29. If the chemical equation for a single replacement reaction is: 2A + BX → A2X+B
What type of particle is A?
A An ionic compound.
b. a covalent molecule.
C non-metal element.
d. a metal element.

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

What forms when chemical reactions combine pollution with sunlight?

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean