Answer:
Correct: B
Explanation:
The first block wont move because:
Σf=3-3=0N.
The second block will move because:
Σf:5-3=2N (direction to the right).
The third block will move because:
Σf=3N (direction to the right).
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Answer:
(a) Chlorine atom
(b) 0
(c) 109.5°
(d) about the same
Explanation:
Perchlorate is a negatively charged molecule that is composed of one carbon atom and four oxygen atoms. In this molecule, the <em>central chlorine atom</em> that is present in +7 oxidation state, is covalently bonded to four oxygen atoms.
Thus the number of <u>bond pairs is 4</u> and the number of <u>lone pairs on the central chlorine atom is 0</u>.
So according to the VSEPR theory, perchlorate ion has a <em>tetrahedral geometry</em>. Therefore, the<em> </em><u>ideal bond angle for the perchlorate ion is 109.5°</u>.
<u>The actual bond angle of perchlorate is about the same as ideal bond angle.</u> This is because the perchlorate is <em>resonance stabilized</em> and thus all the chlorine-oxygen bonds are equivalent.
answer: 6.875 moles
nCH4 = nCO2 = 110/(12 + 4) = 6.875
Atomic size - Francium 87
Electronegativity - Florine which is highest 4.0
Ionization energy - Helium,
so this all have the Highest size, so atom which is far from those have the smallest size, ionization energy and electronegativity.
Let me know if you have any question.