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madreJ [45]
3 years ago
12

Help please will mark brainliest!!

Chemistry
1 answer:
LiRa [457]3 years ago
3 0

Answer:

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The ion MnOis often used to analyze for the Fe2+ content of an aqueous solution by using the (unbalanced) reaction Mno+Fe2+ + Fe
dusya [7]

Answer:

B) 0.230 M

Explanation:

The first step is to <u>balance the reaction</u> between the Ferrous ion and the permanganate ion:

5~Fe^+^2~+~MnO_4^-^1~+~8H^+~->~5Fe^+^3~+~Mn^+^2~+4H_2O

Then we have to <u>calculate the moles</u> of MnO_4^-:

M~=~\frac{mol}{L}

mol~=~M*L

mol~=~0.033~M*0.0633L=~0.002088~mol~MnO_4^-

Then using the <u>molar ratio</u> we can find the moles of Fe^+^2:

0.002088~mol~MnO_4^-\frac{5~mol~Fe^+^2}{1~mol~MnO_4^-}=0.01044~mol~Fe^+^2

Finally we can calculate the molarity:

M=\frac{0.01044~mol~Fe^+^2}{0.0455~L}=0.230~M

5 0
3 years ago
Construct a food chain (with at least 3 organisms) based on what you discovered in your owl pellet. Use your prior knowledge of
ozzi

Answer:

the tertiary animals the bigger animals that feed on smaller fish and crustaceans. These include predators like sharks, barracuda and tuna snapper. these fish that are commercially fished at unsustainable levels.

Explanation:

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2 years ago
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Does the number of electrons reaching the detector increase or decrease as you change the frequency?
velikii [3]
If you increase the frequency, the photon will have more energy and can therefore transfer more electrons to the other side. As such, you will have an increased current.
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2 years ago
Why cant h2o delirious marry me
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What do you mean is that a school question
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Perform the following unit conversions:
Y_Kistochka [10]

Answer :

(a) The 60 feet of water is equal to 179344.2 Pa.

(b) The 220 psi is equal to 31680lbf/ft^2

(c) The 120 torr is equal to 15998.6 Pa.

(d) The 1.0 atm to inches of glycerin  is equal to 323.07 inches.

(e) The 1050 mm Hg is equal to 376.95lbf/ft^2

Explanation :

(a) The conversion used from feet to pascal is:

1\text{ feet}=2989.07Pa

As we are given that 60 feet of water. Now we have to convert into Pa.

As, 1\text{ feet}=2989.07Pa

So, 60\text{ feet}=\frac{60\text{ feet}}{1\text{ feet}}\times 2989.07Pa=179344.2Pa

The 60 feet of water is equal to 179344.2 Pa.

(b) The conversion used from psi to lbf/ft^2 is:

1\text{ psi}=144lbf/ft^2

As we are given that 220 psi. Now we have to convert into lbf/ft^2.

As, 1\text{ psi}=144lbf/ft^2

So, 220\text{ psi}=\frac{220\text{ psi}}{1\text{ psi}}\times 144lbf/ft^2=31680lbf/ft^2

The 220 psi is equal to 31680lbf/ft^2

(c) The conversion used from torr to pascal is:

1\text{ torr}=133.322Pa

As we are given that 120 torr. Now we have to convert into Pa.

As, 1\text{ torr}=133.322Pa

So, 120\text{ torr}=\frac{120\text{ torr}}{1\text{ torr}}\times 133.322Pa=15998.6Pa

The 120 torr is equal to 15998.6 Pa.

(d) 1.0 atm to inches of glycerin

Formula used : P=\rho gh

where,

P = pressure of glycerin = 1.0 atm = 101325 Pa

g = acceleration due to gravity = 9.8m/s^2

\rho = density of glycerin = 1260kg/m^3

Now put all the given values in above formula, we get:

101325Pa=(1260kg/m^3)\times (9.8m/s^2)\times h

h=8.206\frac{Pa.m^2s^2}{kg}=8.206m=323.07\text{ inches}

Conversion used :

1Pa=\frac{kg}{ms^2}\\\\1m=39.37inches

The 1.0 atm to inches of glycerin  is equal to 323.07 inches.

(e) The conversion used from psi to lbf/ft^2 is:

1\text{ mmHg}=0.359lbf/ft^2

As we are given that 1050 mmHg. Now we have to convert into lbf/ft^2.

As, 1\text{ mmHg}=0.359lbf/ft^2

So, 1050\text{ mmHg}=\frac{1050\text{ mmHg}}{1\text{ mmHg}}\times 0.359lbf/ft^2=376.95lbf/ft^2

The 1050 mm Hg is equal to 376.95lbf/ft^2

4 0
3 years ago
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