Activity 2.PERCENT BY MASS

FORMULA

Eq. 1:percent by mass = mass of solute/mass of solute × 100
or
Eq.2:percent by mass=mass of solute/mass of solute+ mass of solvent ×100

1. What is the percent by mass concentration of a solution that contains 7.20g of salt dissolved in 25.5g of water?

2. How many grams of glucose (C6H1206) are needed to prepare 300mL of a 4% glucose solution?

3. A saline solution with a mass of 315 g has 30.5 g of NaCl dissolved in it. What is the mass/mass percent concentration of the solution?

4. What is the percent by mass of 5.0 g of iron (||) sulfate dissolved in 75 g of water?

5. What is the percent by mass of 8.0g copper is added to enough zinc to produce 100g an alloy?​

please pasagot, need kona kase ngayon!!​

brainliest ko makasagot!!