Final Exam Study Questions CHEM 1311 Fall 2023_

question 8

Höhörs Chemistry- 4th Hour - Dr. Paul / Gases/Lesson 148 What does the kinetic molecular theory tell us about the temperature of a substance? O The temperature of a substance does not affect the motion of the particles. OA substance with a lower temperature has particles that move faster. O A substance with a higher temperature has particles that move slower. O A substance with a higher temperature has particles that move faster.

1. Metal Ore a. element b.compound c. mixture   2.  Grinding dried leaves into a fine powder a.chemical change b. physical change

Provide a short description of multiplicity and give an example of how it relates to someone life. 150 words minimum

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------------------------------------------------------------------------------------------------------------------------ A solution of lactic acid, HC3H5O3, on a laboratory shelf was of undetermined concentration. If the pH of the solution was found to be (2.51x10^0), what was the concentration of the lactic acid? The Ka of lacticacid is 1.4x10-4. Express your answer to three significant figures.

7. What is a pure substance that is only made of type of atom? A. Element C. Compound D. Elixir B. Suspension What is a molecule that is made of atoms of two or more elements chemically 8. bonded together? A. Heterogeneous B. Heteronuclear C. Homogeneous D. Homonuclear 9. Which best describes heterogeneous mixtures? A. They must always be made of liquid components. No gas or solid components. B. The components must always be mixed or dispersed uniformly within the same physical state. C. The components are always visible and distinguishable from the other components. D. All of the options are correct. 10 Which best describes a homogenous mixture? A. They must always be made of liquid components. No gas or solid components. B. The components must always be mixed or dispersed uniformly within the same physical state. C. The components are always visible and distinguishable from the other components. D. All of the options are correct. 11 Which method would be the most effect to separate…

Energy Use the lerms in the word bank to complete the graphic organizer below. Word Bank potential energy joules Energy transformed stored kinetic energy motion chemical 1. measured in 2. different types 3. Energy of these two types can be energy that is energy of 5. Examples of this type include elastic gravitational

Gas chromatography is an analytical technique that is used to separate and analyze samples that can be vaporized without decomposing. The chromatography column contains a substance that helps separate the sample being analyzed. The sample is vaporized and carried through the column by an inert gas. As the mixture moves through the column, the compounds are separated based on how much they interact with the substance in the column. The molecules of each compound are detected as they exit the column, and a peak for each compound is produced on a chromatogram. The area under each peak on the chromatogram is proportional to the concentration of the compound in the sample. A chromatogram produced by separating a mixture of compounds is shown. Time to Go Through Column Based on the information given, which of the following statements about the chromatogram is most likely true? A The three peaks each represent a different element. B The three peaks each represent a different substance used to…

What does salinity mean? O A. A measurement of the amount of floating particles in fresh water. O B. A measurement of disolved solids in ocean water, mostly salt but also many types of minerals too. OC. A measurement of dissolved solids in fresh water, mostly salt but also many types of minerals too. O D. A measurement of the amount of floating particles in fresh water. DELL F3 F5

A scientist from which field of chemistry investigates a new form of packaging material that breaks down rapidly in the environment?A. biochemistryB. theoretical chemistryC. environmental chemistryD. inorganic chemistryE. physical chemistry

Was the Law of Conservation of mass followed? Explain.

Jumbled Word Correct Term Definition ALGANUR MUTMENMO UMQATUN SNBREUM LATOBRI GAAIMRD NOTRECLE MEGATINCU MQATUN SNBREUM NEREGY EVELL RHEPES ROGUND EATTS CNMAAPRAGEIT NEETCLOR FONIUCOIARNTG 3.

Q12. Silicon dioxide, which is composed of the elements silicon and oxygen, contains 46.7 percent silicon by mass. How much oxygen will 10 g of silicon combine with?

12. What is an element? A compound?

Question 1 What is the difference between temperature and heat?     a. Temperature is the total kinetic energy of a system, and heat is the energy that transfers from one object to another due to a difference in temperature.   b.Heat is the total kinetic energy of a system, and temperature is the energy that transfers from one object to another due to a difference in heat.   c.Temperature is the average kinetic energy of the particles in a system, and heat is the energy that transfers from one object to another due to a difference in temperature.   d.Heat is the average kinetic energy of the particles in a system, and temperature is the energy that transfers from one object to another due to a difference in heat. Heat is the average kinetic energy of the particles in a system, and temperature is the energy that transfers from one object to another due to a difference in heat.

Which hypothesis describes the behavior of molecules when a substance changes from a gas to a liquid? The average speed of the molecules increases, because they have lower energy in the liquid state. The average speed of the molecules decreases, because they have lower energy in the liquid state. The average speed of the molecules decreases, because they have higher energy in the liquid state. The average speed of the molecules increases, because they have higher energy in the liquid state.

these are 2 different questions please label as 3 and 4