What is the mass of an object that has a density of 2.3 g/mL And a volume of 343ML

Need on both questionswill markbr />

How many grams are in 68.2 molecules of br2?

Which would freeze at a higher temperature: the great salt lake or lake tahoe? a. lake tahoe would freeze at a higher temperature. b. the great salt lake would freeze at a higher temperature. c. both lakes would freeze at the same temperature.