Acids and bases, when mixed together, create a chemical reaction. During this chemical reaction the atoms rearrange and create new substances. a. What has to be true about the substances before and after the reaction if the reaction took place in a closed system?

b. What states why that has to be true?

Calculate the number of moles of ethane in 100 grams

According to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? view available hint(s) according to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? trigonal bipyramidal tetrahedral square planar determination of electron geometry requires information on whether the electron groups are lone pairs or bonding groups.

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves