5.0 gram sample of calcium carbonate contaminated with the volatile impurities left Residue of 2.2 gram on strong heating what is the percentage of pure caco3 in the sample in { CA = 40 C=12 and O = 16}​

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-