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SpyIntel [72]
2 years ago
15

Benjamina started her walk from the front door of her ground floor apartment.She walked 6 meters to the corner of the building a

nd then turned the corner and walked 10 meters to her friends apartment.Identify the difference between the distance she walked and her displacement.
Chemistry
1 answer:
Nookie1986 [14]2 years ago
8 0

Answer:

See explanation

Explanation:

The major difference between distance and displacement is that distance is a scalar quantity while displacement is a vector quantity. Scalar quantities have magnitude without direction while vector quantities have both magnitude and direction.

The distance covered by Benjamina in both cases just refer to the difference in her position at each time without reference to the direction in which she changed her position.

Her displacement will clearly mention the direction in which she moved both when she walked to the front door of her apartment and when she walked to a friend's apartment.

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Answer:

1.35 g

Explanation:

Data Given:

mass of Potassium Permagnate (KMnO₄) = 3.34 g

Mass of Oxygen: ?

Solution:

First find the percentage composition of Oxygen in Potassium Permagnate (KMnO₄)

So,

Molar Mass of KMnO₄ = 39 + 55 + 4(16)

Molar Mass of KMnO₄ = 158 g/mol

Calculate the mole percent composition of  Oxygen in Potassium Permagnate (KMnO₄).

Mass contributed by Oxygen (O) = 4 (16) = 64 g

Since the percentage of compound is 100

So,

                        Percent of Oxygen (O) = 64 / 158 x 100

                        Percent of Oxygen (O) = 40.5 %

It means that for ever gram of Potassium Permagnate (KMnO₄) there is 0.405 g of Oxygen (O) is present.

So,

for the 3.34 grams of Potassium Permagnate (KMnO₄) the mass of Oxygen will be

                  mass of Oxygen (O) = 0.405 x 3.34 g

                  mass of Oxygen (O) = 1.35 g

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Explanation:

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The acceleration of gravity on the moon is 1.6 m/s 2 and on earth it is 9.80 m/s 2. If the weight of a person on earth is 400 N,
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2 years ago
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A chemical reaction requires 31.39 kJ. How many kilocalories does this correspond to?
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<h3>Answer:</h3>

7.502 kilo calories

<h3>Explanation:</h3>

<u>We are given;</u>

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Second we convert Joules to calories using a suitable conversion factor

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Thus;

31390 Joules will be equivalent to;

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