Question 1 (1 point) ✓ Saved
When the equation below is balanced, what coefficient is needed for LiOH?
Li + __H20 --> __LiOH + _H2
04
3
2
1
Previous Page
Next Page
Page 1 of 15

2

Explanation: 2Li + 2H2O → 2LiOH + H2

***If you found my answer helpful, please give me the brainliest. :) ***

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

yes

ya te ayud espera