Each sentence describes potential and kinetic energy at various locations on a slide. Complete each statement by selecting the p
2 answers:
The question is incomplete, the complete question is;
Each sentence describes potential and kinetic energy at various locations on a slide. Complete each statement by selecting the position of the object on the slide.
An object at position has all kinetic energy. A B or C
An object at position has all potential energy. A B or C
An object at position has about half potential energy and half kinetic energy. A B or C
Answer:
An object at position C has all kinetic energy.
An object at position A has all potential energy.
An object at position B has about half potential energy and half kinetic energy.
Explanation:
Lets take a good look at the image.
At position A, the object is stationary and we know that the energy possessed by an an object by virtue of its position is known as potential energy. Hence at A, the energy possessed by the body is all potential.
At position B, the total mechanical energy of the object becomes potential energy + kinetic energy as the object is now in motion.
At position C, the object is still in motion and the energy is all kinetic.
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Answer:
The number of formula units in 3.81 g of potassium chloride (KCl) is approximately 3.08 × 10²²
Explanation:
The given parameters is as follows;
The mass of potassium chloride produced in the chemical reaction (KCl) = 3.81 g
The required information = The number of formula units of potassium chloride (KCl)
The Molar Mass of KCl = 74.5513 g/mol
Therefore, we have;
1 mole of a substance, contains Avogadro's number (6.022 × 10²³) of formula units
Therefore;
0.051106 moles of KCl contains 0.051106 × 6.022 × 10²³ ≈ 3.077588 × 10²² formula units
From which we have, the number of formula units in 3.81 g of potassium chloride (KCl) ≈ 3.08 × 10²² formula units.