General Questions and Answers

A 10 gram potato chip is ignited and transfers its energy to 50 0 grams of water The temperature of the water rises from 10 C to 52 C How much energy per gram J g does the potato chip have Show your work below and provide an answer at the end WITH UNITS If you would like to complete it on a sheet of paper and upload it you may do so

w all work Always use units mple Problem How many grams of product can be made from 9 5 grams of aluminum reacting h excess oxygen gas 17 949 A1 03 tep 1 Write reaction and balance 4 Al 3 0 2 Al O3 Step 2 Unit conversion Convert given in grams to moles 1 mole molar mass of given Step 3 Use mole ratio to convert moles of given to moles of wanted unknown Step 4 Unit conversion Convert moles of wanted to grams molar mass of wanted 1 mol Answer Joens 10 1 20 Practice lamco lose of babaon sir imun How many grams of water are required to react completely with 165 gram

Determine the empirical formula for the compound with the molecular formula C 0Hg empirical formula Determine the empirical formula for the compound with the molecular formula N B H 2 empirical formula

This problem may take one step or up to four 1 g 100 og 1 kg 1 000 g 1 lb 454 g 1 lb 16 oz 1 m 100 cm 1 m 1 000 mm 1 ft 12 in 1 L 1 000 mL 1 yd 3 ft 1 L 100 CL 4 qts 1 gallon 1 qt 946 mL 60 s 1 min 60 min 1 hr 180 ft day is how many cm hr Do this work on paper 1 g 1 000 mg 1 km 1 000 m 1 in 2 54 cm 1 KL 1 000 L 1 L 10 dL 1 mol 1 000 mmol 24 hr 1 day cm hr

4 Acetic acid HC H3O has an ionization constant of 1 7x105 What is the K for C H O na 1 7x10 5 1 1 10 14 5 88235 4477 1 7x10 5 1 7x10 5 5 88x10 10 9 00less 5 What is the pH of a 0 16 M solution of acetic acid Pha log 0 00168 2 7726275577 2 77 6 A 0 25 M solution of an unknown acid has a pH of 2 5 What is the Ka of the acid 7 Ammonia is a weak base with Kb 1 8x105 What is the pH of a 0 5 M solution of NH3 8 A 0 045 M solution of a certain unknown base has a pH of 9 7 What is the K for this base

Calculate the H O for the given pH values below Use the antilog or log function on your calculator 5 11 0 6 4 1 tomato 7 0 32

Use the formula to answer the following question 4Li Pb SO4 2 2Li SO4 Pb How many moles of Pb SO4 2 are needed to produce 330 g Li SO4 O A 1 00 mol OB 1 50 mol O C 110 mol OD 598 mol

7 The diagram below represents the same field of mice hunted by a hawk over a period of three months Month 1 Month 2 Month 3 The overall changes in the population of mice can be explained best by a natural selection b succession c reproduction d mouse extinction

What is the volume of 3 20 moles of gas at standard temperature and pressure STP O A 0 143 L O B 39 0 L O C 71 7 L O D 0 263 L

An engineer turns the temperature of a gas down holding the volume constant at 1 250 L Initially the temperature of the gas was 672 C and had a pressure of 257 kPa Determine the pressure of the gas when the temperature decreased to 216 C

if you read the Fahrenheit 451 book accept my question

Use the information to answer the following question In the lab a student reacts hydrogen gas and oxygen gas to form water according to the balanced equation 2H O 2H O After the reaction is complete there is leftover hydrogen gas What is the limiting reactant O A Oxygen is the limiting reactant because there is leftover hydrogen OB Hydrogen is the limiting reactant because the coefficient of hydrogen is 2 in the balanced equation O C Oxygen is the limiting reactant because the coefficient of oxygen is 1 in the balanced equation O D Hydrogen is the limiting reactant because there is leftover hydrogen

3Na P Na3P The sodium runs out before the phosphorus when 60 0 grams of solid sodium is heated with 50 0 grams of solid phosphorus How many grams of phosphorus remain after the reaction is complete g P remaining

Select the statement that was part of Dalton s atomic theory 1 In the atom negatively charged electrons are suspended in a sphere of positive charge 2 Matter consists of tiny indivisible particles called atoms 3 Each atom of a particular element has the same mass but atoms of different elements have different masses 4 Atoms combine in small whole number ratios to form molecules O 5 Atoms of some pairs of elements can combine with each other in different whole number ratios to form different compounds

Use the information to answer the following question Ethane C H6 undergoes combustion in the presence of oxygen O according to the balanced equation 2C H6 70 4CO 6H O If Helen wants to form 1 2 moles of CO how many moles of oxygen O must be used OA 0 69 moles OB 92 moles O C 67 moles OD 2 1 moles

What is the relative number of oxygens atoms for every chromium atom in the following compound Cr NO3 6 1 10 atom for every 1 Cr atom 2 3 0 atom for every 1 Cr atom 3 6 0 atom for every 1 Cr atom 4 18 O atom for every 1 Cr atom 5 36 O atom for every 1 Cr atom

