Two samples of nitrogen dioxide are decomposed into their constituent elements. One sample produces 19.2 g of oxygen and 8.40 g of nitrogen, and the other sample produces 12.0 g of oxygen and 5.25 g of nitrogen. Which pair of ratios accurately demonstrates that the results are consistent with the law of definite proportions?

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.

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.