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Chemistry Final Sem1

QuestionAnswer
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
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.
How is a theory different from a law? BLANK
What is a physical property? A unique characteristic or quality
Name some physical properties. Oder, color, volume, state, density, melting and boiling points.
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.
What is a Heterogenous mixture? When over time the different parts will settle out, such as salad dressing or river water.
What is a Homogenous mixture? When the mixture is the same throughout, or it will not settle over time.
What is a mixture? Something that has variable compostion.
What is a compound? A compund has the same compostion everytime no matter where it is found.
What is an element? An element is when a substance cannot be broken down any further.
Identify each as a Element, compound, or mixture. 1)NaF, 2)iron, 3)air. 1)compound, 2)element, 3)mixture.
What is the common name for a homogenous mixture? A soultion.
Describe the distallaiton process. When you boil away a liquid to extract a solid out of it, (ex: salt water, crude oil, etc)
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.
What is the law of conservation of mass and energy. Mass and energy is neither created or destroyed.
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.
What is qualitative? It is the quality of a object.
What is quantitative? It is a measurment.
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.
What is acuracy? Acuracy is how close you are to the actual answer.
What is precesion? When the answer may not be correct, but all of the data is grouped close together.
How many sig figs are in these numbers? 1)102, 2).007, 3)100.0 1)3. 2)1. 3)4.
What is the metric unit for mass? Grams.
What is the metric unit for volume? Liters.
What is the metric unit for length? Meters.
What is the metric unit for heat? Celcius.
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.
What is the density of water? 1.000 g/cm3.
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.
An element with an equal number of protons and electrons is a what? BLANK
What is a metal? Any element left of the stairstep line.
What is a metalloid? The elements that touch the stairstep line.
What is a non metal? Anything to the right of the stairstep line.
What are the periodic table charges. Metals + Nonmetals-
What is Binary Ionic? An ionic compund that has only two elements.
What is Ternary Ionic? An ionic compund that has more that two elements present.
What is a Binary Acid? When an coumpund is an acid with only hydrogen and one other element present.
What is Ternary Acid? When a coumpund is an acid that has more than two elements present.
What is Molecular? When it is only the molecular formula.
One mole is equal to___________ of anything. 6.02 x 10^23 particles.
What are the diatomic elements? BLANK
Waht is the empirical formula? The simpilest way to right a compound.
What is the molecular formula? The compunds actual number ratio.
What are the different types of reactions? BLANK
When is energy absorbed? In an endothermic reaction.
When is energy realeased? In a exothermic reacton.
Created by: emmacard1