Chemistry Final Sem1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What are the steps in the scientific method? | 1.State the Problem, 2. Observe, 3. Creat Hypothesis, 4. Experiment, 5. Collect Data, 6. Analyze, 7. Conclusion
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| How is a hypothesis differnt form a theory? | a hypothesis is only one statement that coinsides with only one experiment, where as a theroy is a group of hypothesis that prove the theroy.
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| How is a theory different from a law? | BLANK
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| What is a physical property? | A unique characteristic or quality
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| Name some physical properties. | Oder, color, volume, state, density, melting and boiling points.
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| What is the difference between a chemical and physical change? | Physical changes do not chane the composition of a substance, where as a chemical change will.
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| What is a Heterogenous mixture? | When over time the different parts will settle out, such as salad dressing or river water.
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| What is a Homogenous mixture? | When the mixture is the same throughout, or it will not settle over time.
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| What is a mixture? | Something that has variable compostion.
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| What is a compound? | A compund has the same compostion everytime no matter where it is found.
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| What is an element? | An element is when a substance cannot be broken down any further.
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| Identify each as a Element, compound, or mixture. 1)NaF, 2)iron, 3)air. | 1)compound, 2)element, 3)mixture.
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| What is the common name for a homogenous mixture? | A soultion.
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| Describe the distallaiton process. | When you boil away a liquid to extract a solid out of it, (ex: salt water, crude oil, etc)
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| Identify each as either a chemical change or physical change, 1)burning coal. 2)melting ice. 3)iron rusting. 4)cutting grass. | 1)chemical. 2)physical. 3)chemical. 4)physical.
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| What is the law of conservation of mass and energy. | Mass and energy is neither created or destroyed.
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| What is the difference between observation and inference? | an observation can be seen and recorded, Where as an infernce is based off of things that we don't see happen.
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| What is qualitative? | It is the quality of a object.
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| What is quantitative? | It is a measurment.
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| State weather is it qualitative of quantitative, 1) blue color. 2) 10 degrees. 3)very cold. 4)12 grams. | 1)qualitative. 2)quantitative. 3)qualitative. 4)quantitative.
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| What is acuracy? | Acuracy is how close you are to the actual answer.
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| What is precesion? | When the answer may not be correct, but all of the data is grouped close together.
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| How many sig figs are in these numbers? 1)102, 2).007, 3)100.0 | 1)3. 2)1. 3)4.
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| What is the metric unit for mass? | Grams.
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| What is the metric unit for volume? | Liters.
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| What is the metric unit for length? | Meters.
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| What is the metric unit for heat? | Celcius.
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| What is the difference between weight and mass? | An objects weight can vary by the amount given, whereas an objects mass will always be the same.
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| What is the density of water? | 1.000 g/cm3.
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| How do you predict if an object will sink or float? | If the objects density is higher that water then is will float, if it is lower than water it will sink.
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| An element with an equal number of protons and electrons is a what? | BLANK
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| What is a metal? | Any element left of the stairstep line.
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| What is a metalloid? | The elements that touch the stairstep line.
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| What is a non metal? | Anything to the right of the stairstep line.
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| What are the periodic table charges. | Metals + Nonmetals-
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| What is Binary Ionic? | An ionic compund that has only two elements.
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| What is Ternary Ionic? | An ionic compund that has more that two elements present.
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| What is a Binary Acid? | When an coumpund is an acid with only hydrogen and one other element present.
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| What is Ternary Acid? | When a coumpund is an acid that has more than two elements present.
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| What is Molecular? | When it is only the molecular formula.
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| One mole is equal to___________ of anything. | 6.02 x 10^23 particles.
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| What are the diatomic elements? | BLANK
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| Waht is the empirical formula? | The simpilest way to right a compound.
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| What is the molecular formula? | The compunds actual number ratio.
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| What are the different types of reactions? | BLANK
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| When is energy absorbed? | In an endothermic reaction.
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| When is energy realeased? | In a exothermic reacton.
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