Answer:
22:
Formular:
![atomic \: mass = \frac{ \sum(isotopic \: mass \times \%abundance)}{100} \\](https://tex.z-dn.net/?f=atomic%20%5C%3A%20mass%20%3D%20%20%5Cfrac%7B%20%5Csum%28isotopic%20%5C%3A%20mass%20%5Ctimes%20%5C%25abundance%29%7D%7B100%7D%20%20%5C%5C%20)
substitute:
![atomic \: mass = \frac{(23.985 \times 78.70) + (24.986 \times 10.13) + (25.983 \times 11.17)}{100} \\ \\ = \frac{(1887.620) + (253.108) + (290.230)}{100} \\ \\ = \frac{2430.958}{100} \\ \\ { \boxed{ \boxed{average \: atomic \: mass = 24.3 \: amu}}}](https://tex.z-dn.net/?f=atomic%20%5C%3A%20mass%20%3D%20%20%5Cfrac%7B%2823.985%20%5Ctimes%2078.70%29%20%2B%20%2824.986%20%5Ctimes%2010.13%29%20%2B%20%2825.983%20%5Ctimes%2011.17%29%7D%7B100%7D%20%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%5Cfrac%7B%281887.620%29%20%2B%20%28253.108%29%20%2B%20%28290.230%29%7D%7B100%7D%20%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%5Cfrac%7B2430.958%7D%7B100%7D%20%20%5C%5C%20%20%5C%5C%20%7B%20%5Cboxed%7B%20%5Cboxed%7Baverage%20%5C%3A%20atomic%20%5C%3A%20mass%20%3D%2024.3%20%5C%3A%20amu%7D%7D%7D)
23:
<em>Same</em><em> </em><em>element</em><em> </em><em>is</em><em> </em><em>represented</em><em> </em><em>by</em><em> </em><em>same</em><em> </em><em>number</em><em> </em><em>of</em><em> </em><em>protons</em><em>.</em><em> </em>
Answer:
6 protons. 6 protons
7 neutrons. 8 neutrons
6 electrons. 6 electrons
Note: <u>Atoms</u><u> </u><u>with</u><u> </u><u>same</u><u> </u><u>proton</u><u> </u><u>number</u><u> </u><u>but</u><u> </u><u>different</u><u> </u><u>mass</u><u> </u><u>number</u><u> </u><u>are</u><u> </u><u>called</u><u> </u><u>isotopes</u>
The answer is
C. A single replacement reaction (acid reactions)
An example would be the reaction between simple metal Potassium (K) and Water (H2O), resulting in a much solid compound called Potassium Hydroxide (KOH) and hydrogen gas is set free.
K+H2O --> KOH
Because some people don't care if your a man or a woman they'll still try to harm you which is wrong cause i don't see why people have to kill each other but they do its out of bad habit and its also what they choose in life some people choose to be murders and some choose to go to work and have a family instead of being in jail for the rest of your life unless your sentenced to death. But some people don't understand a lot of things but i do well some but i do know this that when people kill someone they may feel bad but sometimes they don't they feel happy and wanna do it again so they run and try not to get caught. but life isn't fair but lets hope that the world will come around again if it ever does but its always gonna be on the news that someone is murdered.
Answer:
The relative conjugate acids and bases are listed below:
CH3NH2 → CH3NH3+
H2SO3→ HSO3-
NH3→ NH4+
Explanation:
In a Brønsted-Lowry acid-base reaction, a conjugate acid is the species resulting from a base accepting a proton; likewise, a conjugate base is the species formed after an acid has donated a hydrogen atom (proton).
To this end:
- HSO3- is the conjugate acid of H2SO3 i.e sulfuric acid has lost a proton (H+)
- NH4+ is the conjugate acid of NH3 i.e the base ammonia has gained a proton (H+)
- OH- is the conjugate base of H20
- CH3NH3+ is the conjugate base of the base CH3NH2 methylamine