What is the mass of an object that is accelerating at 15 m/s when a force of 2000N is exerted

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

What 3 categories are elements divided

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o