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Ksivusya [100]
2 years ago
11

Water has a formula of H2O. Based on the formula which is NOT a correct statement?

Chemistry
2 answers:
Sindrei [870]2 years ago
8 0

Answer:

A.water is a molecule

Explanation:

water is a molecule not a element

ELEN [110]2 years ago
3 0
Answer: A. It is an element.

Explanation: An element cannot be broken down into simpler substances. For example, oxygen and hydrogen are elements.
A compound is two or more elements joined by electrons. Water is a compound.
The formula for water is H2O, which can be read as “two hydrogen atoms and one oxygen atoms.” Therefore, water contains both oxygen and hydrogen.
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Answer: Equilibrium concentration of [Cl^-] at 50^0C is 4.538 M

Explanation:

Initial concentration of CoCl_2 = 0.056 M

Initial concentration of Cl^- = 4.60 M

The given balanced equilibrium reaction is,

               COCl_2+2Cl^-\rightleftharpoons [CoCl_4]^{2-}+6H_2O

Initial conc.          0.056 M      4.60 M        0 M       0 M

At eqm. conc.     (0.056-x) M   (4.60-2x) M   (x) M    (6x) M

The expression for equilibrium constant for this reaction will be,

K_c=\frac{[CoCl_4]^{2-}\times [H_2O]^6}{[CoCl_2]^2\times [Cl^-]^2}

Given : equilibrium concentration of [CoCl_4]^{2-} =x =  0.031 M

Concentration of Cl^- = (4.60-2x) M  = (4.60-2\times 0.031) =4.538 M  

Thus equilibrium concentration of [Cl^-] at 50^0C is 4.538 M

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How was potassium discovered?​
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Answer:

Potassium was the first metal to be isolated by electrolysis. It was discovered by the  English chemist Sir Humphry Davy by decomposing molten potassium hydroxide (KOH) with a voltaic battery.

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