How can molecules with polar bonds be nonpolar?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Based on its chemical properties, identify the position of each chemical family on the periodic table.

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth