Which corresponds to a pressure of 1.23 atm? 8.73 mmhg 9.23 mmhg 125 mmhg 935 mmhg

 The value  which  corresponds to  pressure  of 1.23  atm    is 935  mm hg

 calculation

convert  1.23 atm  to  mmhg

that is   1 atm = 760   mm hg

            1.23 atm =?    mm hg

 by cross  multiplication

={( 1.23 atm  x 760  mm hg) / 1 atm} =935 mm hg

chemistry sucks a**

explanation:

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