Keenan and Demetria both grew up in the United States but their parents immigrated from South Africa. They want to start a family, but both of them had one parent with Sickle Cell Anemia. They have both been healthy their whole lives and have been tested to see if they carry the gene. Look at their blood work and tell them their results. 2. What are the chances that they will have a child with sickle cell anemia? (Show punnett square) 3. What are the chances that they will have a child who carries the gene? 4. What are the chances that they will have a child who does not have the gene at all?

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

What is the work done by the electric force to move a 1 c charge from a to b?