Sodium Tetraborate, a naturally occurring mineral, is crushed into Borax. This is an example of a change. * Chemical Change

Synthetic Change

Physical Change

Please Help I will mark brainllest for the first answer. If you dont know the answer do not answer please.

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

How does a hydroelectric power plant converts energy into energy.

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium