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yuradex [85]
2 years ago
6

How many iron atoms are in 0.850 moles of iron

Chemistry
1 answer:
alexandr1967 [171]2 years ago
7 0

Answer:

5.12*10^2^3 atoms

Explanation:

0.85 moles Fe*\frac{6.022*10^2^3}{1 mole Fe}  =5.12*10^2^3

Use dimensional analysis to convert to moles by putting the moles of Fe (iron) on top and multiply by Avogadro's constant to cancel out moles and be left with atoms.

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Because rusting is a spontaneous process under standard conditions, which of the following is a correct conclusion about the pro
lawyer [7]

The correct conclusion about the process is that "DeltaG" is negative and the product of temperature and "DeltaS" is greater than "DeltaH". That is option C

Spontaneous reaction are natural reactions that occurs without depending on energy from external sources.

A typical example of a spontaneous reaction is the rusting of iron.

To know if a reaction is spontaneous, second law of thermodynamics is used through Gibbs free energy.

At standard conditions ( constant temperature and pressure), Gibbs free energy(G) is equal to enthalpy change(ΔH) minus product of temperature(T) and the entropy change (ΔS) of the system.

That is, ΔG =ΔH −TΔS,

Entropy (S) is a measure of the degree of disorderliness of a system.

Enthalpy (H) is the heat of the reaction which is positive when heat is given out or negative when heat is absorbed.

From the formula, when ∆G is less than 0, the reaction is said to be spontaneous.

For ∆G to be less than 0, this means ∆H(DeltaH) is less than 0 and T∆ S( product of temperature and "DeltaS") is greater than 0 to achieve a negative value for ∆G(DeltaG)

Therefore, DeltaG" is negative and the product of temperature and "DeltaS" is greater than "DeltaH".

Learn more about spontaneous reaction here:

brainly.com/question/24376583

5 0
2 years ago
Read 2 more answers
The following image shows the Atomic level of an element. In the image, which of
svp [43]

Answer:

D. The cation will use a type II naming system

Explanation:

As the element becomes stable, Option D is NOT taking place. That means that as the element becomes stable, the cation will NOT use a type II naming system. This is because in Type II binary compounds, the metal is not found in either Group 1 or Group 2 on the periodic table. It is as a result of this that the cation will not use a type II naming system.

Group 1 and Group 2 elements make use of type I naming system because in Type I binary compounds, the metal is present.

Option D is the correct answer.

4 0
3 years ago
Example of a stimulas and response in a organism
Goryan [66]

Answer:

Stimulus

Explanation:

Any change in an organism's environment that causes the organism to react. It is a scientific way of saying “cause”. Example: An animal is cold so it moves into the sun. Response: how the organism reacts to a stimulus and results in a change in behavior.

sorry if this isn't the answer you wanted

3 0
2 years ago
A piece of metal with a mass of 23.2 g at 120.1oC is placed in a styrofoam cup containing 35.0 g of water at 22.2oC. Once the sy
earnstyle [38]

Answer:

0.8797 J/g oC

Explanation:

use mcAT=mcaT

3 0
1 year ago
A 3.0 L solution contains 73.5 g of H2SO4. Calculate the molar concentration of the solution.
kozerog [31]
C_{m}=\frac{m}{MV}=\frac{73,5g}{98\frac{g}{mol}*3L}=0,25M\\\\
C_{1}V_{1}=C_{2}V_{2}\\\\
0,25M*3L=0,18M*V_{2}\\\\
V_{2}=\frac{0,25M*3L}{0,18M}\approx 4,17L\\\\
4,17L-3L=1,17L
6 0
3 years ago
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