资讯

Livestrong.com on MSN3 个月
Phenylephrine for Colds: Why It Doesn’t Work and What You Should Use Instead
You can find it as a solo med in products like Sudafed PE (not regular Sudafed) and Suphedrine PE, or combined with other ...
C&EN3 年
Activity – Fizz Race
As you start the stopwatch, slide the powdered Alka-Seltzer down the crease of the paper into the third cup of vinegar. Stop the time when the bubbling ends. Add 125 mL (approximately ½ cup) of hot ...