A double bond in chemistry is a chemical bond between two chemical elements involving four bonding electrons<span> instead of the usual two. The most common double bond, that is between two </span>carbon atoms<span>, can be found in </span>alkenes<span>. Many types of double bonds exist between two different elements.</span>
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did anyone able to look up this question
Answer: mass and relative abundance of each isotope of that element
Explanation:-
For example:
If an element X has two isotopes with following masses ad abundance:
Mass of isotope 1 = 267.8 amu
% abundance of isotope 1 = 87.8% = 0.878
Mass of isotope 2 = 269.9 amu
% abundance of isotope 2 = 12.2% = 0.122
Formula used for average atomic mass of an element :
![\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})](https://tex.z-dn.net/?f=%5Ctext%7B%20Average%20atomic%20mass%20of%20an%20element%7D%3D%5Csum%28%5Ctext%7Batomic%20mass%20of%20an%20isotopes%7D%5Ctimes%20%7B%7B%5Ctext%20%7B%20fractional%20abundance%7D%7D%29)
![\text{ Average atomic mass of an element X}=\sum[(267.8\times 0.878)+(269.9\times 0.122)]](https://tex.z-dn.net/?f=%5Ctext%7B%20Average%20atomic%20mass%20of%20an%20element%20X%7D%3D%5Csum%5B%28267.8%5Ctimes%200.878%29%2B%28269.9%5Ctimes%200.122%29%5D)
![\text{ Average atomic mass of an element X}=268.06amu](https://tex.z-dn.net/?f=%5Ctext%7B%20Average%20atomic%20mass%20of%20an%20element%20X%7D%3D268.06amu)
The force you apply to pull the box is weak.
Explanation:
- We know that, F=ma, where F is the force, m is the mass of the object and a is the acceleration with which the object moves.
- Hence, as per the equation given above the applying force should be either equal to or greater than the mass of the object.
- If it is not the case, then the object will not move. So, for the object to move we need to apply a greater force, when the applied force is greater then the object moves faster and vice versa