(b) as a woman walks, her entire weight is momentarily placed on one heel of her high-heeled shoes. calculate the pressure exerted on the floor by the heel if it has an area of 1.60 cm² and the woman’s mass is 55 kg. express the pressure in 106 pa (n/m2) for example, if the pressure is 68

P = 3.37 x 10 ⁶ Pa

Explanation:

Given that

A= 1.6 cm²

m = 55 kg

The weight W= m g

W= 55 x 9.81                       ( g= 9.81 m/s²)

W= 539.55 N

We know that force per unit area is known as pressure( P)

P = W/A

By putting the values

P= 539.55/1.6    N/cm²

P=337.21 N/cm²

P=337.21 x 10⁴ N/m²

P = 3.37 x 10 ⁶ Pa

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  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz