The unit "troy ounce" is often used for precious metals such as gold (au) and platinum (pt) (1 troy ounce= 31.103 g). (a) a gold coin weighs 2.41 troy ounces. calculate its mass in grams. (b) is a troy ounce heavier or lighter than an ounce (1lb =16 oz; 1lb =453.6 g)?

Imagine a small synthetic vesicle made from pure phospholipids enclosing an interior lumen containing 1 mm glucose and 1 mm sodium chloride. if the vesicle is placed in pure water, which of the following happens faster? a. na+ diffuses out. b. cl– diffuses out. c. h2o diffuses in. d. glucose diffuses out. e. sodium chloride diffuses out.