If an electrostatically charged balloon is brought near other objects, which of the following will occur?
select all that apply.

it will be attracted to objects with the same charge.
it will be attracted to objects of the opposite charge.
it will be attracted to objects with a neutral charge.
it will be repelled by objects with the opposite charge

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

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?