3. Prepare 0.45 g . The strength available is 300 mg per mL

Did you know that the ability to prepare precise concentrations has been essential in various scientific discovery milestones? For instance, the formulation of vaccines relies heavily on accurate dosages, making it vital to master calculations and dilutions. The history of vaccines showcases how careful preparation has saved millions of lives throughout time! When you're preparing a solution, always double-check your calculations and measurements! A common mistake is confusing milligrams with grams, which can lead to incorrect dosages. It's a good practice to keep a calculator handy and revisit those foundational chemistry principles—measure twice, mix once! Remember, even the smallest error can significantly impact experiments or treatments.