Igneous that can be changed by heat and pressure which can change the form of the rock
Answer:
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.
Explanation:
<span>V equals one-third times pi times r squared times h</span>
A Lewis acid is a substance that can <span>accept a pair of electrons.
</span>A Lewis acid<span> is a substance that contains an empty </span>orbital<span> which can accept an </span>electron pair<span> from a Lewis </span><span>base.
For example b</span>oron trifluoride (BF₃) is trigonal planar molecule and can bind with Lewis base ammonia (NH₃). Other examples are metal cations, <span>acidic compounds hydr</span><span>onium ions.</span>