endothermic

The hydrogen ion concentration of a basic solution is 9 60 x 10 12 M What is the pH of the solution

10 In a chemical rection an insufficient quantity of any of the reactants will limit the amount of product that forms The called the determines the amount of product that can be formed The reactant that is not completely used up in a reaction is

The Haber process generates ammonia from nitrogen and hydrogen gas through the following chemical equation N 3H 2NH3 Which is the excess reagent in the Haber reaction if equal moles of Hydrogen and Nitrogen are used

28 In the process of obtaining lead from PbS or galena the galena is roasted heated in the presence of oxygen so that the following reaction occurs 6pts 2PbS s 30 g 2PbO s 2SO g When 35 2 g of PbS reacts with 15 5 g of oxygen 30 0g of PbO is produced a Which of the substances is the limiting reactant must show all the calculations b What is the percent yield of PbO

electrolyte that completely dissociates when dissolved in water Determine the concentration of the two ions in an aqueous solution of 1 80 M potassium carbonate Tap on the options to select or deselect the ion concentrations Carbonate lon 0 60 M 0 90 M 1 80 M 3 60 M Potassium lon 0 60 M 0 90 M 1 80 M 3 60 M 5 40 M View Ion Sheet 5 40 M

Solubility g in 100g water 100 80 60 40 20 0 10 20 30 1 40 50 Temperature C 60 by In 600 g of water at 50 degrees Celsius approximately what mass of substance C will dissolve Answer of C 70 B A C 80 D

In order to make water for his potatoes Mark Watney slowly opens the nozzle to let out small quan of H and with a small sparks careful not to create a big enough flame to blow up the Hab he initia this reaction 2H O 2H O If Mark has 300 grams of H how many grams of H O can be produced

Use the balanced equation below to answer the questions that follow Ca 2 H 0 Ca OH 2 H 6 What volume of hydrogen gas will be produced if 14 7 g of calcium is placed in 11 5 g of wat

The ultimate goal from growing potatoes on Mars is to obtain glucose Cellular respiration releases stored energy in glucose molecules and converts it into a form of energy that can be used by cells Th chemical formula for glucose is C6H12O6 Write the empirical formula for glucose

Did Calcium Chloride or alternative and Water get Colder or Hotte O Hotter O Colder

Use the information to answer the following question A student is given the following information about an unknown solution Dissociates 100 Feels slippery to the touch pH 13 5 What is the possible classification of the unknown solution Weak Acid Strong Base Weak Base Strong Acid

Determine the approximate volume in mL of a 0 120 M solution that contains 10 0 g of copper II sulfate CuSO4 O83 mL O 790 mL O240 mL O 310 mL O 520 mL O Not enough information to answer 430 ml

10 How many grams of tin metal can be produced from the smelting heating of 4 5 kilograms of tin IV oxide

34 2 points Evaporation takes place if molecules of a liquid are in the interior of the liquid and have high kinetic energy are in the interior of the liquid and have high potential energy are at the surface of the liquid and have high kinetic energy are at the surface of the liquid and have high potential energy Previous

Write the full and shorthand electron configuration of iron

23 2 points A solution which contains the maximum amount of solute that should be possible to dissolve at a particular temperature is saic Osupersaturated unsaturated saturated

31 2 points A 3 minute egg would cook O slowest at the top of Mt Everest slowest in Stockton slowest in Death Valley elevation 282 ft in 3 minutes everywhere Previous

6 moles of benzene react with 33 75 moles of oxygen to produce carbon dioxide through the chemical reaction below 2C6H6 1502 12CO2 6H O What is the limiting reactant in this reaction a Benzene is the limiting reactant b Oxygen is the limiting reactant c Oxygen is the excess reactant d None of the above

16 2 points Will a balloon filled with NO sink or float in air float sink Previous

1 2 3 4 5 1 2 points Which of the following exhibits hydrogen bonding OH OH CO O H 02 OPH3

Methane combusts with oxygen through the following reaction CH4 202 CO2 2H O How many grams of carbon dioxide are produced when 16 0 g of methane and 48 0 g of oxygen gas combust Molar mass of CH4 16 0 g mol Molar mass of O2 32 0 g mol Molar mass of CO2 44 0 g mol g Your answer should be rounded to three significant figures Do not include units in your answer

Potassium chlorate decomposes upon slight heating in the presence of a catalyst according to the reaction below 2KCIO3 s 2KCl s 302 g In a certain experiment 60 0 g KCIO3 is heated until it completely decomposes What is the theoretical yield of oxygen gas Round answer to 3 significant figures do not include units Use the values below Known given mass of KCIO3 60 0 g molar mass KCIO3 122 55 g mol molar mass O2 32 00 g mol

Determine whether the two structures are isomers or the same molecule drawn in two different ways C CH 1 0 CH H C 8 O CH CH a Structures at the picture a are isomers O Structures at the picture a are the same molecules

17 2 points A molecule consisting of two different elements will be polar or nonpolar depending on the shape nonpolar polar

The primary energy level of an atomic orbital is associated with O The principal quantum number n O the angular momentum quantum number I the magnetic quantum number m the spin quantum number mg O the angular momentum and magnetic quantum numbers together

A solution is made using 180 0 mL of isopropanol density 0 7860 g mL and 275 0 mL of water density 1 000 g mL What is the molality isopropanol in water

Si 2Cl SICIA What mass of SiCl4 is formed when 10 0 grams of Si and 60 0 grams of Cl react Molar mass of SiCl4 169 8 g mol Molar mass of Cl 70 9 g mol Molar mass of Si 28 0 g mol g Your answer should be rounded to three significant figures Do not include units in your answer

11 f smaller larger upright inverted real virtual

How many grams of aluminum chloride are produced with 32 0 g Al react with an excess of HCI Al HCI H AICI3 unbalar 158 g AlCl3 138 g AlCl3 148 g AICI 3

Zn s PbCl aq ZnCl aq Pb s If 25 0 g of zinc metal are reacted with 30 0 g of lead II chloride zinc chloride and lead metal are form Which reactant will be in excess O lead II chloride lead metal zinc chloride zinc