Mass of copper : 0.165 g
<h3>Further explanation</h3>
Given
5.0 A over 100 seconds
Required
Mass of copper
Solution
Faraday's law:
<em>The mass of the substance formed at each electrode is proportional to the electric current flowing in the electrolysis</em>
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e = Ar / valence = eqivalent weight
i = current
t = time
W = weight
CuSO₄ ----> Cu²⁺ + SO₄²⁻
Cu ----> Cu²⁺ + 2e
e = Ar/2
= 63,5/2 = 31,75
Answer The simplest form of an exchange reaction might be: A + BC → AB + C. Notice that, to produce these products, B and C had to break apart in a decomposition reaction, whereas A and B had to bond in a synthesis reaction. A more complex exchange reaction might be: AB + CD → AC + BD.
Explanation:
Answer:the answer is d
Explanation:because the graph shows that that the average temperature is 53 so it only makes sense that the answer is (D)
You need to use the electron configuration, which you can do from the atomic number or search in a book or Internet.
The atomic number of Ga is 31 and its electron configuration is:
[Ar] 3d10 4s2 4p1 .... (the numbers to the right of the letters d, s and p are superscripts)
Every electron occupies the lowest energy level available, so the last electron, which is 4p1, is in the highest enery level.
The number 4 indicates the shell, and the letter p is the subshell.
Answer: subshell 4p
Answer:
196 gdm-3
Explanation:
There are two major units of concentration, moldm-3 and gdm-3. The first unit refers to molar concentration while the second unit refers to mass concentration. Both units are useful in chemistry when describing the concentration of solutions as deemed expedient in each particular case.
Here we are required to compute the mass concentration from the molar concentration. We must recall that; mass concentration= molar concentration × molar mass
Let us first obtain the molar mass of H2SO4 from the relative atomic masses given=
2(1) + 32 + 4(16) = 98 gmol-1
Molar concentration of H2SO4 = 2 moldm-3
Mass concentration= 2 moldm-3 × 98 gmol-1
Mass concentration = 196 gdm-3
