Agricultural scientists are trying a new man-made vitamin on tomato plants to make them bigger and redder. they are putting the vitamin in the soil of a group of plants, and are also observing a group of plants that have received nothing other than regular water. this second group is the:
variable group.
experimental group.
placebo group.
control group

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.