Suppose you held a lighted match to a solid hunk of wood and another match to a pile of wood shavings. Which form of wood will catch fire more easily?

Question

hunk of wood
pile of wood shavings

Answer 1

The pile of wood shavings will catch fire more easily than the solid hunk of wood. This is because wood shavings have a larger surface area relative to their volume, allowing them to ignite more quickly and burn more readily when exposed to a flame. Additionally, the smaller size of the shavings allows them to reach the ignition temperature faster than a larger solid piece of wood.

Answer 2

Alka-Seltzer is an effervescent (bubbling) antacid and pain reliever for the relief of heartburn and indigestion. Alka-Seltzer relieves indigestion by neutralizing excess hydrochloric acid (HCl) in our stomach. One of the active ingredients in Alka-Seltzer is sodium hydrogen carbonate (NaHCO3), which reacts with HCl and changes it into carbon dioxide gas (CO2) and water (H2O). The fizzing that is seen when an Alka-Seltzer tablet is dropped in acid is the same sort of fizzing reaction that can be seen when baking soda is mixed with vinegar. The chemical equation is shown below.

True or False: Sodium chloride, carbon dioxide, and water are all reactants.



True
False

Answer 3

False. In the reaction between sodium hydrogen carbonate (NaHCO₃) and hydrochloric acid (HCl), sodium chloride (NaCl), carbon dioxide (CO₂), and water (H₂O) are products, not reactants. The reactants are sodium hydrogen carbonate (NaHCO₃) and hydrochloric acid (HCl).