To find the total mass of salt contained in the container, you need to sum up the masses of sodium citrate, potassium phosphate, and magnesium chloride.
Total mass of salt = Mass of sodium citrate + Mass of potassium phosphate + Mass of magnesium chloride
Total mass of salt = 280.0 mg + 112.55 mg + 13.566 mg
Now, add these values to find the total mass of salt:
Total mass of salt = 406.116 mg
To convert milligrams (mg) to kilograms (kg), divide the total mass by 1000:
Total mass of salt in kg = 406.116 mg / 1000 = 0.406116 kg
Therefore, the total mass of salt contained in the 15 L container is approximately 0.406 kg.
