It is estimated that a slice of pecan pie has about 575 nutritional calories (1 nutritional calorie = 1 kilocalorie). Approximately how many minutes of walking are required to burn up as energy the calories taken in after eating a slice of pecan pie (without the whipped cream)? Walking uses up about 250. kcal/h.

Mg-26 and mg-24 are pair of isotopes. isotopes are defined as atoms of the same element having same atomic number but different mass number. i hope that was .

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.