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Hope this helps :)</span>
Answer:
CH3COOH would be more concentrated
Explanation:
The higher the concentration value, the more concentrated it is.
The relationship between concentration, moles and volume is given by the equation;
Concentration = No of moles / Volume
5.0 grams of HCOOH dissolved in 189 mL of water
Number of moles = Mass / Molar mass = 5 / 46.03 = 0.1086 mol
Concentration = 0.1086 / 0.189 = 0.5746 mol/L
1.5 moles of CH3COOH dissolved in twice as much water
Volume = 2 * 189 = 378 ml = 0.378 L
Concentration = 1.5 / 0.378 = 3.9683 mol/L
Comparing both concentration values;
CH3COOH would be more concentrated
(20/23) times 100 is 87%
now the answer asks for percentage ERROR
100-87 =13
so answer is C
Answer is 38/3 or 12.67
3x=38
x=38/3
therefore answer is the one mentioned above
Given :
A chemical equation :
To Find :
What is the type of reaction :
A. Single replacement
B. Decomposition
C. Double replacement
Solution :
We know when a single compound turns into two or more compounds or element, this type of reaction is said to be decomposition reaction.
In the given equation 
decomposes into 
and 
.
Therefore, the given reaction is decomposition reaction.
