What is the mass of salt needed to make 150 mL of a 100 mL salt solution?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

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.