What are the significant problems in 21st century america?

Can you answer number 5 for me . hurry

You need to start an experiment and the instructions are to mix 2 g of sodium bicarbonate with 50 ml of distilled water and then mix the solution. describe what lab apparatus you would use and what safety precautions you must observe when completing this experiment.

Elist of items that aditi is planning to include in her narrative essay. 1. i stayed after school once to work on a monologue with a teacher. 2. i learned about the audition for the spring musical at my school. 3. i realized that i need to practice more if i really want a role. 4. i went to the audition and barely remembered all my lines. what is the best order for these items? 1, 3, 2, 4 1, 2, 4, 3 2, 4, 3, 1 2, 1, 4, 3