Which mixture can be classified as a homogeneous mixture? . a.. salad dressing. b.. soil. c.. tap water. d.. sand

A homogeneous mixture is a mixture which has uniform composition and properties throughout - it is identical in its every part. So, having this in mind, the correct answer is C. tap water - even though it may have different levels of dissolved minerals and gases.

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.