4. which one of the following groups of chemical compounds is composed entirely of organic compounds? a. ch3och3, ca3(po4)2, co2, h2co3 b. c2h2, ch4, cacl2, cacn2 c. c2h4o, ch2o, caso4, c3h5(oh)3 d. c6h6, c2h5oh, c6h5ch3, c3h5(no3)3

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.