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ch4aika [34]
3 years ago
7

The molar mass of copper is 63.55 g/mol. How many moles of copper were reacted?

Chemistry
2 answers:
Oksana_A [137]3 years ago
8 0
The moles of any substance are equal to the substance's mass divided by its molar mass. Therefore, in order to calculate the moles of copper, you would divide the reacted mass by 63.55
KengaRu [80]3 years ago
5 0

Answer:

c

Explanation:

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Potassium thiocyanate, KSCN, is often used to detect the presence of Fe3+ ions in solution through the formation of the red Fe(H
Natalija [7]

Answer:

Ferric ions left in the solution at equilibrium is 8.0\times 10^{-6} M.

Explanation:

Moles of ferric nitrate in 0.700 L = n

Volume of the solution = V = 0.700 L

Molarity of ferric nitrate = M = 0.00150 M

n=M\times V=0.00150 M\times 0.700 L=0.00105 mol

Moles of potassium thiocyanate in 0.700 L = n'

Volume of the potassium thiocyanate solution = V' = 0.700 L

Molarity of potassium thiocyanate = M' = 0.200 M

n'=M'\times V'=0.200 M\times 0.700 L=0.140 mol

Molarity of ferric ions after mixing :

1 mol of ferric nitrate gives 1 mol of ferric ions.Then 0.00105 mol ferric nitrate will :

Moles of ferric ions = 0.00105 mol

M_1=\frac{0.00105 mol}{0.700 L+0.700 L}=0.00075 M

Molarity of  thiocyanate ions after mixing :

1 mol of potassium thiocyanate gives 1 mol of thiocyanate ions.Then 0.140 mol potassium thiocyanate will give:

Moles of thiocyanate ions = 0.140 mol

M_2=\frac{0.140 mol}{0.700 L+0.700 L}=0.1 M

Complex equation:

          Fe^{3+}+SCN^-\rightleftharpoons [Fe(SCN)]^{2+}

0.00075 M         0.1 M                        0

At equilibrium:

(0.00075 M -x)    (0.1 M-x)                  x

The formation constant of the given complex =K_f=8.9\times 10^2

K_f=\frac{[[Fe(SCN)]^{2+}]}{[[Fe^{3+}]][SCN^{-}]}

8.9\times 10^2=\frac{x}{(0.00075 M -x)\times (0.1 M-x)}

Solving for x:

x = 0.000742 M

Ferric ions left in the solution at equilibrium :

= (0.00075 M -x) = (0.00075 M - 0.000742 M)= 8.0\times 10^{-6} M

5 0
3 years ago
A liquid with high viscosity _____ flow easily and _____ effective in wetting a surface.
scoundrel [369]

A liquid with high  viscosity does not flow easily and is not effective in wetting a surface.

When a metal is subjected to corrosive elements including salt, moisture, and high temperatures, a reaction called corrosion takes place inside the metal. Some foods contain metallic compounds that can corrode a material. The majority of corrosion is simply surface dis-colouration, which polishing agents may quickly remove.

Increasing viscosity and constant intermolecular water bonding together result in surface tension. Any liquid that was more viscous than water possessed a surface tension that was equal to or lower than that of water. Viscosity with surface tension decrease when temperature rises.

Therefore, a liquid with high viscosity does not flow easily and is not effective in wetting a surface.

To know more about viscosity

brainly.com/question/2193315

#SPJ4

5 0
1 year ago
This item is used for small cuts and peeling.
kicyunya [14]
I would say #3 I’m sorry if it’s wrong tho
4 0
3 years ago
Easy Questions! Chemistry - Please help! I give thanks
Evgen [1.6K]
This is not chemistry but

see it is a triangular prim on it's side
V=BH
are of base times height
the base is a triangle
height is 18.5

base=1/2bh
b=8.6
h=8.4
base=1/2(8.6)(8.4)
base=36.12

V=bh
V=36.12*18.5
V=668.22

round
V=668.2 ft^3
8 0
3 years ago
Read 2 more answers
Which determines how atoms combine to form molecules?
arlik [135]
Will be letter E cause all of them can combine molecule
7 0
3 years ago
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