Is pulverizing an aspirin a physical or chemical process

A train travels 97 kilometers in 2 hours, and then 96 kilometers in 2 hours. What is its average speed?

For a given substance, what links moles to moles?

One in which the reactants are in different phases is called

Which best describes the direction of heat? 1) from a substance with no thermal energy to a substance with high amounts of thermal energy 2) from a substance with less thermal energy to a substance with more thermal energy 3) from a cooler substance

There are seven types of crystals. Which of these is not one of the seven? a. triclinic b. tetraclinic c. tetragonal d. orthorhombic

Restate Newtons first law in terms of acceleration

Why is burning is not a recommended method of disposing plastics

Why do cells have a plasma membrane? A. to separate protein from the nucleus B. to distinguish plants from animals C. to define the size of the cell D. to separate the inside of the cell from its enviroment

Base on its molecular mass, what is the molar mass of iron

For the following reaction in aqueous solution, identify all those species that will be spectator ions. Select all that apply. Na, SO4+Hg (NO3) 2HSO4+2NaNO3 Choose one or more: A. Hg2S04 B. Na2S04 C. Nat D. NO3 E. SO42- F. Hg2 (NO3) 2 G. NaNO3 H.