An 79.4 kg person puts on a life jacket, jumps into the water, and floats. the jacket has a volume of 0.03 m3 and is completely submerged under the water. the volume of the person’s body that is under water is 0.064 m3. what is the density of the life jacket? (water density = 1000 kg/m3)

1. baking powder is a 1: 1 molar mixture of cream of tartar (khc4h4o6) and baking soda (nahco3). a recipe calls for two teaspoons (a total of 8.0 grams) of cream of tartar. how much baking soda must be added for both materials to react completely?

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.