1. Tributary
2. Erosion
3. Where a river turns
Answer:
14.02 x 10²⁴ molecules
Explanation:
To solve this problem we will use <em>Avogadro's number</em>: It relates to the number of molecules (or atoms) contained in 1 mol of any given substance:
- 14.02 x 10²⁴ molecules ÷ 6.023 x 10²³ molecules/mol = 23.28 moles
Thus, 23.28 moles of water contain 14.02 x 10²⁴ molecules.
Explanation :
Extraction : It is a separation technique in which one compound is separated from a mixture of compounds.
In a chemical process, the solution may not contain only the desired product but there maybe a mixture of products present.
So, for obtaining the desired product we need to get rid of the other products in a mixture like catalyst (if used), other by products or unreacted starting material.
For a compound to be extracted it has to be soluble in the extracting solvent.
Therefore, this process is based on the miscibility of solute and solvent in a mixture.
The answer is c, because we use it as an "index" to tell when the animal lived, so if it's unique to that time level in the ground we know it lived that long ago.
The chemical formula for the product is RbBr.
