Answer:
A)16.3% (Hexane's formula is C6H14)
Answer is: <span>be odorless, colorless and tasteless.
</span><span>Food poisoning bacteria cannot be smelled, tasted or seen on food, except with microscope.
</span>Food poisoning symptoms include nausea, vomiting and diarrhea. Some exaples of food poisining bacterias are: Salmonella, E. coli, <span>Campylobacter.</span>
Answer:
Chemical Change: A chemical change is a reaction that transforms (changes) a substance into a new substance or substances with different properties.
Physical Change: No new substances are made. It is fairly easy to reverse this kind of change. An example would be dissolving salt in water. The change can be reversed simply by evaporating the water.
How does a physical change differ from a chemical change?
A physical change is different than a chemical change, because in a physical change, the composition of the matter did not change. While in a chemical change, the composition of the matter did change.:
<span>Answer: D. They all have the same number of electrons in the electron cloud</span>
Protons are subatomic particles, their electric charge is positive, and they are located in the nucleus of the atom.