Iodine is I2 (subscript)
Iodide ion is I-
I hope this will help you
Answer:
D.) the density changed
Explanation:
This would be the answer because it is a specific amount of Nitrogen undergoing a physical change. Since the color and boiling point don't influence a change in volume, those are ruled out. Also, nitrogen's molecular mass never changes, so that would not make sense either. But if the density, which is mass/volume, has changed (more specifically decreases) then it means the volume has increased.
Hope this helps.
Answer:
Rock
Explanation:
A rock is a solid mixture of one or more minerals and organic matter. Rock is often defined as an aggregate of minerals.
Minerals are solids that are made up of inorganic materials with a definite composition and a well ordered arrangement.
- Rocks are usually classified based on their mode of formation.
- They are often grouped as igneous, metamorphic and sedimentary.
Answer:
79.89%
Explanation:
Copper has a molar mass of 63.55
Oxygen has a molar mass of 16.00
If you add these you get 79.55
To get the mass percent of copper divide copper by the whole. 63.55/79.55*100= 79.89%
