Answer:
Fossils are essentially clues that have been left behind by various forms of living things. They are instrumental tools for understanding the diverse groups of organisms that have inhabited our planet at one time or another. A fossil is any preserved evidence of an organism.
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Explanation:
Answer:

Explanation:
Hello!
In this case, for the described chemical reaction, we find it is:

Because it says that the iron is dissolved in a strong acid which provides addition hydrogen ions to the reaction media. Thus, for the questions attached on the figure we find:
- This a REDOX reaction because we see iron is being oxidized from 2+ to 3+ and manganese reduced from +7 to +2.
- Since it is a redox reaction and the oxidized species is that undergoing an oxidation number increase, we evidence iron goes from +2 to +3, which means iron is the oxidized species.
- In this case, for the used 59.2 mL (0.0592 L) of the 0.2000 M solution of potassium permanganate, we can compute the consumed grams of iron via stoichiometry including the 5:1 mole ratio between them in the chemical reaction:

It means that the percent of iron in that sample is:

Best regards.
Answer:
# The simpliest is: H-H
# All gases formed by elements of the 7th group in the periodic table:
F-F, Cl-Cl, Br-Br, I-I
# In general, Covalent bonds formed between atoms of the same kind are usually non-polar.
Explanation:
Hope this answer will help you.
The photos for the reaction arent here so ill insert them below