Final answer:
The quantity 594 mg is equivalent to 0.594 g, since there are 1000 milligrams in 1 gram.
Step-by-step explanation:
The question is asking us to find which quantity is equivalent to 594 mg. To convert milligrams to grams, we need to remember that 1 gram is equal to 1000 milligrams.
When converting 594 mg to grams, we divide by 1000:
594 mg ÷ 1000 = 0.594 g.
Therefore, the correct answer is option a) 0.594 g. This means that 594 mg is equivalent to 0.594 g.