Answer:
it's atomic number is 5 and total number is 10
Answer:
The concentration of NO₂ is 0,0230M
Explanation:
The equilibrium constant, kc, express the ratio in equilibrium between products and reactants. For the reaction:
N₂O₄(g) ⇄ 2NO₂ (g) <em>kc = 0.211 at 100°C</em>
kc = ![\frac{[NO_{2}]^2}{[N_{2}O_{4}]}](https://tex.z-dn.net/?f=%5Cfrac%7B%5BNO_%7B2%7D%5D%5E2%7D%7B%5BN_%7B2%7DO_%7B4%7D%5D%7D)
In equilibrium:
0,211 = ![\frac{[NO_{2}]^2}{[0,00251]}](https://tex.z-dn.net/?f=%5Cfrac%7B%5BNO_%7B2%7D%5D%5E2%7D%7B%5B0%2C00251%5D%7D)
5,2961x10⁻⁴ = [NO₂]²
<em>0,0230 M = [NO₂]</em>
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I hope it helps
Answer:
A. life forms existed during the Cambrian period
Explanation:
The concentration in weight percent when 6 g of sugar is mixed with 9 g of water is 40%.
There are several ways to denote the concentration of a solution like
- Molarity
- Molality
- Mass percent
- Mole Fraction
The formula for calculating mass percent is as follows
Mass per cent = (Mass of solute/Mass of solute + Mass of solvent) x 100%
In the given situation sugar is the solute and water is the solvent.
Putting the given values in the above formula
Mass per cent = (6/6+9) x 100%= 6/15 x 100% = 40%
Hence, the concentration in weight percent when 6 g of sugar is mixed with 9 g of water is 40%.
To know more about "concentration of a solution", refer to the link given below:
brainly.com/question/26579666?referrer=searchResults
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