How many kJ of energy are needed to convert 600g of a mystery substance with a molar enthalpy of vaporization of 14.3kJ/mol and molar mass of 42g/mol?

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

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.