This is for chemical reactions project, will give to whoever actually answers this Please please please help me

In two or more complete sentences, design an extension of this experiment to determine the mass of the carbon dioxide gas that was produced. Include a hypothesis regarding the mass of the gas in grams. Write your answer essay box below.

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

What is the standard unit of measure for acceleration?