Which expression is equivalent to ((1 - -) +r) - ) - )? A. (1-r)*- B. 2(1 – r) + 2r C. (1 - r)(1-r) (1 + r) D. (1 - r)* + 2r(1 - r) + y2 o 0 o​

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?