The following list contains some common polyatomic ions. using the charge on these ions and the idea of valence, predict the formulas for the following: nitrate no3 - phosphate po4 -3 sulfate so4 -2 acetate c2h3o2 -1 ammonium nh4 + chromate cro4 -2 carbonate co3 -2 dichromate cr2o7 -2 permanganate mno4 -1
aluminum nitrate alno3 al3no3 al(no3)3 al(no)3

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

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.

its first and third is your answer i did the qustion the fourth isnt right