If 81g of water is measured out, how many moles are in the sample? * A. 4
B. 5
C. 2.5
D. 4.5

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.