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Chem 209

______ is a science that deals with materials and the changes of these materials. chemistry
A _____ made with any instrument requires an estimate. measurement
A _____ always has some degree of uncertainty. measurement
A measurement always consists of two parts: _____ & _____. a number & a unit
How many significant figures are in the number 6,407,000? 4
^15N and^15O are_____ isotopes
_____ can undergo chanWe often formulate general obseved behavior into a statement called a _____. natural law
_____ can undergo changes in both its physical and its chemical properties. matter
two cubes of the same size but different masses will have different _____ densities
A _____ ______ is used to convert the moles of starting substances to the moles of desired substance. mole ratio
any number can be expressed as a number between _____ and _____ and a power of 10 ( either positive or negative) . 1 and 10
_____ has mass and occupies space. matter
_____ reaction will always have water and carbon dioxide as products combustion
Mass Percent (%) [ mass of solute (part) divided by mass of solution (whole) ] x 100
Created by: FO