Explanation:
Can you please make the question more precise..
Thanks..
Answer:
-4
Explanation:
15 protons and 19 electrons can be thought of as:
15+(-19), which is -4
Chemical ecology is the study of chemicals involved in the interactions of living organisms. It focuses on the production of and response to signally molecules and toxins.
Basically any animal group that doesnt have any backbones. for example fish birds different types of mammals and reptiles.
hope this helps!
Answer:
8.468 x 10^24.
Explanation:
We know from Avogadro’s Law that 1 mol of a gas contains 6.022 x 10^23 molecules.
So, 7.031 mol contains 7.031 x 6.022 x 10^23 = 4.234 x 10^24 molecules. Since oxygen is diatomic, the number of oxygen atoms is 8.468 x 10^24.
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