8.15g of Ba(OH)2 are added to 16.9 g of water at 16.4°C in a calorimeter. What is the final temperature of the solution in degrees Celsius?

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

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.

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter