8) Another new element, Presitigium, has two isotopes. 67.52% of the Prestigium isotopes have a mass of 256 amu. The rest of the sample is Prestigium-257. Find the average atomic mass of Prestigium.

Arecipe calls for 1.2 cups of oil. how many liters of oil is this?

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.