Chemical reaction: BaCl₂ + H₂O₂ → BaO₂ + 2HCl.
Fresh barium chloride does not contain another substances (impurities) like barium chloride stored in container. Hydrogen peroxide is very reactive and with some cations and anions gives oxygen and water instead of peroxide.
Answer:
Dome mountains are formed when hot molten material (magma) rising from the Earth's mantle into the crust that pushes overlying sedimentary rock layers upward to form a “dome” shape.
Explanation:
There are a couple of ways you can think of this. The best way is to understand that when heat is given off to the environment, the conditions within the chemical system have changed. The system itself becomes more random because the energy that kept in place is disappearing with the energy given up to the surroundings.
To picture this statement, imagine you have a cube containing two chemicals that when they react, will make heat. Draw a diagram with nine dots in the upper left corner. The reaction takes place. Now draw another diagram where there are arrows leading away from the cube's face.
Add nine dots all over the face of the cube. That represents an increase in entropy. It becomes more random.
Natalie must complete a large amount of filing this afternoon but agrees to fill in at the front desk for the rest of the afternoon. She demonstrates her <u>Flexibility.</u>
There are more than two! Let's mention some: including experiments and observations into the study, having a control condition, closely following the devised procedure, having a hypothesis, etc...