Answer:
Atomic mass of nitrogen = 14.0067 amu.
Explanation:
Isotopes can be defined as two or more forms of a chemical element that are made up of equal numbers of protons and electrons but different numbers of neutrons.
Generally, the isotopes of a chemical element have the same chemical properties because of their atomic number but different physical properties due to their atomic weight (mass number).
The two isotopes of nitrogen are nitrogen-14 and nitrogen-15.
Given the following data;
Relative abundance of N-14 = 99.63%
Atomic mass of N-14 = 14.003
Relative abundance of N-15 = 0.37%
Atomic mass of N-15 = 15.000
The atomic mass is;
14.003 × (99.63/100) + 15.000 × (0.37/100)
Atomic mass = 14.003 × (0.9963) + 15.000 × (0.0037)
Atomic mass = 13.9512 + 0.0555
Atomic mass = 14.0067 amu.
<em>Therefore, the atomic mass of nitrogen is 14.0067 amu. </em>
Answer:
Which scientist developed the first model of the atom that showed the structure of the inside of an atom
Ernest Rutherford
Answer:
It depends.
Explanation:
Generally, the presence of more landmasses in the Northern Hemisphere produces continental climates with extreme temperatures that are relatively rare in the Southern Hemisphere due to the abundance of oceans at the southern latitudes north of Antarctica.
If a city has average rainfall and warm temperatures in the Northern Hemisphere, it is logical to assume that, on average, a city at the same distance from the equator in the Southern Hemisphere would have slightly cooler temperatures and more rainfall due to the enhanced maritime effect.
This depends, of course, entirely on the local geography of the city in question, and the results could be completely different based on the actual city given.
Answer:
Magnesium (Mg)
Explanation:
The elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.
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Answer:
Option d = terpenes
Explanation:
Terpenes:
It is unsaturated hydrocarbons extracted from the plants specially from pine and citrus. These are cyclic compound with the formula C₁₀H₁₆.
1. It is used as a solvent for natural products.
2. It is used in food , cosmetics and pharmaceutical industries.
3. It is very effective ingredients for agricultural pesticides.
4. It is used as a fragrance in perfumes.
5. As a flavoring agent it is also added into the beverages products.
6. It is highly concentrated and used in very small amount to create fragrances.
7. Its high concentration can led to the bad flavor and fragrances.
