A 2.714 gram sample of a hydrate of sodium carbonate is placed in a test tube and heated until the mass is constant. If the mass of the dry sodium
carbonate is 1.006 grams. What was the mass of water driven off and what
was the percentage of water in the hydrate?

Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration. what is the titrant volume? titrant analyte indicator titrant volume analyte concentration naoh ch3cooh phenophthalein select one: a. 20.0 ml b. 27.0 ml c. 30.0 ml d. 24.0 ml

Can someone me with 3 and 4 plz. this is for masteries test.

Air can be considered a mixture. which statement does not explain why?