Chemistry developed from alchemy after the 1700s. It was the Alchemist <span>observations and accidental discoveries that brought around modern chemistry.</span>
It's because they add to its hardness . Calcium is naturally dissolved in water
Answer:
Look below
Explanation:
The formula for density is:

Therefore in order to find the density of a solid, you must find the mass and the volume first.
To find the mass, you can use a scale.
To find the volume, you can use the water displacement method. For example, if you fill the water of a graduated cylinder to 10 mL, and then you put a rock inside, and it rises to 15 mL, then the volume (of the rock) is 15mL-10mL=5mL.
Aluminium nitrate is acidic as its made by a weak base with a relatively stronger acid.
Hope that helps ;)
I believe your answer is Plate Tectonics! Hope that helps! :D