A compound of formula C5H12 gives 1 signal in the 1H NMR and 2 signals in the 13C NMR. The compound is

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water

Ithink the answer is d.

Heat of fusion= heat/mass  heat of fusion = 12.03kj/36 g= 0.3342 kj/g or 334.2 j/g

The disturbance is only parallel to the motion of the wave.