Answer: There are fossils found on either side of different continents and the continents look as though some are puzzle pieces that fit together.
D. It is a chemical change because solubility in water of Solid A is different than the solubility in water or both Potassium Iodide and Silver Nitrate
Explanation:
From the given table which summarizes findings about the experiment, we can conclude that It is a chemical change because solubility in water of Solid A is different than the solubility in water of both Potassium Iodide and Silver Nitrate.
- A chemical change is a form of change in which new substances are produced.
- A physical change is one in which the states of matter changes especially the form.
Now we that two soluble substances goes to insoluble product.
- A substance is soluble when they go into solution with a solvent of the same type.
- This change from solubility to insolubility of a compound is a typical chemical change.
- Other forms of changes are just physical changes.
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Answer: 2.35 (no unit given)
Explanation:
The H₂O is the formula of the chemical specie while the (s), (l) and (g) tell us the state in which it is present, where s is solid, l is liquid and g is gas.
Answer:
Ca(OH)2 --> Ca2+ + 2OH-
Explanation:
Calcium hydroxide is sparingly soluble in water. It dissociates to give the following:
The net ionic equation :
Ca(OH)2 + H2O --> Ca2+ + 2OH- + H2O
Since, H2O doesn't affect the overall reaction, therefore;
Ca(OH)2 --> Ca2+ + 2OH
