.War nickels, produced from 1942-1945 are composed of 56% copper, 35% silver

.War nickels, produced from 1942-1945 are composed of 56% copper, 35% silver and 9% manganese. How many moles of each element are found in a 5.00 g nickel coin?

2 months ago

Solution 1

Guest Guest #10917
2 months ago
The moles  of each element  found in a 5.00 g nickel coin is calculated as below

moles =mass/molar mass

calculate the mass of each element  =% composition of element/100 x total mass of  nickel

Mn = 9/100 x5 = 0.45g
Cu=56/100 x5= 2.8 g
Ag= 35/100x5=  1.75 g
moles of each element is therefore=
Mn = 0.45g/54.94 =  8.19 x10^-3 moles

Ag=1.75g/107.87 g/mol = 0.0162 moles

Cu = 2.8 g/63.5 g/mol=0.0441  moles

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The correct option is C which is it is the third coordinate because p and q both are negative.


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The number of atoms  present in 0.10 mol of PtCl2(NH3) is calculated using Avogadro law  formula

that is

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what about 0.10 moles = ? atoms

= 6..02 x10 ^23 x 0.1 = 6.02 x10^22  atoms
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According to the mole concept, 1 mole of an atom contains 6.022 \times 10^{23} atoms or molecules.

Therefore, we can calculate the number of atoms present in 0.10 mol of PtCl_{2}(NH_{3})_{2} as follows.

               0.10 mol \times 6.022 \times 10^{23} atoms

                   = 0.6022 \times 10^{23}

                   = 6.022 \times 10^{22}

Therefore, we can conclude that there are 6.022 \times 10^{22} atoms present in 0.10 mol of PtCl_{2}(NH_{3})_{2}.

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Answer is: an alpha particle.

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Following three things when applied could make the reaction to occur more quickly;

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The things that can be done to make the reaction occur quickly include increasing the temperature, grinding calcite, and using catalyst.

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  • Furthermore, it should be noted that grinding calcite results in the rise in the surface area of the calcite. Therefore, the formation of product will rise.

In conclusion, these are important in making hydrochloric acid react with the mineral calcite quickly.

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One example of a solution is salt water which is a mixture of water and salt. You cannot see the salt and the salt and water will stay a solution if left alone. Parts of aSolution. Solute - The solute is the substance that is being dissolved by another substance.
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