Can someone helpful answer the question please?

type of surface

Explanation:

The independent variable is the variable that doesn't depend on anything else. The dependent variable would be the time in seconds because that depends on the independent variable which is the type of surface.

hope this helps :)

you should just be yourself and not let any body tell you other wise.

explanation:

why?

because if they don't love you for your self then they don't deserve you.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l