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3 years ago

Which of the following does not contribute to water vapour to the atmosphere

Chemistry

1 answer:

vampirchik [111]3 years ago

3 0

Answer:

<h2>Industry </h2>

Explanation:

because industry is a building not a weather or related on nature

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Which of the following is true of the instinct approach to motivation

Novay_Z [31]

Your question isn’t finished you have to give us the answer choices

7 0

3 years ago

Calculate the Equilibrium constant Kc at 25 C from the free - energy change for the following reaction . Zn(s) + 2Ag+(aq)<---

FinnZ [79.3K]

Answer: $Kc=1.24*10^5^2$

Explanation: For the given reaction:

$Kc=\frac{[Zn^+^2]}{[Ag^+]^2}$

Concentrations of the ions are not given so we need to think about another way to calculate Kc.

We can calculate the free energy change using the standard cell potential as:

$\Delta G^0=-nFE^0_c_e_l_l$

$E^0_c_e_l_l$ can be calculated using standard reduction potentials.

Standard reduction potential for zinc is -0.76 V and for silver, it is +0.78 V.

$E^0_c_e_l_l$ = $E^0_c_a_t_h_o_d_e+E^0_a_n_o_d_e$

Reduction takes place at anode and oxidation at cathode. As silver is reduced, it is cathode. Zinc is oxidized and so it is anode.

$E^0_c_e_l_l$ = 0.78 V - (-0.76 V)

$E^0_c_e_l_l$ = 0.78 V + 0.76 V

$E^0_c_e_l_l$ = 1.54 V

Value of n is two as two moles of electrons are transferred in the cell reaction F is Faraday constant and its value is 96485 C/mol of electron .

$\Delta G^0=-(2*96485*1.54)$

$\Delta G^0$ = -297173.8 J

Now we can calculate Kc using the formula:

$\Delta G^0=-RTlnKc$

T = 25+273 = 298 K

R = $8.314JK^-^1mol^-^1$

--297173.8 = -(8.314*298)lnKc

297173.8 = 2477.572*lnKc

$lnKc=\frac{297173.8}{2477.572}$

lnKc = 119.946

$Kc=e^1^1^9^.^9^4^6$

$Kc=1.24*10^5^2$

5 0

3 years ago

1. Compare and contrast active transport and passive transport. Include at least one similarity and one difference between the t

kolbaska11 [484]

Hello,

Your brainliest answer would be:

1A. Both involve ion movements

1B. Passive transport moves ions from high concentration to low, using no metabolic energy.

2A. Both passive transport processes.

2B. Diffusion refers to the movement of any chemical from one place to another, whereas osmosis exclusively from one place to another.

Plz mark me brainliest!

Hope this helps!

4 0

4 years ago

A scientist has 400 ml of an 8% solution. How much water needs to be added to reduce this to a 2% solution?

mr_godi [17]

Answer:

Explanation:30

7 0

4 years ago

The chemical formula H2O represents one molecule of water.

Gennadij [26K]

There is a total of three atoms present in the water (H₂O) molecule.

An atom is the smallest particle of an element that may or may not be capable of independent existence.

<h3>What is a molecule?</h3>

A molecule is the smallest particle of an element or compound that can exist freely.

<h3>What is a subscript?</h3>

Subscripts are the numbers that come below after a symbol. They tell you the number of atoms of an element. If there is no subscript then it is understood that the subscript is 1.

<h3>How to calculate the number of atoms in a molecule?</h3>

For calculating the number of atoms in a molecule, add the subscripts of that molecule, and you will get the total atoms of it.

For example, in molecule C₂H₅O, there are 2 carbon atoms, 5 hydrogen atoms, and 1 oxygen atom.

Add the subscripts

2 + 5 + 1 = 8

Hence, there is a total of 8 atoms in C₂H₅O.

For the H₂O molecule,

2 + 1 = 3

Hence, there is a total of 3 atoms present in one water molecule.

Learn more about atoms and molecules:

brainly.com/question/17869588

#SPJ1

7 0

1 year ago