<h3>Answer:</h3>
10 Atoms
<h3>Explanation:</h3>
The structure of said compound is sketched according to guide lines provided in statement and is attached below.
Hydrogen Bond Interactions:
Hydrogen Bond Interactions are those interactions which are formed between a partial positive hydrogen atom bonded directly to most electronegative atom (i.e. F, O and N) of one molecule and the partial negative most electronegative atom of another molecule.
In given structure we are having seven most electronegative oxygen atoms (labelled red) and three partial positive hydrogen atoms (labelled blue) directly attached to most electronegative atom (i.e. oxygen atoms).
Therefore, the oxygen atoms will make hydrogen bonds with water's hydrogen atoms and the partial positive hydrogen atoms will make hydrogen bonds with water's oxygen atoms respectively.
Due to electronegativity difference between H and F atom.
<h3>
What is the reason for the difference ?</h3>
- The bond length of HF is 92 pm. It is 16% shorter than the sum of the covalent radii of H (37 pm) and F (72 pm).
- The shorter of the bond length is due to the difference in electronegativity between H and F atom. The electronegativity of F is 4.0, whereas the electronegativity of H is 2.1.
- Greater the difference of electronegativity between the bonded atoms, shorter will be the bond length.
- As becomes smaller i.e. as we proceed from HF to HI, this effect becomes lessens and bond length will be more predictable.
Thus from the above conclusion we can say the difference in electronegativity between H and F atom this is the reason for shorter bond length of HF.
Learn more about bond length here :
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<span>The major part of a multicellular fungus is a twisted mass of hyphae that have grown together called a mycelium</span>
Answer:
C
Explanation:
because then you'd be able to make a group to raid, run with you, and save more people.
Answer : The age of the mineral is, 
Explanation :
First we have to calculate the rate constant, we use the formula :



Now we have to calculate the time.
Expression for rate law for first order kinetics is given by:

where,
k = rate constant
t = time passed by the sample = ?
a = initial amount of the reactant = 61.0 mg
a - x = amount left after decay process = 15.5 mg
Now put all the given values in above equation, we get


Therefore, the age of the mineral is, 