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drek231 [11]
3 years ago
12

A man of 450 N covers an area of 0.0015m2 while standing on his feet.calculate the pressure exerted by him on the ground.

Chemistry
1 answer:
ahrayia [7]3 years ago
6 0

Answer:

3×10⁵ N/m²

Explanation:

From the question given above, the following data were obtained:

Force (F) = 450 N

Area (A) = 0.0015 m²

Pressure (P) =?

Pressure is simply defined as the force per unit area. Mathematically, it is expressed as:

Pressure (P) = Force (F) / Area (A)

P = F/A

With the above formula, we can obtain the pressure exerted by the man on the ground. This can be obtained as follow:

Force (F) = 450 N

Area (A) = 0.0015 m²

Pressure (P) =?

P = F/A

P = 450 /0.0015

P = 3×10⁵ N/m²

Thus, the pressure exerted by the man on the ground is 3×10⁵ N/m².

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<u>Only C can dissolve in water because its solubility is greater than 0.375 g/mL</u>

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<u></u>

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In the question , the solubility of A , B and C in 100 are given as :

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Solubility = \frac{15}{100} = 0.15 g/mL

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Solubility = \frac{65}{100} = 0.65 g/mL

Since ,Solubility of A and B is less than 0.375 g/mL

<u>So A and B  can't dissolve in water at 25°C</u>

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B is in excess by 37.5 - 35 = 2.5 g

<u>Hence 22.5 g of A remain undissolved</u>

<u>Hence  2.5 g of B remain undissolved </u>

<u>Only C can dissolve in water because its solubility is greater than 0.375 g/mL</u>

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