Calculate the molecular mass of the element They give:H=1,AI=27,S=32,0=16,Cu=64,P=31 ,Mg=24,N=14,Na=23

Compared with the freezing-point depression of a 0.01 m c6h12o6 solution, the freezing-point depression of a 0.01 m nacl solution is

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear

Can someone me with 3 and 4 plz. this is for masteries test.