How many grams of calcium carbonate, CaCO3, contain 48 grams of oxygen atoms? A) 41
B) 50
C) 62
D) 88
E) 100

This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

Based on its chemical properties, identify the position of each chemical family on the periodic table.