Answer:so that they may not get confused in which container did they place which chemical since some chemicals are simmilar in colour
Explanation:
D
This feature is formed at destructive boundaries where the denser plate (usually the oceanic plate) is subducted underneath the less dense plate (usually the continental plate).
Explanation:
the stress in the boundary between the two plates causes them to warp at the boundary forming a trench. This forced bending and the friction between the two plates (remember tectonic plates are very rugged) causes fissures to develop at the boundary. As the denser plate dives into the mantle, it begins to melt and the molten rock rises through the fissures. The magma erupts at the surface in several fissures forming volcanic mountains ranges along the convergent boundary.
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Answer:
The chemical formula of this residue: 
Explanation:
Mass of residue = 19.12
Let the formula of the residue be 
Moles of residue: n
Moles of sodium chromate = n'
Molarity of sodium chromate = 0.1035 M
Volume of sodium chromate solution = 540.0 mL = 0.540 L
1 mL = 0.001 L
According to reaction,1 mole of 
gives 1 mole of
So, n = n'
x = 10
The chemical formula of this residue:
The general formula for the alkenes is C nH 2n
Concepts to understand before solving:
-Oxygen is ALWAYS reduced
-OIL- Oxidation Is Loss of electrons
-RIG- Reduction Is Gain of electrons
-the element that is oxidized is the reducing agent
-the element that is reduced is the oxidizing agent
A. 2H2 + O2 —> 2H2O
O is reduced, making it the oxidizing agent
H is oxidized, making it the reducing agent
B. 2KNO3 —> 2KNO2 + O2
O is reduced, making it the oxidizing agent
KNO is oxidized, making it the reducing agent
