<span>Symbol- Cr
Oxidation States: 6, 3, 2, 0
Chromium is unstable in oxygen, it immediately produces a thin oxide layer that is impermeable to oxygen and protects the metal below. </span>
Answer:
19.3g/cm^3
Explanation:
Hey,
the formula for density is Mass/Volume so in this question you basically put the given things in the formula
D = M/V
D= 944.75/48.9
D= 19.3g/cm^3
The method used to separate oxygen from mercury oxide is by strong heating. In the lab mercury oxide is placed in strong glass test tube and strong heat applied to the test tube. Mercury oxide then undergoes a decomposition reaction to produce mecury and oxygen.
Antoine Lavoisier , the father of modern chemistry is the one credited as having proved the decomposition of mercuric oxide by heating, and that the result was production of mercury and oxygen.
A decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances.
An electron is a negative particle, so the answer is -1
SI unit- Quantity
second- time
kilogram- mass
kelvin- temperature
ampere- electric current
S.I. Unit of time is second.
S.I. Unit of mass is kilogram.
S.I. Unit of temperature is kelvin.
S.I. Unit of electric current is ampere.
So match will be as follows:
second- time
kilogram- mass
kelvin- temperature
ampere- electric current
