A student fills up a graduated cylinder to 5.0 mL with ethylene glycol. The graduated cylinder empty had a mass of 36.2 g, but now has a mass of 42.2 g. Find the density of the ethylene glycol.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

Complete each row of the table below by filling in the missing prefix or missing exponent.

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.