A <span> sample of water (H2O) has a mass of 1.0 g which is equal to 0.06 moles of H2O. TO calculate this, we use the relation of the molar mass which is for water is 18.02 grams / mol of H2O.
1.0 g </span><span>H2O</span> ( 1 mol H2O / 18.02 g H2O) = 0.06 mol H2O
It is option A 4s cause n=4, l=1 this is 4s orbital
Chemical Change can produce a new substance. The effects of chemical change differs from the effects of physical change because physical change is simple a change within a substance through natural procedures like freezing and melting.