Which statement is true? a) unicellular organisms cannot obtain energy or reproduce, but they can maintain structure (homeostasis). b) unicellular organisms don't have to do anything - they are only just one cell! c) unicellular organisms have to meet the 3 main challenges of life. they have to obtain energy, reproduce, and maintain structure (homeostasis). d) unicellular organisms are not living.

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

What is the formula that this ionic compounds could form sr2+p3-o2-

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.)