(2) gold (4) zinc
In terms of ion charges and chemical change, CuF ha +1 charge and CuF₂ has +2 charge. This is the difference between CuF(s) and CuF2(s).
An atom or molecule with a net electrical charge is known as an ion. Conventionally, the charge of an electron is thought to be negative; this charge is equal to and opposite to the charge of a proton, which is thought to be positive.
As stability depends on the hydration energy of the ions when they connect to the water molecules, Cu2+ is more stable than Cu+. Because the Cu2+ ion makes significantly stronger bonds and has a higher charge density than the Cu+ ion, it releases more energy.
Copper(I) ion is created when copper provides one electron to another atom; this accounts for the +1. Copper has one fewer electron than protons. Copper(II).
Thus, In terms of ion charges and chemical change, CuF ha +1 charge and CuF₂ has +2 charge.
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Answer:
Mass = 76.176 g
Explanation:
Given data:
Mass of lead(II) chloride produced = 62.9 g
Mass of lead(II) nitrate used = ?
Solution:
Chemical equation:
Pb(NO₃)₂ + 2HCl → PbCl₂ + 2HNO₃
Number of moles of lead(II) chloride:
Number of moles = mass/molar mass
Number of moles = 62.9 g/ 278.1 g/mol
Number of moles = 0.23 mol
Now we will compare the moles of lead(II) chloride with Pb(NO₃)₂ from balance chemical equation:
PbCl₂ : Pb(NO₃)₂
1 : 1
0.23 : 0.23
Mass of Pb(NO₃)₂:
Mass = number of moles × molar mass
Mass = 0.23 mol × 331.2 g/mol
Mass = 76.176 g
Answer:
Use the formula v=fλ Divide the velocity by the frequency to find the wavelength. (Make sure you add the unit λ for your final answer)
V: Velocity
F: Frequency
λ: Wavelength