5.1 Cells Are Organized into Tissues

the type of matter that is uniform throughout and cannot be separated into other substances by physical means is called: a - a compound b - either an element or a compound c - an element d - a homogeneous mixture e - a heterogeneous mixture

b - either an element or a compound

You are given a sample of a uniform red solid that melts at a definite, sharp melting point to give you a red liquid. You continue to heat the red liquid. A violet cloud rises from the liquid leaving behind a yellow liquid. Further tests of the violet gas and yellow liquid show that these substances cannot be decomposed chemically into simpler substances. What can be determined about the original red solid? a - the red solid is an element b - the red solid is a compound c - the red solid is a heterogeneous mixture d - the red solid is a homogeneous mixture e - the red solid can be described by either a or b

b - the red solid is a compound

which of the following statements is false? a - strawberry jam with seeds is a heterogeneous mixture b - water is a pure substance and a compound c - aluminum is a pure substance and an element d - room air is a pure substance and a homogeneous mixture e - none of them are

c - room air is a pure substance and a homogeneous mixture

which of the following is incorrect: a - 47,535.602 rounded to three sig figs is 4.75x10^4 b - .001340 has four sig figs c - 63 hats cannot be rounded because it's an exact number d - .0285001 rounded to two sig figs is 2.8x10^-2 e - all of the statements are correct

d - .0285001 rounded to 2 sig figs is 2.8x10^-2 (should be 2.9!!)

which of the following is the coldest? a - the freezing point of water b - the temperature when rain turns to snow c - 5 degrees C d - 30 degrees F e - all are equally cold

d - 30 degrees F