Answer:
there are 3 significant figures
Explanation:
do not count the first 2 zeros. only the nimbers after the zero
Answer:
An atom of Bromine (Br) forms an ion and becomes Br⁻
Explanation:
- Atoms of elements gain or lose electron(s) to attain a stable configuration and form ions.
- When an atom gains electron(s) it forms a negatively charged ion called an anion.
- For example, Bromine is a halogen and its atom requires to gain one electron to attain stability and form a bromine ion (Br⁻).
- When an atom loses electron(s) it forms a positively charged ion called a cation.
- For instance, atoms of calcium(Ca) requires to lose two electrons to attain stability and form calcium ion (Ca²⁺).
Answer:
Ca2+ is an ion with a correct charge.
Variables within an experiment many be altered in order to produce specific outcomes such as a reaction rate. The reaction rate is a measure of how fast a chemical reaction can happen. The increase in temperature increases the collision of molecules, such as the solid sugar solute and and the water molecules, which act as a solvent. Agitation, such as stirring, also increases the solubility by increasing collisions.
This continues until the solution becomes too saturated.
