CHEM 231 Midterm 1 Test with Questions and Answers

CHEM 231 Midterm 1 Test with Questions and Answers states of matter ANSWER gas, liquid, solid, plasma physical change ANSWER nothing changes at atomic level chemical change ANSWER changes at the atomic level (making and breaking bonds) homogenous mixture ANSWER sugar and water- you can't see both things heterogeneous mixture ANSWER wet sand-you can see both but you cannot seperate extensive property ANSWER depends on amount ex. volume, mass intensive property ANSWER does not depend on amount ex. density temperature ANSWER measures how fast molecules move F=1.8C+32 ANSWER Fahrenheit to Celsius conversion law of definite proportions ANSWER all samples of a given compound have a fixed ratio of elements by mass Law of multiple proportions ANSWER when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.