Question

There are 70 grams of dissolved salt in certain 2000 gram of sample of seawater.The amount of dissolved salt is p% of the sample of seawater by mass.What is value of p?

Answer 1

The mass percent of dissolved salt in seawater, represented by p%, is calculated as the mass of the solute (salt) divided by the mass of the solution (seawater), then multiplied by 100. Using the given masses, the calculation reveals that p% equals 3.5%.

Step-by-step explanation:

To calculate the value of p, which represents the mass percent of dissolved salt in seawater, we use the formula:

Percent by mass (p%) = (mass of solute / mass of solution) × 100%

Here, the mass of the solute (salt) is 70 grams, and the mass of the solution (seawater) is 2000 grams. Substituting these values into the formula, we get:

p% = (70 g / 2000 g) × 100%

Calculating this, we receive:

p% = 0.035 × 100%

p% = 3.5%

Therefore, the amount of dissolved salt is 3.5% of the sample of seawater by mass.