The initial mass of your soda and bottle before you let any carbon dioxide out is 297.770 g. After letting out the initial carbon dioxide, the mass of the soda and bottle is reduced to 296.634 g. What is the mass (in g) of carbon dioxide that was released during this process? Report your answer to three decimal places.

A certain liquid X has a normal boiling point of 105.70°C and a boiling point elevation constant =Kb2.16·°C·kgmol−1. A solution is prepared by dissolving some potassium bromide (KBr) in 400.g of X. This solution boils at 107.3°C. Calculate the mass of KBr that was dissolved. Round your answer to 2 significant digits.  ____g

Measurement and Matter Adding or subtracting and multiplying or dividing measurements 1/3 B A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. 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: 7.2 g . She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 63.517 g. . She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 91.0 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. g-mL G

A chemist prepares a solution of barium chlorate BaClO32 by measuring out 10.μmol of barium chlorate into a 150.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /molL of the chemist's barium chlorate solution. Round your answer to 2 significant digits.