Why does an air bubble rise to the surface of a glass of water

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal