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KiRa [710]
3 years ago
8

PLEASE ANSWER I GIVE BRAINLIEST AND MAX POINTS

Chemistry
1 answer:
d1i1m1o1n [39]3 years ago
7 0

Answer:

I believe the answer is A (changes in air temperature  result in differences in air pressure which causes wind). Hope this helps

Explanation:

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Calculate δg∘rxn and e∘cell for a redox reaction with n = 3 that has an equilibrium constant of k = 4.4×10−2. you may want to re
lapo4ka [179]
a) First, to get ΔG°rxn we have to use this formula when:

ΔG° = - RT ㏑ K 

when ΔG° is Gibbs free energy 

and R is the constant = 8.314 J/mol K

and T is the temperature in Kelvin = 25 °C+ 273 =  298 K 

and when K = 4.4 x 10^-2

so, by substitution:

ΔG°= - 8.314 * 298 *㏑(4.4 x 10^-2)

      = -7739 J  = -7.7 KJ


b) then, to get E
° cell for a redox reaction we have to use this formula:

ΔE° Cell = (RT / nF) ㏑K

when R is a constant = 8.314 J/molK

and T is the temperature in Kelvin = 25°C + 273 = 298 K

and n = no.of moles of e- from the balanced redox reaction= 3

and F is Faraday constant = 96485 C/mol

and K = 4.4 x 10^-2

so, by substitution:

∴ ΔE° cell = (8.314 * 298 / 3* 96485) *㏑(4.4 x 10^-2)

              = - 2.7 x 10^-2 V
  
8 0
3 years ago
Shoe companies imbed unique designs on the bottoms of the sneakers they manufacture. What is the main purpose of the designs on
Andreas93 [3]
It is to increase friction
3 0
3 years ago
At 25°c, the vapor in equilibrium with a solution containing carbon disulfide and acetonitrile has a total pressure of 250. torr
Sonbull [250]
For this question, we apply the Raoult's Law. The formula is written below:

P = P*x
where
P is the partial pressure
P* is the vapor pressure of the pure solvent
x is the mole fraction

The partial pressure is solved as follows:
P = Total P*x = (250 torr)(0.857) = 214.25 torr
Hence,
214.25 = (361 torr)(x)
<em>x = 0.593 or 59.3%</em>
8 0
3 years ago
If 38.55 mL of HCl is required to titrate 2.150 g of Na2CO3 according to the following equation, what is the molarity of the HCl
monitta

The molarity of the HCl solution : 1.052 M

<h3>Further explanation</h3>

Given

Volume of HCl = 38.55 ml

mass of Na₂CO₃ (MW=106 g/mol)=2.15 g

Reaction

Na₂CO₃(aq) + 2HCl (aq)→ 2NaCl (aq) + CO₂ (g) + H₂0 (l)

Required

The molarity of the HCl solution

Solution

mol Na₂CO₃ :

\tt mol=\dfrac{mass}{MW}=\dfrac{2.15}{106}=0.02028

From the equation, mol ratio Na₂CO₃ : HCl = 1 : 2, so mol HCl :

\tt mol~HCl=2\times 0.02028=0.04056

The molarity :

\tt M=\dfrac{n}{V}=\dfrac{0.04056}{0.03855~L}=1.052~M

7 0
2 years ago
When a solid melts
Reptile [31]
When solid melts, the temperature of the substances increases and the substance absorbs heat energy, converting the solid to a liquid.
5 0
2 years ago
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