There are 10 drops of hexane in one ml, it took 39 drops to form a phospholipid bilayer, Assuming the molecules are square, what is the area of one molecule?

Solution :

Assume that the diameter of the watch glass is 9.5 cm.

There are 10 drops of hexagon in 1 mL.

V = volume of hexagon in per drop =  mL per drop

V = 0.1 mL per drop

N = number of drops to form phospholipid layer

N = 39 (assumed)

= volume of hexagon required to form phospholipid layer

= V x N

= 0.1 x 39  

   = 3.9 mL

Since 1 mL = 1

∴    = 3.9

d = diameter of the watch glass = 9.5 cm

A = area of one molecule

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.