patulong po kailangan ko po kasi bukas

1. A saline solution with a mass of 500 g has 36 g of NaCl (table salt) dissolved in it. What is the mass/mass percent concentration of the solution?
a. What is asked?
b. What is/are given?
c. What is the formula?
d. Write the solution.
e. Final Answer.

2. Compute the percent by mass of 240 grams of iron fillings(solute) in a 780 grams of sand.
a. What is asked?
b. What is/are given?
c. What is the formula?
d. Write the solution.
e. Final Answer​