5. carry out the following operations and express the answer with the correct number of significant
figures. (10 + 67.809) × 20 =
a: 1560
b. 1500
c.2000
d.1600

How will the emission of an alpha particle affect the atomic number of an atom

When balancing a chemical equation:

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange