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The answers to your questions are given below below

Explanation:

1. The calculation will require multiple steps because the unit of measurement of the theoretical and actual yield is different.

2. Determination of the percentage yield.

We'll begin by converting 6733 mg to g. This can be obtained as follow:

1000 mg = 1 g

Therefore,

6733 mg = 6733 mg × 1 g / 1000 mg

6733 mg = 6.733 g

Finally, we shall determine the percentage yield. This can be obtained as follow:

Theoretical yield = 14.79 g

Actual yield = 6.733 g

Percentage yield =?

Percentage yield = Actual yield /Theoretical yield × 100

Percentage yield = 6.733 / 14.79 × 100

Percentage yield = 673.3 / 14.79

Percentage yield = 45.5%

the only liquid elements at standard temperature and pressure are bromine (br) and mercury (hg). although, elements caesium (cs), rubidium (rb), francium (fr) and gallium (ga) become liquid at or just above room temperature.

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