When 13.0 g of acetylene, C2H2, undergoes complete combustion, 65.5 kJ of heat are released. a) How much energy is released when one mole of acetylene is burned?

b) Write a balanced chemical equation for the reaction and include the heat value in the equation.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull

Draw the lewis dot structure for each of the following polyatomic ions