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LenaWriter [7]
3 years ago
6

How can one tell how much of each reactant will be used in a reaction?

Chemistry
1 answer:
Ostrovityanka [42]3 years ago
5 0
To Tell how much of each reactant will be used in a reaction, we need to find which reactant is the Limiting Reagent.
All the reactants will be consumed in equal amount as that of L.R.
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The atomic mass of Cu is 63.5. Find its electrochemical equivalent​
FrozenT [24]

Answer:

The electrochemical equivalent of copper, Cu, is 3.29015544 × 10⁻⁷ g/C

Explanation:

The given parameters are;

The element for which the electrochemical equivalent is sought = Copper

The atomic mass of copper = 63.5

The electrochemical equivalent, 'Z', of an element or a substance is the mass, 'm', of the element or substance deposited by one coulomb of electricity, which is equivalent to a 1 ampere current flowing for a period of 1 second

Mathematically, we have;

m = Z·I·t = Z·Q

We have;

Cu²⁺ (aq) + 2·e⁻ → Cu

Therefore, one mole of Cu, is deposited by 2 moles of electrons

The charge carried one mole of electrons = 1 Faraday = 96500 C

∴ The charge carried two moles of electrons, Q = 2 × 96500 C = 193,000 C

Given that the mass of an atom of Cu = 63.5 a.m.u., the mass of one mole of Cu, m = 63.5 g

Z = \dfrac{m}{Q} = \dfrac{63.5 \ g}{193,000 \ C} = 3.29015544 \times 10^{-4} \, g \cdot C^{-1}

∴ Z = 3.29015544 × 10⁻⁴ g/C = 3.29015544 × 10⁻⁷ g/C

The electrochemical equivalent of copper, Cu, is Z = 3.29015544 × 10⁻⁷ g/C

7 0
3 years ago
What are all the elements to the left of the zigzag line in a periodic table called?
Kitty [74]
They are called metals
4 0
3 years ago
A reaction rate assay measures enzyme _______________; and a colorimetric endpoint assay measures ________________.
VMariaS [17]

Answer:

The correct option is: A. activity; concentration

Explanation:

A reaction rate essay is a laboratory method to determine the activity of an enzyme. It is necessary for determining the enzyme kinetics and inhibition.

Whereas, a colorimetric analysis is a method to determine the concentration of a chemical compound in a solution. Therefore, a colorimetric endpoint assay measures the concentration.

Therefore, Enzyme activity is measured by a reaction rate assay and the concentration is measured by a colorimetric endpoint assay.

4 0
3 years ago
Read 2 more answers
The standard cell potential (Eºcell) for the reaction below is +0.63 V. The cell potential
Likurg_2 [28]

Answer:

63.5 w isvthebanswerok is th answer

3 0
2 years ago
What is the mole fraction of ethanol in a mixture of 0.25 mol of ethanol and 0.4 mol of methanol? Report your answer to the hund
snow_tiger [21]

Answer:

0.3846

Explanation:

i used fractions

6 0
3 years ago
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