You measure a small block of gold (d=19.3g/cm3) to be 2.777 inches long, 2.434 inches wide, and 1.688 inches high. what is the mass of the gold block in kg? (2.54cm=1inch exactly)

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

What overall charge must all compounds have

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.