You need the oxidation number for Cl, so we will use only the ClO3 1-.
<span>Oxygen is not in a peroxide. It is in "chlorate" so the oxidation number of oxygen is 2-. There are 3 oxygens in the ion. 2- x 3 = 6- total. The chlorate ion has a 1- charge so there are 5- charges to be balanced out by positive charges. That means that the Cl (the only other atom there) has to balance out the 5- left over by having a 5 + oxidation number. </span>
<span>(Cl 5-) + (O3 6-) = ClO3 1-
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Answer:
7.05 × 10⁻²² nm
Explanation:
Step 1: Given and required data
- Energy evolved when a mole of electrons changes between the 2 levels (E): 282 kJ
- Planck's constant (h): 6.63 × 10⁻³⁴ J.s
- Speed of light (c): 3.00 × 10⁸ m/s
Step 2: Calculate the wavelength (λ) of the light evolved
We will use Planck-Einstein's relation.
E = h × c/λ
λ = h × c/E
λ = (6.63 × 10⁻³⁴ J.s) × (3.00 × 10⁸ m/s)/(282 × 10³ J) = 7.05 × 10⁻³¹ m
We will convert λ to nm using the conversion factor 1 m = 10⁹ nm.
7.05 × 10⁻³¹ m × 10⁹ nm/1 m = 7.05 × 10⁻²² nm
Answer: acid react with metals to form H2.
Explanation: metals which are more electropositve than hydrogen will always displaced hydrogen from acids. The equation below show how hydrogen is displaced from acid
Zn + 2HCl -—> ZnCl2 + H2
10 molecules. Water molecules have 10 electrons and 10 protons. (8 from the oxygen atom and 1 from each of the 2 hydrogen atoms.)
The answer would be c)centimeter, second, inch :)