When doing a problem like .3065g/138.03ml is the answer 2.220532x10(^3) g/ml or is it written differently?

It is written differently.

Explanation:

The answer as given is not written correctly.

First, we must consider significant figures. Any non-zero number is a significant figure, and zeroes between significant figures are also significant, so 0.3065 has four significant figures and 138.03 has five significant figures. (Leading zeroes before the decimal point are not significant)

When two numbers are multiplied or divided, the answer has the same number of significant figures as the number that had the least number of significant figures. So in this case, the result will have four significant figures.

The result is written in scientific notation:

(0.3065)/(138.03) = 2.221 x 10⁻³