Write the correct formula for each compound named below. Show the from which it is formed.

Explanation:

Sodium Chloride = Na⁺ + Cl⁻ = NaCl

Lithium bromide = Li⁺ + Br⁻ = LiBr

Magnesium fluoride = Mg ⁺²  +  F⁻ = Mg₂F.

Potassium Oxide = K⁺ + O⁻² = K₂O

Calcium sulphide  = Ca⁺² + S⁻² = CaS

Aluminum Iodide = Al⁺³ + I⁻ = Al I₃

Barium bromide = Ba⁺² + Br⁻ = BaBr₂

Aluminum sulphide = Al⁺³ + S⁻ = Al₂S₃

Calcium Phosphide = Ca⁺² + P⁻³ = Ca₃P₂

Lithium Nitride = Li⁺ + N⁻³ = Li₃N

Magnesium Oxide = Mg⁺² + O⁻² = MgO

Aluminum Fluoride = Al⁺³ + F⁻ = AlF₃

Lithium Oxide = Li⁺ + O⁻² = Li₂O

Beryllium iodide = Be⁺² + I⁻ = BeI₂

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

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg