You are writing a report on whether global warming really exists. which of the following resources would be the most scientifically reliable? an article containing documented experiments and data a newspaper article quoting leaders of several countries a website with articles posted by people around the world an article containing a poll taken of students at leading universities

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.)

Is a pencil falling to the floor anon contact force, a force, or a contact force

To calculate the molarity of a solution, you need to know the moles of solute and the