Final answer:
By setting up a proportional ratio and solving for X, we find that there are 35 g of dissolved salt in 1 kilogram of seawater; thus, the answer is A) 35 g.
Step-by-step explanation:
To find out how many grams of dissolved salt are in 1 kilogram of seawater when a 13-kilogram sample contains 455 grams of dissolved salt, we can set up a simple ratio. Since the mass of the seawater sample is to the mass of the salt as 1 kilogram of seawater is to X grams of salt, the equation is 13 kg (seawater) / 455 g (salt) = 1 kg (seawater) / X g (salt).
Solving for X gives us X = (455 g) / (13 kg), which simplifies to X = 35 g of dissolved salt per 1 kilogram of seawater.
Therefore, the answer is A) 35 g.