Write a chemical equation for the chemical reaction in which calcium

carbonate (CaCO3) produces calcium oxide (Cao) and carbon dioxide

(CO2).

NaCl + H2SO4 - --> Na2SO4 + HCl Balance the double replacement chemical reaction.

Explain the 'redox' process in your own words.

The d-block elements are known as

What gas do we need to breathe in?

Which one of Steno's principles allows for the determination of the relative age of different rock layers in the Grand Canyon?

A student states that non-metal atoms share their core electrons when they form covalent bonds. What is wrong with this statement? A. Atoms do not share electrons during covalent bonding. B.

Boron has an average mass of 10.81. One isotope of boron has a mass of 10.012938 and a relative abundance of 19.80 percent. The other isotope has a relative abundance of 80.20 percent. What is the mass of the two isotopes?

What type of radiation is most likely to damage DNA? A. ionizing B. non-ionizing

Water vapor cools and comes together to form a cloud. This is an example of what change in state? condensation evaporation melting

Which group of the periodic table does this element most likely belong to