For a reaction to occur, the reactants must have enough energy to overcome a barrier so as to reach the transition state and consequently form products (Fig. 1). The reactants all possess ...

When substances react to form new substances as products, the mass of the products is the same as the mass of the reactants. NGSS 5-PS1-2: Measure and graph quantities to provide evidence that ...

The atom economy of a chemical reaction is a measure of the percentage of reactants that become useful products. Inefficient, wasteful processes have low atom economies. Efficient processes have ...

The combustion of methane is an example of an exothermic reaction. More energy is released when the bonds in the products are formed than is used to break the bonds of the reactants. This is shown by ...

The activation energy barrier separates reactants from products. The top of the barrier is the transition state. Putting the right amount of energy into the reaction allows the reactants to surmount ...

Available catalysts can be homogeneous, which means that they possess the same phase as the reactants and products, making ...

As one mole of every gas will occupy the same volume at a given temperature and pressure, we can use volumes and the molar ratio to calculate volumes of reactants or products. Consider the ...