2. what effect does amount of water have on plant growth?
independent variable:
dependent variable:
3. does a student's bedtime effect a student's energy level?
independent variable:
dependent variable:
4. what effect does exercise have on strength?
independent variable:
dependent variable:
5. does a person's height effect their ability to play basketball?
independent variable:
dependent variable:

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.)

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?