Question

Isotonic saline is 0.89% NaCl (w/v). Suppose you wanted to make 1.0 L of isotonic solution of NH4Cl. What mass of NH4Cl would you need?

Question 23 options:

1.6 g


8.1 g


8.9 g


54 g

Answer 1

NaCl ionizes to two particles. Same as NH4Cl. 0.89% NaCl is 8.90g/L
So 8.9 g NaCl x (molar mass NH4Cl/molar mass NaCl) = ? g NH4Cl in 1 L solution.

Answer 2

8.9

Answer 3

54

Answer 4

An object of weight 150N moves with a speed of4.5m/s. In a circular path of radius 3m.Calculation the centripetal acceleration and the magnitude of the centripetal forces. (take g =10m/s2

Answer 5

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