One night, the power went out, so Jordan and his family lit candles. When Jordan went to bed, he checked the candles and noticed that the wax was liquid and running down the sides. When he woke up in the morning, the candles were not lit, and the wax was a solid layer around the bottom. Which statement best describes what happened to the wax? A. The liquid wax gained heat, causing it to condense into its solid form overnight. B. The liquid wax gained heat, causing it to freeze into its solid form overnight. C. The liquid wax lost heat, causing it to condense into its solid form overnight. D. The liquid wax lost heat, causing it to change phase into its solid form overnight.

Can you guys me with question no. 5!

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.)

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils. the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.