Identify whether each chemical will dissolve in water or not. (That is, determine whether they are soluble or insoluble.) NaBr: (soluble / insoluble)
LiOH: (soluble / insoluble)
Al2S3: (soluble / insoluble)
BaOH: (soluble / insoluble)
H2SO4: (soluble / insoluble)
MgCl2: (soluble / insoluble)

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together