How much heat must be applied to a 40.2-g sample (s = 0.129 J/(g • °C)) in order to raise its temperature from 28.2°C to 351.5°C?

Why is retrograde motion an apparent motion

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.

Me soon im confused much mass would a mole of hydrogen molecules contain? recall that hydrogen is diatomic. g/mol