Question

What is the percentage by mass of a 250 gram salt dissolved in 750 grams of water ?

Answer 1

Answer:

Mass of salt = 250 g

Mass of water = 750 g

Total mass = 1000 g

Percentage by mass of salt = mass of salt/ total mass × 100

% by mass = (250 / 1000) × 100

= 100/4

= 25 %

25% is the salt in water

Answer 2

The percentage by mass of a 250 gram salt dissolved in 750 grams of water  is 25 %

Explanation:

Mass of solute (salt) = 250 g

Mass of solvent (water)= 750 g

Mass of solution = Mass of solute (salt) + Mass of solvent (water) = 250 g + 750 g = 1000 g

Percentage of an element in a compound:

${\text{percentage by mass}=\frac{\text{mass of substance}}{\text{Total Mass}}\times 100$

Percentage of salt (solute):

${\text{percentage by mass}}=\frac{\text{mass of salt}}{\text{Mass of solution}}\times 100$

${\text{percentage by mass}}=\frac{250g}{1000g}\times 100=25\%$

Learn More about mass percentage

https://brainly.com/question/2599902

https://brainly.com/question/13142630