please solve all

1. (3 pts) A 27.00mL aliquot of seawater weighs 27.66g. What is its density in units of kgm3 ? 2. (3pts) That same seawater sample contains 7.2mgchlm3. What is the chlorophyll concentration in units of gL1 ? 3. (4 pts) You are interested to investigate the availability of dissolved inorganic nitrogen (as ammonia and nitrate) in coastal waters. Your analyses indicate those concentrations are 0.34mgNH4+L1 and 0.22mgNO3L1 respectively. Based on your data, what is the total concentration of dissolved inorganic nitrogen (as NH4++NO3), in units of M ? Note: You will need the molecular weight of each compound and calculate them separately first