What is to provide a standard, systematic approach to assist with reproducability of results?
100
The ability or inability of a substance to change into another substance.
What is a chemical property?
100
The number of significant digits in 789.500
What is six?
100
The physical blend of two or more substances
What is a mixture?
100
Chemistry is
What is the study of matter and its changes?
200
The first step in the scientific method
What is observe a problem or form a question?
200
A property that depends on the amount of substance present
What is an extensive property?
200
The equation for percent error
What is [(actual value - measured value)/actual value] x 100?
200
A mixture where the components are not uniform
What is a heterogeneous mixture?
200
The difference between an element and compound
What is an element cannot be broken down into smaller substances?
300
The steps in the scientific method
What are problem, hypothesis, experiment, data analysis, conclusion, communication?
300
Two examples of extensive properties
What are mass, volume, length?
300
The product of 78.56 and 5.56
What is 437?
300
A homogeneous mixture is also known as this
What is a solution?
300
Two examples of qualitative data
What are color, texture, smell?
400
The difference between a scientific theory and a law
What is a scientific theory summarizes a hypothesis or group of hypotheses that have been supported with repeated testing and a law generalizes a body of observations and no exceptions have been found to a law.
400
Three examples of intensive properties include
What are density, color, luster, smell, hardness?
400
A solid with a mass of 58.1 g and a volume of 78.4 mL sinks or floats in water?
What is floats because the density is less than 1 g/mL?
400
When light is scattered by colloidal particles
What is the Tyndall Effect?
400
Density is calculated from a line graph by determining this
What is the slope?
500
The difference between an independent and dependent variable
What is an independent variable is manipulated by the experimenter and the dependent variable responds?
500
An example of a physical property and chemical property of baking soda.
What are white, powdery (physical) and reacts with vinegar, water (chemical)?
500
The mass of 55.0 mL of a liquid with a density of 0.255 g/mL.
What is 14.0 g?
500
Three examples of a colloid inlcude
What are fog, blood, milk, smoke, gelatin?
500
The difference between accurate and precise
What is accuracy is how close measurements are to the true value and precision is how close the measurements are to each other?