Which best represents the reaction of calcium and zinc carbonate (ZnCO3) to form calcium carbonate (CaCO3) and zinc? Ca → ZnCO3
2 answers:
Answer : The correct option is,
Explanation :
Displacement reaction : It is a chemical reaction in which a most reactive element displaces the least reactive element easily from its compound.
In this, A is more reactive element and B is less reactive element.
The given balanced chemical reaction will be,
In this reaction, calcium displace the zinc element easily because calcium is more reactive element than the zinc.
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Answer:
Molar concentration of the weak acid solution is 0.0932
Explanation:
Using the formula:
Where Ca = molarity of acid
Cb = molarity of base = 0.0981 M
Va = volume of acid = 25.0 mL
Vb = volume of base = 23.74 mL
na = mole of acid
nb = mole of base
Since the acid is monopromatic, 1 mole of the acid will require 1 mole of NaOH. Hence, na = nb = 1
Therefore,
Ca = 0.0981 x 23.74/25.0
= 0.093155 M
To 4 significant figure = 0.0932 M
Answer:
Explanation:
Hello,
In this case, for the calculation of the temperature in degree Celsius we subtract 273.15 to the given temperature in kelvins:
Next, by applying the following equation we compute it in degree Fahrenheit:
Clearly, since the initial unit has two significant figures the computed units also show two significant figures.
Regards.