The definition of mass percent follows:Mass percent 100% 100%For example, suppose a solution is prepared by dissolving 1.0 g of sodiumchloride in 48 g of water. The solution has a mass of 49 g (48 g of H 2 O plus1.0 g of NaCl), and there is 1.0 g of solute (NaCl) present.
Rule of thumb calculation for steak calories per serve is roughly 170 calories per 100 grams. Calories in steak is based on a 3.5 ounce serving or 100 grams. Calories are approximate and can alter with fat marbling of the meat. Frying in fat will add lots of calories. You should grill meat and trim fat from the cut.
A typical tuna steak is usually much larger than a single serving (3 ounces or 100 grams). A medium tuna steak cooked without fat (measuring approximately 6.75 x 2.5 inches) provides 195 calories, 42 grams of protein, 1 grams of carbohydrate, 2 grams of fat and 525 milligrams of sodium.