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3 years ago

What is the energy levels of the outer electrons in sodium???need answer asap!!!

1 answer:

3 0

sodium only has one valence electron meaning that there is only one electron in the outer rim. so it will go... 1st energy lvl=2 electrons. 2nd energy lvl=8 electrons. and, 3rd energy lvl=1 electron.

Explanation:

hope i helped.

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Consider the reaction of 35.0 g of iron as follows:

77julia77 [94]

Explanation:

4Fe + 3O2 --> 2Fe2O3

Mass of iron = 35g

<em>How many moles of iron react?</em>

The relationship between mass and moles is given as;

Moles = mass / Molar mass

Molar mass of iron = 56g/mol

Number of moles = 35 / 56 = 0.625 mol

<em>How many moles of oxygen molecules must react?</em>

From the equation of the reaction;

4 mol of Fe reacts with 3 mol of Oxygen molecule

0.625 mol would react with x mol?

4 = 3

0.625 = x

x = 0.625 * 3 / 4 = 0.46875 mol

<em>How many moles of product form?</em>

From the equation of the reaction;

4 mol of Fe reacts to form 2 mol of Fe2O3

0.625 mol would form x mol of Fe2O3

4 = 2

0.625 = x

x = 0.625 * 2 / 4 = 0.3125 mol

<em>What mass of product forms?</em>

Moles = mass / Molar mass

Mass = Molar mass * Moles = 159.69 g/mol * 0.3125 mol = 49.9g

8 0

3 years ago

What is one practical use of the paper battery

love history [14]

Answer:

A paper battery can work even if it is folded, cut or rolled up. A Paper battery consists mainly of carbon and paper; it can be used to power pacemakers within the body. A paper battery can be used both as a capacitor and battery. It is an ultra-thin storage device.Oct 10, 2014

Explanation:

5 0

3 years ago

2ch4(g) c2h2(g) 3h2(g) describe what is happening within the system when it is at equilibrium in terms of concentrations, reacti

SashulF [63]

Balanced chemical reaction: 2CH₄(g) ⇄ C₂H₂(g) + 3H₂(g).

1) In a chemical reaction, chemical equilibrium is the state in which both reactants (methane CH₄) and products (ethyne C₂H₂ and hydrogen H₂) are present in concentrations which have no further tendency to change with time.

2) At equilibrium, both the forward and reverse reactions are still occurring.

3) Reaction rates of the forward and backward reactions are equal and there are no changes in the concentrations of the reactants and products.

4 0

3 years ago

Read 2 more answers

Concentration Calculation: Using your Trial 1 ‘difference in final volumes’ data from procedure II and procedure III, and the kn

Digiron [165]

Subtract the mass of the solute from the whole solution volume.

Molarity, percent by mass, and percent by volume are all ways to represent concentration.

By dividing the number of moles by the number of liters of water utilized in the solution, we can compute the molar concentration. Here, for instance, 1.25 L of water has entirely dissolved the acetic acid. In order to determine the molar concentration, which is 0.1332 M, divide 0.1665 moles by 1.25 L. A titration is a method for figuring out the concentration of an unknown solution by using a solution with known concentration.

Finding the concentration for each sample's absorbance on the standard curve is the first step in calculating the sample concentration based on the standard curve. The next step is to multiply the concentration by the dilution factor for each sample.

Learn more about concentration here brainly.com/question/10703427

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8 0

2 years ago

Is h2so4 a Arrhenius acid

MAVERICK [17]

Answer : Yes , H2SO4 is an arrhenius acid

<h2>Explanations : </h2>

• An ,Arrhenius acid ,is a substance that ,dissociates, in water to form ,hydrogen ions (H+).

• In other words, an arrhenius acid increases the H+ ion concentration in aqueous solution.

• This can be represented by the equation :

$H_SO_4^{-\text{ }}\rightleftarrows H^{+\text{ }}+SO_4^{2-}$

• Therefore, H2SO4 is a strong arrhenius acid.

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1 year ago

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