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2 years ago

Please answer all of the questions

Chemistry

1 answer:

anzhelika [568]2 years ago

3 0

Here's your ans

Explanation:

1-1.50

2-d

3-c

4-b

5-d

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What is the molar mass of magnesium and atomic oxygen?

bagirrra123 [75]

Mg = 24.305 g/mol
O = 15.9994 g/mol

7 0

3 years ago

A simple equation relates the standard free‑energy change, ΔG∘′, to the change in reduction potential. ΔE0′. ΔG∘′ = −nFΔE0′ The

MA_775_DIABLO [31]

Answer : The value of standard free energy is, -152.4 kJ/mol

Explanation :

The given balanced cell reaction is:

$FADH_2+\frac{1}{2}O_2\rightarrow FAD+H_2O$

The half reaction will be:

Reaction at anode (oxidation) : $FADH_2\rightarrow FAD+2H^++2e^-$ $E^0_{Anode}=+0.03V$

Reaction at cathode (reduction) : $\frac{1}{2}O_2+2H^++2e^-\rightarrow H_2O$ $E^0_{Cathode}=+0.82V$

First we have to calculate the standard electrode potential of the cell.

$E^o=E^o_{cathode}-E^o_{anode}$

$E^o=(+0.82V)-(+0.03V)=+0.79V$

Relationship between standard Gibbs free energy and standard electrode potential follows:

$\Delta G^o=-nFE^o_{cell}$

where,

$\Delta G^o$ = standard free energy = ?

n = number of electrons transferred = 2

F = Faraday constant = $96.48kJ.mol^{-1}V^{-1}$

$E^o_{cell}$ = standard electrode potential of the cell = 0.79 V

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

$\Delta G^o=-(2)\times (96.48kJ.mol^{-1}V^{-1})\times (0.79V)$

$\Delta G^o=-152.4kJ/mol$

Therefore, the value of standard free energy is, -152.4 kJ/mol

8 0

3 years ago

Oxygen is composed of only one kind of atom and can’t be separated into simpler substances. What type of matter is it?

lozanna [386]

Definetely element.

Hope this helps!

6 0

2 years ago

Read 2 more answers

NEED THE ANSWER !!! NOW i have like an hour

ryzh [129]

Answer No 1:

The chemical model that is flawed is:

4 C2 + S8 → 4 CS2

In this reaction, there are more number of carbon atoms in the reactants but lesser number of cabon atoms in the products. For a reaction to be balanced, there should be the same number of atoms in the reactants and products. Hence, option A does not represent a balanced equation.

Answer No 2:

The correct option is B) The model shows an unbalanced number of carbon atoms.

Consider the equation:

4 C2 + S8 → 4 CS2

In the reactants side of the equation, there are 8 atoms of carbon. In the products side there are only four carbon atoms. This shows that this equation in not balanced because of the carbon atoms.

The number of sulfur atoms remains same before the reaction and after the reaction. There are eight sulfur atoms in the reactants as well as products.

7 0

2 years ago

Is this equation balanced and in lowest form? 4NH➡ 2N² + 6H²

cestrela7 [59]

The given gives an equation 4NH➡ 2N² + 6H². The equation given is not correct since H is not balanced. on the right side,H is counted as only 4 while on the right side, H is 12. The compound on the right should be ammonia, NH3 in order to balance the equation.

7 0

3 years ago