1) List the reactants: sodium bicarbonate (NaHCO₃) and citric acid (H₃C₆H₅O₇).
Reactants undergo change during a chemical reaction.
2) List the products: water (H₂O), carbon dioxide (CO₂) and sodium citrate (Na₃C₆H₅O₇).
Products are the substances formed from chemical reactions.
3) The balanced chemical equation:
3NaHCO₃ + H₃C₆H₅O₇ → 3H₂O + 3CO₂ + Na₃C₆H₅O₇.
The atomic mass on the periodic table represents the sum of number of protons and number of neutrons.
Atomic mass = Number of protons + number of neutrons
Hope this helps!
Answer:
4. Frost wedging
Step-by-step explanation:
Water expands about 9 % as it freezes.
Thus, water in cracks forces them apart when it freezes.
When the ice thaws and freezes again, the crack is forced further apart.
The rock may eventually split into pieces.
The repeated freeze-thaw cycle is called freeze wedging.
1. is <em>wrong</em>. Oxidation is the chemical reaction of a substance with oxygen
. The splitting of a rock is a physical change.
2. is <em>wrong.</em> A landslide is the movement of ground down a slope.
3. is <em>wrong</em>. An alluvial fan is a triangle-shaped mass of sediment that a river deposits when its flow is suddenly slowed.
