Question

Normal saline, a 0.90% (w/v) solution of salt (NaCl) in water, is often used as an iv carrier fluid in hospitals.

calculate the mass of NaCl in 120 ml of this solution. be sure your answer has a unit symbol and is rounded to the correct number of significant digits.

Answer 1

The mass of NaCl in 120 mL of a 0.90% normal saline solution is 1.08 grams, which is calculated by applying the mass/volume percent formula with the given concentration and volume.

Step-by-step explanation:

To calculate the mass of NaCl in a 0.90% (w/v) normal saline solution for 120 mL, we use the mass/volume percentage formula. Since the solution is 0.90% NaCl, this means there are 0.90 grams of NaCl in every 100 mL of solution. Therefore, for 120 mL, the calculation would be as follows:

(0.90 g NaCl / 100 mL solution) × 120 mL = 1.08 grams of NaCl

It is important to round the answer to the correct number of significant digits, which in this case is three significant digits, as the percentage (0.90%) has two decimal places and the volume (120 mL) has three.