Suppose now that you wanted to determine the density of a small crystal to confirm that it is boron. from the literature, you know that boron has a density of 2.34 g/cm^3. how would you prepare 20.0 ml of the liquid mixture having that density from pure samples of chci3 ( d= 1.492 g/ml) and chbr3( d= 2.890 g/ml)? (note: 1 ml = 1 cm^3.)

In any energy conversion, some of the energy is lost to the environment as question 5 options: electrical energy potential energy sound energy thermal energy

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.)

What type of electromagnetic radiation has a shorter wavelength than blue light