Draw a lewis structure for nhf2in which the central n atom obeys the octet rule, and answer the following questions based on your drawing.
the number of unshared pairs (lone pairs) on the central n atom is:
the central n atom forms single bonds.
the central n atom forms double bonds.

draw a lewis structure for co2in which the central c atom obeys the octet rule, and answer the following questions based on your drawing.
the number of unshared pairs (lone pairs) on the central c atom is:

the central c atom forms single bonds.

the central c atom forms double bonds.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

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