1. On hand: Magnesium sulfate 30 grams is mixed in 500 ml Lactated Ringers. Order: infuse a
maintenance dose of magnesium sulfate at 4 grams/hour. At what rate should the nurse set the
pump:

The IV will run

Step-by-step explanation:

From the question we are told that

   The mass of Magnesium sulfate is  

   The volume of the Magnesium sulfate  

   The rate at which the dose of the solution (Magnesium sulfate + Lactated Ringers. ) is infused is  

The concentration of Magnesium sulfate in Lactated Ringers  is mathematically evaluated as

substituting values

This implies that

     0.06 g of Magnesium sulfate is in every 1 ml of  Lactated Ringers

So  4 g  of  Magnesium sulfate is in x ml of  Lactated Ringers

So

So the amount of the solution in ml that is been infused in 1 hour is  

3x + 4y -25 =0 represents the amount of change sianna should recieve