28)
many people avoid processed food to eliminate unnecessary ingredients like food dyes and excess sodium from their diets. a
study calculated that every 70.0 g serving of a certain brand of mac & cheese contains 260 calories, 3 g of fat, 16 g of
carbohydrates, 9 g of protein, 570 mg of sodium, and 17.6 mg of food dyes. what is the mass percent of sodium in the mac &
cheese?
0.8149
12.3%
25.1%
45.6%

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

Write and balance the chemical equation that represents the reaction of aqueous sulfuric acid with aqueous sodium hydroxide to form water and sodium sulfate. include phases.