If a 1.00 cm3 solid cube of alumina ceramic initially at 300c is placed in 50 ml of h2o initially at 25c in a closed, insulated container: (a) what will be the final temperature of the system when thermal equilibrium is attained. (use relevant values in appendix b of the callister text and assume that the values of density, heat capacity, etc. are constant with temperature). (b) by what amount would the density of the alumina actually change due upon cooling?

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.)

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by