The reaction of gaseous H2 and liquid Br2 to give gaseous HBr has AH =-17.4 kcal/mol (-72.8 kJ/mol) and AS = 27.2 (cal/mol · K) (114 J/(mol. K)).

Ineed with my science work! it’s due tomorrow!

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?