A marine biologist measures the volume of a seawater sample. The volume is 1285mL . What is the volume in liters? Write your answer as a decimal.

A chemist prepares a solution of copper(II) sulfate CuSO4  by measuring out  16.5g  of copper(II) sulfate into a  350.mL  volumetric flask and filling the flask to the mark with water.   Calculate the concentration in /molL  of the chemist's copper(II) sulfate solution. Round your answer to  3  significant digits.

A chemist prepares a solution of barium chloride (BaC12) by measuring out 12.9 g of barium chloride into a 50. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's barium chloride solution. Round your answer to 2 significant digits. mol/L X

Measurement and Matter Adding or subtracting and multiplying or dividing measurements 0/3 B A chemistry student must write down in her lab notebook the concentration of a solution of potassium chloride. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: The label on the graduated cylinder says: empty weight: 1.500 g She put some solid potassium chloride into the graduated cylinder and weighed it. With the potassium chloride added, the cylinder weighed 40.22 g. She added water to the graduated cylinder and dissolved the potassium chloride completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 172.08 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. A Om g·mL -1 □×1 x10 x 5