The one labelled "molecule A".
The coefficient of HCl in the balanced equation is 2. This is because the balanced equation shows that 1 molecule of CaCl2 reacts with 1 molecule of H2CO3 to form 1 molecule of CaCO3 and 2 molecules of HCl.
A substance or molecule that forms in a chemical equation is a product. Products are the result of a chemical reaction between reactants, and they are found on the right side of a chemical equation.
The cell needs oxygen molecule (O2) in the chemical equation of respiration as it acts as the final electron acceptor in the electron transport chain to produce ATP.
The general equation for the hydrolysis of a lipid molecule is: Lipid + water → fatty acid(s) + glycerol
In a condensation synthesis reaction, two molecules combine to form a larger molecule with the release of a small molecule like water. Look for the formation of a larger molecule and the release of small molecules like water, alcohol, or hydrogen gas in the chemical equation to identify condensation synthesis.
The amount of each molecule
The subscript denotes how much of that atom is in the molecule.
The chemical symbol (not equation) of hydrogen is H; the diatomic molecule is H2.
If a molecule has ends with opposite charges, it is usually referred to as a dipole, or polar.
The coefficient of HCl in the balanced equation is 2. This is because the balanced equation shows that 1 molecule of CaCl2 reacts with 1 molecule of H2CO3 to form 1 molecule of CaCO3 and 2 molecules of HCl.
The chemical equation for the reaction between a silicon atom and a chlorine molecule is: Si + Cl2 → SiCl4
The isoelectric point (pI) is the pH at which a molecule has no net charge. To find pI from the Henderson-Hasselbalch equation, set the net charge of the molecule equal to zero and solve for pH. This equation is derived by considering the acidic and basic dissociation constants of the molecule to calculate the pH at which the net charge is zero.
Covalent molecule.
DNA
CO2 is carbon dioxide. You may have got this from a balanced equation. The 6, called a coefficient, in front of the molecule shows how many of the molecule is needed for it to balance out with the rest of the equation.
A substance or molecule that forms in a chemical equation is a product. Products are the result of a chemical reaction between reactants, and they are found on the right side of a chemical equation.
"Ammonium" is not a molecule, and as far as I know doesn't decompose when heated anyway. Heat is generally depicted in chemical equations by a delta-H symbol above the reaction arrow.