Answer:
Conducting an experiment
Explanation:
This is because you must test your hypothesis by doing an experiment on the hypothesis
Answer:
Go on the site named " the chemistry of ice cream ''
Explanation:
https://davidson.weizmann.ac.il/en/online/sciencepanorama/chemistry-ice-cream
An element is a single molecule. the answer is C: Oxygen.
Answer:
reversible
Explanation:
The freezing of mercury is reversible because solid mercury can be melted.
Answer:
One nucleophilic center
Explanation;
Nucleophile:
Nucleophile is a substance which is nucleus loving in nature (<em>Nucleo</em>; Nucleus , <em>phile</em>; Loving). It is known as a specie which donates a lone pair of electrons to electrophile (electron loving) in a chemical reaction.
Thus, Nucleophile is the region of higher electron density in a molecule and attacks on the lower electron density region of another molecule. Also, the nucleophile can also contain a negative charge.
Number of Nucleophilic centers in Methanol:
The chemical structure of Methanol is attached below and it can be observed that the oxygen atom is containing two lone pair of electrons. Hence, the oxygen atom can act as a nucleophilic center. Therefore, there is only one nucleophilic center in methanol.
H₃C-OH + H₃C-Br → H₃C-O-CH₃ + HBr
In above reaction methanol is acting as a nucleophile and is attacking on electrophilic center (Carbon) of methyl bromide yielding dimethyl ether.
