Which item below is not an example of how the general rule for dissolving works?
a.
oil and water do not mix.
b.
oil and water mix.
c.
water and methanol mix.
d.
methanol and oil do not mix.
e.
oil and grease mix.

B.  Oil and water mix.

Explanation:

The solubility of substances is governed by: Like dissolves like, which states that polar compounds are soluble in polar solvents and non polar compounds are soluble in non polar solvents.

Oils and grease are non polar in nature due to less difference between the electronegativities of carbon and hydrogen and thus are soluble in non polar solvents only.

Water and methanol being polar solvents get dissolved in each other.

Thus oil and water do not mix as water is polar and oil is non polar.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: