Which equation obeys the law of conservation of mass?
2c4h10 + 2cl2 + 12o2 7co2 + ccl4 + 10h2o
c4h10+ cl2 + 2o2 7co2 + ccl4 + 8h2o
2c4h10+ 2cl2 + 12o2 4co2 + ccl4 + h2o
2c4h10+ 2cl2 + 6o2 co2 + ccl4 + 6h2o
4c4h10+ 4cl2 + 14o2 14co2 + ccl4 + 20h2o

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.

Which of the following is not true about the atomic model of substances?

Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?