What is the mass of a piece of platinum if the volume is 1.65 cm and the density is 21.45g/cm? asa

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.

Draw the structure for 5-isopropyl-2-methyl-3-nonene

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?