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?

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.