Question

A sample weighing 30.0 grams contains 1.5g of salt/ determine the percent salt found in the sample

Answer 1

To calculate the percent of salt in the sample, divide 1.5g (the mass of salt) by 30.0g (the total mass of the sample) and multiply by 100, yielding a 5 percent salt concentration.

Step-by-step explanation:

The question involves calculating the percent composition of a compound in a mixture, which is a topic in chemistry. To find the percent of salt in the sample, you would divide the mass of the salt by the total mass of the sample, then multiply the result by 100 to get the percentage.

In this case, the calculation would be:

• Mass of salt (NaCl) = 1.5 g
• Total mass of sample = 30.0 g
• Percent salt = (Mass of salt / Total mass of sample) x 100%
• Percent salt = (1.5 g / 30.0 g) x 100%
• Percent salt = 5%

Therefore, the sample contains 5 percent salt.

Answer 2

Percentage by mass is the amount in mass of a component in a mixture per 100 unit of mass of the total mixture. Percentage by mass is the same as %w/w. We can determine this by dividing the mass of the solute with the total mass of the mixture. We calculate as follows:

Percent salt = 1.5 g salt / 30.0 g x 100 = 5%