contestada

A saline solution used in intravenous drips for patients who cannot take oral fluids contains 0.92% (w/v) NaCl in water. How many grams of NaCl are contained in 250 mL of this solution? 0.0037 g Nai O 0.92 g Naci O2.3 g Naci 2.7 g Naci .

Respuesta :

Answer:

2.3 g NaCl

Explanation:

Given the concentration of the NaCl  solution = 0.92% (w/v)

It means that 0.92 g of NaCl is present in 100 mL of water.

Thus,

100 mL of water contains 0.92 g of NaCl

To find, amount of NaCl in 250 mL of water

So,

1 mL of water contains [tex]\frac {0.92}{100}\ g[/tex] of NaCl

250 mL of water contains [tex]\frac {0.92}{100}\times 250\ g[/tex] of NaCl

2.3 g of NaCl is present in 250 mL of this solution.