Inorganic Chemistry Questions

A 51 1g chunk of lead at 78 4 C is dropped into 225g of water at 12 9 C At what temperature will they reach equilibrium

Describe the difference between a polymer and a copolymer A A polymer consists of two or more different monomers when a copolymer is made up of one type of monomer B When a polymer is formed the monomers bond to each other without the loss of atoms When a copolymer is formed the monomers lose an atom or group of atoms When a polymer is formed the monomers lose an atom or group of atoms When a copolymer is formed the monomers bond to each other without the loss of Catoms A polymer is made up of one type of monomer when a copolymer has two different monomers D o o D OA B

135 kJ of energy is applied to a 20 0 kg iron bar at 19 8 C What temperature in C will it heat to

Calculate the K for lactic acid HC3H5Os if in a 1 0000 M solution there is 0 9884 M HC H Os left at equilibrium HC H5O3 H O H 0 C H O 55 5 M start equilibrium A 7 35 x 103 B 1 17 x 102 C 1 36 x 104 10 8 1 0000 M 0 9884 M 55 5 M 0 0 0116 M 0 0 0116 M

le The density of aluminum 15 3 2 70 g cm what is mass of a piece of aluminum w volume of 1 50 cm 4 20 4 05 0 556 an

Use the Re How many significant figures are there in each of the following numbers 930 00 5 2771000 0 8

to acc ess important values if How many protons neutrons and electrons are there in a neutral atom of the isotope of gallium named gallium 65 protons neutrons electrons

For each bond show the direction of polarity by selecting the correct partial ch 8 Si s CI S Cl Si 8 O O The most polar bond is blome Varian ante remaining

cess w many significant figures are there in each of the following numbers 710 6300 00 4100 0 7580 0

How many moles of Mn are there in 107 grams of Mn moles

11 Molarity of solution that is made up 30 0g of sodium chloride dissolved in water to make 500 0mL of solution 2 35M 0 742M 1 03M

Consider the balanced chemical equation 4Cr s 302 g 2Cr2O3 s a What mole ratio would you use to calculate how many moles of oxygen gas would be needed to react completely with a given number of moles of chromium metal 2 mol O 3 mol Cr 4 mol O 3 mol Cr 3 mol O 2 mol Cr 3 mol O 4 mol Cr b What mole ratio would you use to calculate the number of moles of product that would be expected if a given number of moles of chromium metal reacts completely 3 mol Cr 03 2 mol Cr 4 mol Cr O3 2 mol Cr 2 mol Cr O3 4 mol Cr 2 mol Cr 03 3 mol Cr

Answer the following questions Show your calculations clearly where applicable 1 Arrange the following substances in order of increasing boiling point bp 4 pts a CH3CH OH b SO2 c CH OH highest bp Lowest bp

What term is used by chemists to quantitatively describe a solution in which a relatively small amount of solute is dissolved O dilute O saturated O supersaturated O concentrated O unsaturated

Generally the higher degree of unsaturation of a fatty acid the lower the melting point Explain why this is the case

Calculate the AH of the reaction 2 H g O g 2 H O 1 Bond Energy Bond Energy kJ mol kJ mol 436 163 414 418 389 946 464 222 368 565 431 364 297 347 611 837 305 615 891 360 736 Bond H H H C H N H O H S H F H CI H Br H I C C C C C C C N C N C N C O C O C O C CI 799 in CO 1072 339 Bond N N N N N N N O N O N F N CI N Br N I 0 0 0 0 0 F O CI 0 1 F F CI F CI CI 590 272 200 243 159 142 498 190 203 234 159 253 243 Bond Br F Br Cl Br Br I CI 1 Br 1 1 Si H Si Si Si C S O Si O S O Si Cl S S S F S CI S Br S S Bond Energy kJ mol 237 218 193 208 175 151 323 226 301 265 368 523 464 418 327 253 218 266

IF you mutiply 3 84 cm x 2 179cm whats the answer to the corred number of Significant digits and units 8 43cm 8 43 cm 8 4 cm

A dime is found to have a mass of 2 13 grams Set up the problem below and calculate the mass of the dime in kilograms 2 13 g x Drag and drop your selection from the following list to complete the answer 1 kg kg 1000 kg

In the illustration The product that forms is The number of product molecules formed is The limiting reagent is The illustration to the left represents a mixture of carbon black and oxygen red reacting to form a product The number of atoms molecules in excess is

Name the type of crystalline solid formed by SiO2 O molecular solid atomic solid O ionic solid O amorphous solid O none of these

