Answer:
B. Cl₂ + NaBr → NaCl + Br₂
Explanation:
The single replacement chemical equation that is <u>unbalanced</u> is Cl₂ + NaBr → NaCl + Br₂.
A look at the equation and you will discover that the chlorine on the reactant side is not balanced with the one on the product side. The chlorine at the reactant side has 2 atoms of chlorine but just 1 atom of chlorine in the product side. Therefore, it is unbalanced. Also, you will discover that the bromine on the reactant side is not balanced with the one at the product side. The bromine on the reactant side has 1 atom of bromine while at the product side, it has 2 atoms. Therefore, it is unbalanced.
For a chemical equation to be balanced, the number of atoms and molecules at the reactant side must be equal to the number of atoms and molecules at the product side. A single replacement reaction takes place whenever there is a replacement of one element by another element in a compound during a chemical reaction.
Answer:
The median level in the water is 7ppm
Explanation:
LoB is assessed by calculating duplicates of a blank sample and evaluating the mean result and the standard deviation (SD). After evaluating this value LOD can be evaluated conferring to LOD=LOB+1.645(SD low concentration sample ). The quantitation limit can also be got from accuracy studies. LOD's may also be evaluated based on the standard deviation of the response (Sy) of the curve and the slope of the calibration curve (S) at levels resembling the LOD according to the formula: LOD = 3.3
Answer: A solution is made by dissolving 27.8 g of nicotine (Molar Mass = 160 g/mol) in 145 g of cyclohexane (C6H12) to form 142 mL of solution. Calculate the mole fraction of the solute and the molarity, respectively, of this solution.
Explanation:
My answer -
hydrogen acceptor any substance ( CYTOCHROME OXIDASE) that can become reduced by the addition of hydrogen, thus enabling the transfer and release of energy as in the ELECTRON TRANSPORT SYSTEM.
P.S
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For the equation to be balanced, the Atom's coefficient on the left side and the right side of the equation has to be equal
so, the answer would be :
Br2 + S2032- + 5H20 -- > BR2- + 2S02- + H+
Hope this helps