What is the volume of a 0 125 M NICI solution that contains 3 25 g NICI O A 0 00313 L OB 0 201 L OC 26 0 L O D 3 370 L

Gravity decreases as you get farther from the surface of the earth Which of the following also decreases when you get farther from the earth O Mass O Weight ONeither weight nor mass O Both weight and mass

Which of these will increase as a result of stronger intermolecular forces O Viscosity Boiling point O Vapor pressure O Capillary action Surface tension O Volatility Melting point

Match the terms below to the labels on this phase diagram Pressure A B D E E D 3 Temperature Choose Gas Vapor pressure Sublimation curve Triple point Fusion curve Viscosity Liquid Critical point Solid Vaporization curve Choose Choose Choose

Rank the intermolecular forces from 1st strongest to 4th weakest Dispersion forces Dipole dipole interactions Hydrogen bonding lon dipole forces Choose Choose Choose 1st strongest 3rd 4th weakest

Which one of the following is an extensive property 1 Viscosity 2 Volume 3 Melting point 4 Ductility

Convert the density of 0 916 g mL to density in lb qt Use the following conversion factors to help guide your answer 1 lb 454 g 1 L 1 064 qt 1 0 00215 lb qt 2 390 85 lb qt 3 1 89 lb qt 4 2 15 lb qt 5 2 02 lb qt

In doing research for your Geology class you learn about different factors that affect arsenic concentrations in ground water First you learn that As is only soluble in water in the inorganic forms arsenic acid H3ASO4 and arsenous acid H3ASO3 1 6 pts Draw the Lewis structure for each acid 2 3 pts Explain why arsenic acid is more soluble in water than arsenous acid at neutral pH 3 3 pts Explain why the Southwestern part of the U S which experiences very dry arid climates tends to have higher concentrations of As in groundwater Arsenous acid is formed in water from the dissolution of diarsenic trioxide The crystal structure of diarsenic trioxide can be described as a cubic crystal system 4 7 pts In this description roughly spherical As406 cages think of these cages as their own unit adopt a face centered arrangement in a cubic unit cell If the density of diarsenic trioxide is 3 7 g mL what is the length of one edge of the unit cell in 5 2 pts What is the radius of one of the roughly spherical As406 cages 6 4 pts Assuming the crystal spacing is the same as the edge length it s not quite but we ll assume it anyway at what angle would you measure the first order diffraction line for diarsenic trioxide with a Cu Ka radiation that has a wavelength of 1 54059

What mass in g of butanol C4H10O is required such that its combustion produces 59 4 g o products The combustion of a compound containing C H and O is its reaction with molecular oxygen O to produce water and carbon dioxide

Determine this value and discuss it 12 1 0 0 8 0 6 0 4 0 2 0 0 the solvation shell from alanine Report 2 4 6 8 181 10 2 12 sim 14

gnet Test object pper coil Testing for attraction between the test object and the magnet Was there a pull on the test object Testing for repulsion between the test object and the magnet Was there a push on the test object

5 Foreclosures require a O a three day Pay or Vacate Notice O b five day Notice to Vacate c five day Pay or Vacate Notice d three day Notice to Vacate

7 Your client hopes to purchase a foreclosed property What should you encourage your client to do before the sale occurs a file a court case against the current occupants b hire a sheriff to remove current occupants c get a title search d write up a promissory note

4 What happens to a property during the fourth stage of a nonjudicial foreclosure a The borrower is given a 90 day window to correct the situation b A notice of default is filed c The property is auctioned d The sale of the property is posted online and in newspapers

3 Which of the following requires a judicial foreclosure process a deed of trust b mortgage instrument c judicial instrument d mortgage of trust

32 The nuclear process that takes place in an atomic bomb or in a nuclear reactor in a mul controlled fashion is illustrated in the highly simplified diagram shown below In reality the splitting of U235 into the same parts each time is not realistic A Beta particle B C D U 235 The barium and krypton formed in the nuclear reaction above are each radioactive since they are too neutron rich so each atom undergoes nuclear decay that changes a neutron into a proton within the nucleus Based on the information what type of particle will be emitted from the nuclei of barium and krypton Gamma ray particle Alpha particle Positron particle Ba 141 Kr 92 n 11

CaCO3 s CaO s CO2 g The standard enthalpy of reaction for each substance is shown below A 12 7 kg 2 25 kg 110 kg 1 97 kg the following reaction occurs B Substance CaCO3 s CaO s CO2 g What must the mass of the skillet be C D Which statement correctly classifies the decomposition of calcium carbonate reaction A The reaction is endothermic because energy is released during the reaction B The reaction is endothermic because energy is absorbed during the reaction C The reaction is exothermic because energy is released during the reaction D The reaction is exothermic because energy is absorbed during the reaction AH kJ mol 18 A cast iron skillet is used to fry bacon For optimal frying the pan must be heated to about 178 C from a room temperature of 22 0 C It is known that 1 58 x 105 Joules of heat energy are absorbed by the pan to reach the desired temperature and the specific heat of iron is 0 450 J g C 1206 9 635 1 393 5

