Thermal decomposition of alkane is called pyrolysis or cracking?

What was bohr’s contribution to the planetary model

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.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false