Whaich property of a mineral detemines whether it can scratch a piece of calcite? A. Reactivity
B. Streak
C. Hardness
D. Luster

Why does the united states constitution require that a national census be taken every ten years?

Why was george washington being elected unanimously important? it indicated how much respect and popularity he had gained. it paved the way for other unanimous elections. it meant that he would be president forever. it meant that he voted for himself.

Drugs have a high potential for abuse. there is no routine therapeutic use for these drugs and they are not available for regular use. they may be obtained for “investigational use only” by applying to the u.s. drug enforcement agency. examples include heroin and lsd. which scheduled drug is this?