1 cm ------------ 10 mm
5,678 cm ------- ?
5,678 x 10 / 1 => 56,78 mm
E=hc/λ =6.626×10^-34×3 ×10^8 / 3×10^7 × 10^-9 = 6.626×10 ^-24J.
Bottom line Your dissolution reaction<span> is endothermic, but because </span>dissolution reactions<span> lead to states of higher entropy, your particular </span>reaction is spontaneous<span> (it occurs) at your specific temperature nonetheless</span><span />
B. A gram would have a lot more molecules of propane than a mole