Answer:
They all have the same number of protons but different numbers of neutrons.
Explanation:
Elements will always have the same number of protons no matter the isotopes. Isotopes only change the number of neutrons. Silicon will always have 14 protons. So silicon-28 has 14 protons and 14 neutrons. Silicon-29 has 14 protons and 15 neutrons. Silicon-30 has 14 protons and 16 neutrons.
Answer: The compound in medicines should be non polar.
It is important for any drug to be able to dissolve itself through the cell membrane which consists of a lipid bi-layer, in order to diffuse in the body and circulate biologically, performing its function.
Non polar compounds are lipid soluble and therefore can dissolve in the lipid layers.
Polar compounds are water soluble and fail to cross the cell membrane.
Therefore scientists need to be sure of using compounds that are non polar in nature so they pass through the cell membrane and enter into the blood circulation of the body and perform its due function.
Explanation:
Answer:
978mmHg
Explanation:
The total pressure of a gas mixture is defined as the sum of the pressure of each gas in the mixture.
If the mixture of gases you have 200mmHg for O₂, 350mmHg for N₂ and 428mmHg for He, total pressure of the mixture is:
200mmHg + 350mmHg + 428mmHg = <em>978mmHg</em>
