Since sodium chloride contains both a metal AND a nonmetal, the combination of those would result in an ionic bond.
Answer:
Obsidian is not a mineral as the atoms or molecules in obsidian do not have a crystalline structure.
Explanation:
Obsidian originates naturally and is formed by igneous rock.
When felsic larva comes out from the volcano,it rapidly cools down and thus form obsidian.It is pure black in color but some times color differ due to presence of some impurities.
It is brittle,but hard.It is not a mineral and is called as mineraloids and is not found in crystalline form,.
The main constituent is SiO2.
It is found in the margin of rhyolitic lava.
The "A)The water is part of the system" statement is true in the coffee-cup calorimeter used in the laboratory. The calorimeter is the device used for measuring the amount of the heat flow of a chemical reaction. The coffee-cup calorimeter is one of the most common types of calorimeter which has the water as a part of its system<span>.</span>
An aquifer is a permeable rock which can contain or transfer water.
