In [cu(nh3)4]co3, how many 3d electrons does copper have?

1 answer:

4 0

Copper has a total of 29 electrons which would place the atom on the 29th number in the periodic table. In [Cu(NH₃)₄], there are 9 3d electrons of copper. The electron configuration of copper is [Ar] 4s² 3d¹⁰ but since there is a sub shell of its figuration that indicates only 1 electron filled, and since it is in the law that an electron must be paired up with another electron no matter how completely filled is the last sub shell, that is why the ast electron was given up to the other sub shell making it 9. The d shell can occupy around 10 electrons so it means that copper is a stable atom in the 3d sub shell. When you add [Cr(H₂O)₆]³⁺ (aq) and NH₃ (aq) a green solution because both are aqueous in form, you will get a purple solution containing [Cr(NH₃)₆]³⁺ (aq) and H₂O (l).

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Hey I have a chemistry problem pls tell me how do you find the percentage thx...

Julli [10]

Answer:

88.24

Explanation:

find the total mass of the compound using there RAM which has been give then the mass of caborn

4 0

4 years ago

What mass of H2O is produced by the combustion of 1.00 mol of CH4?

kkurt [141]

CH4 : H2O
1 : 2

number of moles of H2O = 1.00 x 2
number of moles of H2O = 2.00mol

mass = number of moles x molar mass

mass of H2O = 2.00 x (1 + 1 + 16)
mass of H2O = 36g

8 0

3 years ago

The burning of magnesium is a highly exothermic reaction. How many kilojoules of heat are released when 0. 75 mol of Mg burn in

alexandr402 [8]

Taking into account the definition of enthalpy of a chemical reaction, the quantity of heat released when 0.75 moles of Mg are burned is 451.5 kJ.

<h3>Enthalpy of a chemical reaction</h3>

The enthalpy of a chemical reaction is known as the heat absorbed or released in a chemical reaction when it occurs at constant pressure. That is, the heat of reaction is the energy that is released or absorbed when chemicals are transformed into a chemical reaction.

The enthalpy is an extensive property, that is, it depends on the amount of matter present.

<h3>Heat released in this case</h3>

In this case, the balanced reaction is:

2 Mg(s) + O₂ (g) → 2 MgO(s) + 1204 kJ

This equation indicates that when 2 moles of Mg reacts with 1 mole of O₂, 1204 kJ of heat is released.

When 0.75 moles of Mg are burned, then you can apply the following rule of three: if 2 moles of Mg releases 1204 kJ of heat, 0.75 moles of Mg releases how much heat?

$heat=\frac{0.75 moles of Mgx1204 kJ}{2 moles of Mg}$