2 Points
How is heat included in the equation of an exothermic reaction?
O
A. Heat is written as a reactant in the reaction.
O
B. Heat is written as a product of the reaction.
O
C: Heat is added as a subscript in the reaction.
D. Heat is written over the arrow in the reaction.
SUBMIT

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.