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sci fi
ch 12, 13,15, 16,
| Question | Answer |
|---|---|
| Which statement best describes a compound? | A compound is a material that is made up of a combination of atoms bonded together |
| How many atoms of oxygen are in H3OClO4? | 5 |
| How many elements are in the compound C6H12O6? | 3 |
| Oxygen atoms are used to make water molecules, does that mean that water, H2O and oxygen O2 have similar properties? | No they are not, compounds are uniquely different from the elements from which they are made. |
| If you eat metallic sodium or inhale cholrine gas, you stand a strong chance of dying. Let these two elements react with eachother however, & you can sprinkle the compound on your popcorn for a better taste. Whats going on? | Sodium chloride has nothing in common with sodium and cholrine. |
| Which of the following boxes represents a compound | Has two different types of atoms |
| Is the following transformation representative of a physical or chemical change | A chemical change |
| The boil point of methanol is 65C. The boiling point for ethonol is 78C. Which of the following statements is true? | At 70C, you will have methanol gas and liquid ethanol |
| Water and ethanol can be separated by heating the ethanol away until it boils from the water? What type of change is this? | Physical change |
| Which of the following would not be concidered a chemical property | The temperature at which a liquid will boil |
| Which of the following was an example of a physical change | Water boiling and being converted into steam |
| Which of the following is an example of chemical change | Gasoline being used in the engine of a car as exhaust |
| The following image descibes what type of change | Chemical change |
| The following image describes what type of change | Physical change |
| Which of the following will not be considered matter | Light |
| Which of the following statements about electrons is true | All the above |
| What is the valence shell | The outermost shell |
| Oxygen 8, Sulfer 16, Selenium 64, have similar because? | The outermost shell contains the same number of electrons |
| What do the electron configurations for all the group 18 elements have in common | outermost shells are filled to capacity |
| How many electrons are there in the third shell of sodium | 1 |
| Which of the following elements are in the same period as magnesium | chlorine |
| Which of the following elements are in the same group as silicon? | carbon |
| Elements that are in the same group have a tendency to have very similar chemical properties | |
| Which element will have chemical properties the most similar to chlorine | bromine |
| Which of the following elements is a gas at room temperature | argon |
| Which of the following elements is a halogen | chlorine |
| Which of the following elements is in the 4th period | chromium |
| Helium is a nonmetallic gas and the second element in the periodic table, rather than being placed adjacent to hydrogen because | helium is most similar to their group 18 elements |
| The nucleus of an electrically neutral iron atom contains 25 protons, how many electrons? | 26 |
| What is the appproximate mass of carbon atom in amu | a carbon atom has a mass of 12 amu, CO2 has 44 amu |
| When we breathe we inhale oxygen, CO2 and water vapor. Does breathing cause you to lose or gain weight? | lose weight |
| Which of the following best describes an element | a material consisting of only one type of atom |
| Since atoms are mostly empty space why dont objects pass through one another | the electrons on atoms repel other electrons when they get close |
| Does it make sense to say that the textbook is about 99.9% empty space? | yes |
| Which are older, the atoms in the body of an elderly person or a baby? | the same age |
| Which has the shortest wavelength? | x-ray |
| A wave with a long wavelength has a relatively | low frequency |
| Both sound and light can travel | in water |
| Which of the following is fundamentally different from the others? | sound waves |
| Electromagnetic waves consist of | vibrating, electric, and magnetic fields |
| Which of these have the longest wavelength? | radio waves |
| The source of electromagnetic waves is vibrating | electrical charges |
| Which of these has a higher frequency than visible light? | ultraviolet |
| For light a red shape indicates the loud light sources move? | away from you |
| A doppler effect occurs when a source of sound | moves toward you |
| The source of all wave motion is a | vibrating object |
| Evaporation is a cooling process | The more energetic molecules are able to escape the liquid |
| The higher the frequency of a wave, the | shorter the wavelength |
| When a volume of air is compressed, the temperature | increases |
| The process of convection occurs in | fluids |
| Entropy is most closely related to the | 2nd law of thermodynamics |
| As a system becomes more disorder, entropy | increases |
| As entopy in a system increases, energy within the system becomes | less order |
| Which law of thermodynamics addresses the direction of heat flow | 2nd law |
| Which law of thermodynamics states that no system can reach absolute zero? | 3rd law |
| Which law of thermodynamics is the restatement of the conseervation of energy that applies to thermal systems? | 1st law |
| The lowest temperature possible in nature is | -273 C |
| When you touch a piece of ice with your finger energy flows | from your finger to the ice |
| The temperature of melting ice is | -32 F and 0 C |
| Whether one object is warmer than another object has to do with | molecular kinetic energy |
| The force that accelerates a rocket into outer space is exerted on the rocket by | exhaust gases |
| Earth pulls on the moon. Similarly, the moon pulls on earth, evidence that? | Earth and Moon comprise an action-reaction pair (both) |
| The resistive force of friction occurs for | all of the above |
| An object in motion tends to remain in motion | without a need of force |
| The average speed of a deer traveling a distance of 2km in a half hour is | 4km/h |
| The two measurements neccessary for calculating average speed are | distance and time |
| Which of the following solutions is the most dilute | 1L of water with 1g of sugar |
| Which of the following statements describes a saturated solution | all of the above |
| Which of the following describes the term concentration | it is the amount of solute in a given amount of soulution |
| In a solution of 77% nitrogen and 23% oxygen which is the solvent | nitrogen |
| In a solution made from 1 tsp of sugar and 1L of water, what is the solvent | sugar is solute, water is solvent |
| Is the air in your house a homogeneous or heterogenous mixture | heterogenous |
| How would you classify the following materials_MILK | suspension |
| If you filter sea water to remove all of the particles you would be left with | homogeneous mixture called a solution |
| Which of the following would be considered a homogeneous mixture | wine |
| How would you claddify the following materials_SWIMMING POOL | homogeneous mixture |
| Which of the following is a pure substance | baking soda |
| Which of the following would be considered a heterogeneous mixture | salad dressing |
| What is the difference between a compound and a mixture | the components of a mixture are not chemically bonded together |
| A combination in two or more substances in which they no longer contain their chemical properties is called | compound |
Created by:
E.Ochoa
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