PLEASE HELP ASAP! AND PLEASE DO NOT GIVE ME ANY VIRUSES! What niche do earthworms occupy in an ecosystem?

Earthworms are nature's recyclers; they break down dead plant materials into compost.

Gardeners use earthworms to make compost tea.

Earthworms break down hard rocks and minerals into soil.

Earthworms are hermaphrodites.
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Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1: