PLEASE HELP!! A model stands on a scale and finds her weight to be 105 pounds. If
the pressure exerted by her feet on the scale is 2.16 pounds per
square inch, what is the area of her feet in cubic centimeters?
__cm2

313.5cm²

Explanation:

Given parameters:

Weight of model  = 105pounds

Pressure applied on the scale by model = 2.16pounds per square inch

Unknown:

Area of her feet in cm² = ?

Solution:

Pressure is the force per unit area;

     Pressure  =

Input the parameters and solve;

                2.16  =

       105  = 2.16 x Area

        Area =   = 48.6in²

We need now to convert the in² to cm²

          1in² = 6.45cm²

        48.6in² = 48.6 x 6.45  = 313.5cm²

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.