6 A researcher is conducting a titration experiment where they mix hydrochloric acid with barium hydroxide HCI aq Which of the following reactions shows a correctly balanced chemical equation for the titration being performed A 2 HCI aq Ba OH 2 aq BaH2 aq 2 CIOH aq C Ba OH 2 aq B 2 HCI aq Ba OH 2 aq BaCl2 aq 2 H O 1 HCI Ba OH 2 aq BaCl aq H2 02 1 aq BaO H3CIO aq D HCI Ba OH 2 aq aq s

13 A sample of fruit juice is found to have a hydrogen ion concentration of 2 87 x 10 4 What would the pH be A 2 87 B 3 54 C 4 58 D 8 16 14 When nitroglycerin C3H5ON 309 is detonated the carbon and hydrogen atoms bonded to oxygen and nitrogen separate and heat is released What type of energy is stored in the bonds A Chemical potential energy Thermal potential energy C Chemical kinetic energy D Thermal kinetic energy B

5 An acid is a substance that forms hydrogen ions when dissolved in water This is an example of A B an Arrhenius definition a Br nsted Lowry definition C an operational definition D a chemical change definition

7 A student researched some of the properties of H CO3 pH Taste Litmus paper H A Acid B Base C Salt D Polyatomic ion Properties of H CO3 3 4 Sour Turns litmus paper red Proton donor Based on the properties described what type of chemical is H CO3

1 For chocolate milk what is the solute 2 Which of the following are electrolytes Pure water 3 If pewter is made of 85 tin and 15 copper What is the solute 5 Circle ALL of the following substances are electrolytes Dissociated ionic salts KCI Dissolved covalent compounds Pure water H O Salt water what is the solvent salt water bath water What is the solvent 4 The air you breathe is primarily made up of nitrogen 78 09 and oxygen 20 95 The remaining 1 is made up of argon 0 93 carbon dioxide 0 039 What are the solutes What is the solvent POA Ca3N Gatorade ocean water

6 What is interest O a the amount that someone pays for an object O b the price that someone pays for the temporary use of someone else s money c the estimated cost of something d the desire to learn something

17 If the Federal Reserve finds deficiencies with a bank the bank must first a pay a fine b pay a penalty c immediately suspend operations d outline corrective measures taken

19 The Federal Reserve will evaluate a bank using the CAMELS rating system What does the acronym CAMELS stand for a commercials assets management errors liquidity solutions b care assets management estoppel liquidity solutions c capital assets management earnings liquidity sensitivity d customers assets management earnest liquidity savings

Which of the following are examples of solutions Check ALL THAT APPLY Air Pure Water H20 Milk Sterling Silver Allow contains silver and nickel Sugar Water Chocolate Chip Cookie Coffee

11 A sample of butane C4H10 gas having a volume of 2 0 L at 25 C and 1 3 atm was mixed with a sample of oxygen gas having a volume of 8 0 L at 31 C and 1 5 atm The mixture was reacted to form carbon dioxide gas and water 2 pts Write a balanced equation for the reaction 10 pts How many grams of water were produced

At 1 0 atm carbon dioxide cannot be in the liquid phase as shown in this phase diagram Roughly sketch or describe what the heating curve for CO might look like at 1 0 atm You can also submit your drawing sketch via Canvas message after you complete the quiz Pressure atm 73 0 5 11 1 0 Solid 78 5 56 4 Liquid Gas Temperature C 31 1

25 What is a feature of fusion reactions but not fission reactions A Raw materials are easily available B Produces radioactive particles C A nucleus transforms into two lighter nuclei D Involves a chain reaction 26 When an atom of Cs 137 undergoes radioactive decay it emits a beta particle What ator results from this decay A B Cs 136 Ba 137 C I 133

Specific Heat of Some Metals Gold 3 Lead C Copper Aluminum Metal Aluminum Iron Copper Silver Lead Gold Specific Heat Capacity J g K 0 900 0 444 0 385 0 240 0 160 tudent wants to identify a 4 78 g unknown metal sample She applies 3 00 joules of heat the sample and measures a temperature change from 24 94 C to 28 86 C 0 129 ased on the information and the table above what is the most likely identity of the metal

A chemist made a 30 rubbing alcohol solution by mixing 30 grams rubbing alcohol with 70 grams of water Which substance is the solvent rubbing alcohol water

List all the intermolecular forces available for methylamine CH3NH and indicate the predominant intermolecular force H H C N H H H

Identify the secondary source of information from the following options Indexing and abstracting periodicals Subject periodicals and encyclopedias Textbooks and research monographs

It s a solute 9 8 pts A container with a volume of 750 mL is filled with 7 5 g of fluorine gas at a pressure 450 m Hg The temperature of the gas is C