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3 years ago

What volume of carbon monoxide gas at STP reacts to produce 759 g of iron?

1 answer:

6 0

The volume of Carbon Monoxide gas at STP reacts to produce 759 g of Iron is 458 L.

If this is the Given: $Fe_{2} O_{3} + CO$ >>> $Fe+ CO_{2}$

Then the first step is to balance it:
$2 Fe_{2} O_{3} + 6 CO$ >>> $4 Fe+ 6 CO_{2}$
Afterwards, we convert 759 g of Iron to moles of Carbon Monoxide (CO).
$759 g Fe * \frac{1 mol Fe}{55.65g Fe} * \frac{6 mol CO}{4 mol Fe} = 20.45822102 mol CO$
Lastly, we find the volume of carbon monoxide gas at STP, where one mole of gas occupies 22.4 Liters.
$20.45822102 mol CO * \frac{22.4 L of CO}{1 mol CO} = 458.2641509 L of CO$
Since there are only 3 significant figures, so we round the answer to 458 L.

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A voltaic cell that uses the reaction PdCl2−4(aq)+Cd(s)→Pd(s)+4Cl−(aq)+Cd2+(aq) has a measured standard cell potential of +1.03

Ghella [55]

Answer : The balanced two-half reactions will be,

Oxidation half reaction : $Cd(s)\rightarrow Cd^{2+}(aq)+2e^-$

Reduction half reaction : $Pd^{2+}(aq)+2e^-\rightarrow Pd(s)$

Explanation :

Voltaic cell : It is defined as a device which is used for the conversion of the chemical energy produces in a redox reaction into the electrical energy. It is also known as the galvanic cell or electrochemical cell.

In the voltaic cell, the oxidation occurs at an anode which is a negative electrode and the reduction occurs at the cathode which is a positive electrode.

The given redox reaction is:

$PdCl_4^{2-}(aq)+Cd(s)\rightarrow Pd(s)+4Cl^-(aq)+Cd^{2+}(aq)$

The balanced two-half reactions will be,

Oxidation half reaction : $Cd(s)\rightarrow Cd^{2+}(aq)+2e^-$

Reduction half reaction : $Pd^{2+}(aq)+2e^-\rightarrow Pd(s)$

7 0

3 years ago

If I use 4 N of force to push an object 3 m, how much work have I done? A)3J B)4N C)12J

artcher [175]

Work done by me for using force of 4 N to push an object 3 m away is 12 J.

Explanation:

Work done on any object is defined as the force required to displace that object from its original position. In other terms, the work done is the measure of force utilized for moving an object. So mathematically it is represented as the product of force with the displacement of the object due to that force.

$Work Done = Force \times Displacement$

Then, here it is given that force of about 4 N is used to displace the object to 3m. Thus,

$\text { Work Done }=4 \times 3=12 \mathrm{J}$

So, 12 J of work is done by me to push an object 3 m away with the force of 4 N.

8 0

3 years ago

Water (2150 gg ) is heated until it just begins to boil. If the water absorbs 5.91×105 JJ of heat in the process, what was the i

Serjik [45]

Answer:

Initial temperature of water was 34,3°C

Explanation:

The heat absorbed in the process (Q) can be written as:

Q = mcΔT

Where the heat is 5,91x10⁵J, m is mass of water (2150g), c is specific heat of water (4,184J/g°C). And ΔT is change in temperature (100°C - x). Replacing:

5,91x10⁵J = 2150g×4,184J/g°C×(100°C - x)

5,91x10⁵J = 899560J - 8995,6J/°Cx

-3,0856x10⁵J = - 8995,6J/°Cx

34,3°C = x

Thus, initial temperature of water was 34,3°C

I hope it helps!

3 0

3 years ago

Which corresponds to a pressure of 1.23 atm??

Vadim26 [7]

Atmospheric pressure, sometimes also called barometric pressure, is the pressure exerted by the weight of air in the atmosphere of Earth (or that of another planet)

1 atm is equivalent to = 101325 Pa

= 760 mmHg

= 760 torr

= 1.01325 bar

So 1.23 atm is equal to

= 124629.8 Pa

= 934.8 mmHg

= 934.8 torr

= 1.2462 bar

6 0

3 years ago

The kinetics of the reaction below were studied and it was determined that the reaction rate increased by a factor of 9 when the

Annette [7]

Answer:

C) second

Explanation:

According to the law of mass action:-

The rate of the reaction is directly proportional to the active concentration of the reactant which each are raised to the experimentally determined coefficients which are known as orders. The rate is determined by the slowest step in the reaction mechanics.

Order of in the mass action law is the coefficient which is raised to the active concentration of the reactants. It is experimentally determined and can be zero, positive negative or fractional.

The order of the whole reaction is the sum of the order of each reactant which is raised to its power in the rate law.

The reaction rate increased by 9 times when the concentration of B is tripled it means that:-

R = [B]²

[B'] = 3[B]

R' = (3[B])² = 9[B]² = 9 R

The order is 2.

5 0

3 years ago