To determine how many tablets the patient will receive, you first need to convert the ordered dose from milligrams to grams since the available medication is in grams.
1 gram (g) = 1000 milligrams (mg)
So, 500 mg is equal to:
\[ 500 , \text{mg} = \frac{500}{1000} , \text{g} = 0.5 , \text{g} \]
Now, you have 1 g tablets available. Since the patient needs 0.5 g of the medication, you can calculate how many tablets are needed:
\[ \text{Number of tablets} = \frac{\text{Dose required in grams}}{\text{Amount per tablet in grams}} = \frac{0.5 , \text{g}}{1 , \text{g}} = 0.5 , \text{tabs} \]
Since you cannot give half a tablet in this case, you would typically round down (if you can't split tablets) or check if a different dosage form is available.
Therefore, the patient will receive 0.5 tabs, which typically cannot be administered directly from 1 g tablets without splitting. So you may need to clarify the administration with the physician.