Answer:
Explanation:
Calcium chloride is a soluble salt which dissociates into calcium and chloride ions when dissolved in water.
CaCl₂(aq) ----> Ca²⁺(aq) + 2Cl⁻(aq)
Similarly, sodium oxalate when dissolved in water dissociates into sodium and oxalate ions.
Na₂CO₄(aq) ----> 2Na⁺(aq) + C₂O₄²⁻(aq)
However, in a double displacement reaction where the two solutions of the salts are mixed, the insoluble salt calcium oxalate is precipitated. The net ionic equation for the reaction is shown below:
Ca²⁺(aq) + C₂O₄²⁻(aq) ----> CaC₂O₄(s)
Mass-mass, volume-volume, mass-volume, and mole-mole
I cant really help you but here is a few articles that may help you.
http://www.icr.org/article/do-bacteria-evolve-resistance-antibiotics/
https://www.ncbi.nlm.nih.gov/books/NBK45713/
http://www.windows2universe.org/cool_stuff/tour_evolution_9.html
http://evolution.berkeley.edu/evolibrary/news/080401_mrsa
http://evolution.berkeley.edu/evolibrary/article/_0/evoscales_03
Ions are atoms or groups of atoms that have either gained or lost electrons