In the chemical compound Li2O, what is the percent composition of oxygen? Type your answer in the space below, rounded to the nearest whole number.

Idon’t know how to solve this question

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

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.