What is mean by scientific approach in chemistry
brief it

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.

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate

If two identical atoms are bonded,what kind of molecule is formed