Step-by-step explanation:
To prepare a 5% glucose solution in 400 mL, you need to calculate the amount of glucose required.
Step 1: Convert the percentage to a decimal by dividing by 100. 5% becomes 0.05.
Step 2: Multiply the volume of the solution (400 mL) by the decimal fraction obtained in step 1 (0.05) to find the grams of glucose needed.
400 mL × 0.05 = 20 grams
You would need 20 grams of glucose to prepare 400 mL of a 5% glucose solution.