Which of the does not make up DNA? a Nucleotides b Ribose Sugar Cells d Phosphates

Which type of bond is present in hydrogen sulfide (h2s)? the table of electronegativities is given. a. hydrogen b. ionic c. nonpolar covalent d. polar covalent

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change