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3 years ago

Do electrons fill up the lowest or highest level

1 answer:

5 0

The electrons begin at the lowest level, and then fills up until it reaches the highest level, and completely fills the outer shell.

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Differentiate between compounds and mixtures using the particle model of matter.

trasher [3.6K]

Answer:

compounds are substance which can be formed by chemically combining two or more elements.

mixtures are substance that are formed by physically mixing two or more substances

8 0

2 years ago

Identify two natural hazards that are more likely to occur in Maryland

tamaranim1 [39]

Answer:

snow storm and a blizzard

Explanation:

7 0

3 years ago

The reaction of iron and water vapor results in an equilibrium3 Fe(s) + 4 H2O (g) ⇋ Fe3O4 (s) + 4 H2 (g) Kc = 5.0 at 800.°CWhat

labwork [276]

Answer: The equilibrium concentration of water is 0.1 M

Explanation:

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Volume of solution (in L)}}$

Given mass of hydrogen gas = 7.5 g

Molar mass of hydrogen gas = 2 g/mol

Volume of solution = 15.0 L

Putting values in above equation, we get:

$\text{Molarity of hydrogen gas}=\frac{7.5}{2g/mol\times 15.0}\\\\\text{Molarity of hydrogen gas}=0.25M$

For the given chemical equation:

$3Fe(s)+4H_2O(g)\rightleftharpoons Fe_3O_4(s)+4H_2(g)$

As, the reaction is initiated by hydrogen gas, the reaction will proceed backwards and the equilibrium constant will be the reciprocal of equilibrium constant for the given reaction.

Now, the reaction becomes:

$Fe_3O_4(s)+4H_2(g)\rightleftharpoons 3Fe(s)+4H_2O(g);K_c'$

Initial: 0.25

At eqllm: 0.25-4x 4x

We are given:

$K_c=5.0$

So, $K_c'=\frac{1}{5.0}=0.2$

The expression of $K_c'$ for above equation follows:

$K_c'=\frac{[H_2O]^4}{[H_2]^4}$

The concentration of pure solids and liquids are taken as 1 in the equilibrium constant expression.

Putting values in above equation, we get:

$0.2=\frac{(4x)^4}{(0.25-4x)^4}\\\\x=-0.126,0.025$

Neglecting the value of x = -0.126 because concentration cannot be negative.

So, equilibrium concentration of water = $4x=(4\times 0.025)=0.1M$

Hence, the equilibrium concentration of water is 0.1 M

7 0

3 years ago

A red blood cell has a round structure. A muscle cell has a long, thin structure. Which statement best explains why these two ty

Sphinxa [80]

Answer:

The red balloons have a biconcave disk structure, which is what is worded in the question seems to me a little wrong.

On the other hand, the elongated structure of muscle cells is due to a greater initial length in order to perform muscle contractions in a better way, or to perform their function at sea.

Something very important that the differences is that the red balloon does not have a nucleus (the muscle cell is multinucleated and has more mitochondrial load) and this structure is characteristic for being able to transport gases such as oxygen and disseminate them better in the body.

Explanation:

Red blood cells also have a shorter half-life than muscle cells, they are responsible for traveling throughout the body and renew their hemoglobin component after 120 days in the spleen.

On the other hand it is important to note that both work together when performing physical exercise, one donates oxygen and the other consumes it, considering that the muscle cell has more capacity to withstand hypoxic moments, that is why it supports lactic fermentations in anaerobic processes .

In summary, the red globule has this shape to act as gas transport, and the muscle cell to have a better start in contractile function.

3 0

3 years ago

Help plzzzzz it's due today ----- Would Shining light on the reaction increase or decrease the reaction rate

tangare [24]

Answer:

increase

Explanation:

Reactions that are initiated by light are called photochemical reactions. The brighter the light, the faster the reaction.

7 0

3 years ago

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