A gas occupies 25 7 L at 2 00 atm pressure and 27 C How many moles of gas are present in the sample O 23 2 mol O 1 04 mol O 2 09 mol O 3 59 mol O 4 49 mol

Is the change represented by the following illustration best categorized as a chemical change or a physical chang In the illustration H is color coded as white and O is color coded as red C 8 8

If a scientist reacts 138 53g of magnesium metal with 35 62g of oxygen gas and 13 96g of magnesium oxide is recovered in the lab what is the percent yield for the reaction You will be asked to upload your work for this question

Use the Refere any significant figures are there in each of the followi 0 00 00 0 100 90 0

will take more energy to melt a gram of ice than to melt a gram of solid iodine O True O False Question 17 Which of the following has the lowest vapor pressure O H O NaCl O NH3 respectively It 1 pts

5 When grease and soap are mixed an emulsion forms Draw a picture to illustrate this Soap forms scum insoluble salts in hard water Which

12 What is the configuration of double bonds cis or trans in most naturally occurring lipids

In an acidic solution H OH In a basic solution OH H O In a neutral solution H OH O None of the above statements a c are correct O All of the above statements a c are correct Question 30 A 102 7 g sample of nitric acid solution that is 70 0 HNO3 by mass contains O 71 9 mol HNO3 O 1 14 mol HNO3 O 1 63 mol HNO3 4 53 x 103 mol HNO3

O H SO4 SO O HNO3 NO O HC2H302 C H O O H PO HPO OHBr Br Question 26 True or false The conjugate acid of a weak base is a strong acid True

How much heat in J is required to bring 4 25 grams of silver from 0 C to 235 C

What is the pH of a 2 1 M solution of HNO3 O 0 32 O 0 32 O 14 32 O 13 68 O none of these

The total mass of a solution is 178 7 g The solvent mass is 125 2 g What is the mass percent of the solute O 70 1 O 40 9 O 29 9 O 20 1 O Not enough information is given

2 What is the conjugate acid of the following acids 4pts i HPO4

4 Both of the following reactions are saponifications Does that mean that the product in each case is soap Explain CH CH C OCH3 NaOH OCH O CH CH 16 C OCH NaOH CH CH C ONa CH OH ONa C ONa CH CH 6C ONa CH OH

8 Lipids are responsible for several features of biological membranes Explain how a high concentration of unsaturated hydrocarbon chains makes the membrane more fluid Explain why the presence of cholesterol decreases the

A specified quantity of an unknown gas has the volume of 19 4 mL at 22 C and 659 torr Calculate the volume at STP O 1 25 mL O 18 2 mL O 15 6 mL O 20 7 mL O none of these

What mass of solute is contained in 50 0 mL of a 1 51 M potassium chloride solution O 33 1 g O 2 47 g O 75 5 g O 5 63 g O 49 4 g

hat is the formula for magnesium fluoride hat is the formula for aluminum sulfide hat is the formula for potassium iodide

Lipids are a diverse group of molecules of biologic origin that dissolve in nonpolar solvents Since these molecules are not grouped together on the basis of their structures it is difficult to remember the structures and functions of lipids As a group make a map that will help you remember the different classes of lipids

5 Draw a diagram illustrating the difference between a micelle a lipid bilayer vesicle and a cell membrane

7 Discuss the fluid mosaic model of membranes Explain why the percentages of protein lipid and carbohydrate vary depending upon the type of membrane

Using trends in lattice energy rank these from most negative lattice energy 1st to least negative lattice energy 4th KBr CaCl2 AICI3 TiO2 Choose Choose Choose 1st 2nd 1th

21 Matal catalysts must have slow adsorption and de sorption of reactant and product True False

Which of these is held constant for coffee cup calorimetry O Internal energy of the sample O Pressure O Volume Temperature

What market structure best describes McDonald s origins

Which of these is held constant for bomb calorimetry O Internal energy of the sample O Pressure O Volume O Temperature

What does the term amphipathic mean Design some molecules that would act like soap but will not form insoluble salts in hard water

a Assuming both fatty acids contain the same number of carbon atoms which would be more dense an unsaturated or saturated b Briefly explain how the presence of a double bond affects molecular packing and the

If heat flows into a system during a chemical reaction the reaction is considered Select heat will be a Select number If heat flows out of a system during a chemical reaction the reaction is considered Select and the heat will be a Select Select and the positive number

The reaction of propane C3H8 burning has a AH 2 044 kJ mol How much propane in grams must be burned to heat a 4 45kg cast iron pan from 23 0 C to 225 C Cast iron has a specific heat capacity of 0 460 J g C