if an object has a density of 2.5 g/cm3 and it is placed in a tank of water, will the object float or sink in water

What is the mass of 4 molecules of co2

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?

Asolution is produced in which water is the solvent and there are four solutes. which of the solutes can dissolve better if the solution is heated?