In the gaseous state, the molecules are spread very widely apart from one another and are free to move about. If placed in a container, the molecules will occupy the volume of the container and take its shape as well.
The molecules in the liquid state are closer than in the gaseous state and less free to move about. They are in layers that slide over one another, allowing the substance to flow. If placed in a container, the liquid water will take its shape but not the volume.
The molecules in the solid state are fixed in position, only able to vibrate about their fixed points. The structure formed is rigid, it does not flow and its shape and volume are fixed.
Answer:
the answer is 102- i took did it on edg
Explanation:
Answer:
an endothermic reaction
Explanation:
An endothermic reaction has occurred.
Answer:
Making oxygen
Oxygen can be made from hydrogen peroxide, which decomposes slowly to form water and oxygen:
hydrogen peroxide → water + oxygen
2H2O2(aq) → 2H2O(l) + O2(g)
The rate of reaction can be increased using a catalyst, manganese(IV) oxide. When manganese(IV) oxide is added to hydrogen peroxide, bubbles of oxygen are given off.
Apparatus arranged to measure the volume of gas in a reaction. Reaction mixture is in a flask and gas travels out through a pipe in the top and down into a trough of water. It then bubbles up through a beehive shelf into an upturned glass jar filled with water. The gas collects at the top of the jar, forcing water out into the trough below.
To make oxygen in the laboratory, hydrogen peroxide is poured into a conical flask containing some manganese(IV) oxide. The gas produced is collected in an upside-down gas jar filled with water. As the oxygen collects in the top of the gas jar, it pushes the water out.
Instead of the gas jar and water bath, a gas syringe could be used to collect the oxygen.
