An atom of element x has an atomic mass of about 40; after reacting with a second atom of x, a different element (called y) with an atomic mass of 80 is produced. what type of reaction is this?
a. fusion
b. fission
c. combustion
d. synthesis

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Which proportionality applies to avogadro’s law?