Exam Under: Flash Cards A theory is best described as generalization that explains a body of known facts or phenomena The liter is defined as 1000cm^3 the standard base unit for mass is kilogram symbol that represents volume mL A change in force of gravity on an object will affect weight What statement is true about mass mass of an object is determined by comparing it to an object of known mass Density is calculated dividing mass by volume What is true about density density is a physical property measurement that closely agrees with an accepted value accurate numerical result is said to have good precision if repeated values agree closely if values for x and y vary as an inverse proportion their product is a constant the graph of 2 variables that are directly proportional to one another is a straight line .25g equals 250mg 1.06L of water equals 1060mL The number of grams equal to .5kg is 500 A chemist obtained values 5.2246g 5.2353g and 5.2501g for the mass sample. without knowin the true mass these value have poor precision Which of these measurements has been expressed in sig fig? 30.00mm When 5.7m is divided by 2s the quotient is correctly reported as 3m/s How would .00930m be expressed in scientific notation 9.30×10^-3m An analytical balanc can measur mass to the nearest .0001g. In scientific notation the accuracy of the balance would be expressed as 1×10^-4 Related posts: AP Chem Ions AP Chem Strong Oxidizers AP Chem Vocab Ch. 1 CP Intro to Chem Element Cards CSCC CHEM 171 D.A.V.I.S.