Arock falls off a cliff and hits the ground after three seconds. what is its velocity right before it hits the ground a. 0.31 m/s b. 3.3 m/s c. 9.8 m/s d. 29.4 m/s answer right !

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

Word equation for k+ h2o yield koh + h2

Ineed ! i have no clue how to do this problem.