what is the full form of alcl3​

Answer:

NaNO3

NaCI

(NH4)2SO4

NH4Cl

Explanation:

Odyssey ware

Answer:

5.6

Explanation:

since HCl is a strong acid we know that it completely dissasociates into H+ and Cl-

We can just treat the HCl as the H+ concentration and take the -log

-log(2.5E-6) = 5.6

Answer:

1m

Explanation:

Answer: The algae lives on the crabs and this provides the crabs with a camouflage and gives the algae a place to live so this is beneficiary to both. In other words Spider crabs and Algae are Mutualism to eachothe.

Explanation:

Answer:

Arachnid?\

Explanation:

Answer:

8.03L

Explanation:

Given parameters:

Initial volume, V₁  = 8.7L

Initial temperature T₁  = 50°C , in Kelvin gives 50+273  = 323K

Final temperature T₂ = 25°C, in Kelvin gives 25 + 273  = 298K

Unknown:

Final volume V₂  = ?

Solution:

Since we are dealing with volume and temperature relationships under constant pressure, we simply apply the Charles's law.

Charles's law states that "the volume of a given mass of gas is directly proportional to the temperature provided the pressure remains constant".

Mathematically, we have;

              [tex]\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }[/tex]

where V andV T are volume and temperature, 1 and 2 are initial and final states.

Input the parameters and solve for V₂;

            [tex]\frac{8.7}{323} = \frac{V_{2} }{298}[/tex]

          V₂  = 8.03L

Answer:

The temperature would be 304, 87 K

Explanation:

We use the formula PV= nRT:

T= PV/nR = 1,00 atm x 100L /4,00 mol x 0,082 l atm/K mol=304, 87 K

The temperature would be 304, 87 K

Answer:

7.625g/cm³

Explanation:

Density = mass/volume

Volume of the block=2cm×2cm×4cm=16cm³

Mass of the block=122g

Density=122/16

=7.625

Therefore, the density of the block is 7.625g/cm³

Answer:

nonmetal atoms that share electrons

Answer:

See explanation below

Explanation:

To answer this better, let's write the overall equation:

Mg(s) + Fe²⁺(aq) -----------> Mg²⁺(aq) + Fe(s)

Now the question shows us options of which equation is the half reaction that describes reduction. To do this, we need to know what is happening here, and what a reduction means here.

A reduction in a reaction takes place when an atom or compound gains electrons. This can be easily identified in this reaction because when an atom has a higher positive number, means that it's losing electron, and if it has a lower positive number and even negative numbers, means that is gaining the electrons.

In other words, if you have a number line, and put the 0 in the center, any movement that goes from 1 position to the right of the line, means that it's losing electrons (oxidizing) and if it goes to the left, it's gaining electrons (Reduction).

With this explained, let's write the half reactions taking place:

Mg(s) -----------> Mg²⁺

Fe²⁺ -----------> Fe(s)

When an atom it's in solid state, the oxidation number of the atom it's always zero, therefore, in the case of Mg, it goes from 0 to 2+, and Fe goes from 2+ to 0. According to the explanation above, if we go to the left we are reducting and if we go to the right, we are oxidizing. Therefore, as Fe goes from 2+ to 0, this means that is gaining 2 electrons, and it's reducting while Mg, it's oxidizing and losing electrons.

The half reactions then:

Mg(s) -----------> Mg²⁺ + 2e⁻    (Oxidizing)

Fe²⁺ + 2e⁻-----------> Fe(s)       (Reducting)

In this case, it would be the option 1.

Answer:

It's A

Explanation:

The product X belongs to ester class of organic compounds.

Catalyst is a substance or material that speeds up a chemical reaction.

The chemical formula of ester group is RCOOR¹. Esters are formed when the alcohol and carboxylic acid reacts. Here butanoic acid is carboxylic acid and 1-pentanol is alcohol group.

The given equation is:

Butanoic Acid + 1-Pentanol [tex]\overset{H^+}\rightarrow[/tex] X + water

CH₃-CH₂-CH₂-COOH + CH₃-CH₂-CH₂-CH₂-CH₂OH  [tex]\overset{H^+}\rightarrow[/tex] CH₃-CH₂-CH₂-COO  CH₂-CH₂-CH₂-CH₂-CH₃ + water

Here X belongs to ester group.

Thus, from above conclusion we can say that the product X belongs to ester class of organic compounds.

Learn more about the Ester group here: https://brainly.com/question/9165411

#SPJ2

Answer:

Explanation:

The law of multiple proportions states that, when two elements can react with each other to form two or more different compounds, the weights of one element that react with a fixed weight of the other are in a ratio of small whole numbers.

1. If the mass of product obtained were 22.0g

Then, the mass of the oxygen atoms in the product would be:

The ratio of the weight of oxygen to the weight of carbon is 16.0 g to  6.0 g,

2. If the mass of product obtained were 14.0g.

3. Conclusion

Take a fixed amount of carbon equal to 3 grams.

Then, the amount of oxygen for the first compound would be 8 grams and the amount of oxygen for the second compound would be 4 grams.

That means that the ratio is 8 : 4 = 2.

Which is saying that, for the two compounds of carbon and oxygen, the weights of oxygen that reacts with a fixed weight of carbon are in a ratio of small whole numbers, in accordance to the law of multiple proportions.

Answer:

a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.

Explanation:

Hey there!

Your answer is no.

The difference between isotopes is the number of neutrons, not the number of protons.

For example, we have carbon-12 and carbon-14, two different isotopes of carbon. One has 6 protons and 6 neutrons, while one has 6 protons and 8 neutrons. They have the same amount of protons.

If you change the number of protons, then you have a different element. Isotopes are the same element.

Hope this helps!

Answer:

D

Explanation:

Answer:

A Alpha

Explanation:

Answer:

Li⁺

Explanation:

Li⁺ ions has a noble gas electron configuration because it resembles that of He.

To have a noble configuration, electrons in the outermost shell must completely fill their respective orbitals.

Li⁺ is an ion that has lost one electron from the usual number of 3 thereby remaining 2 electrons.

 The electronic configuration is given as;

         Li⁺       1s²

The S orbital can hold a maximum number of just two electrons.

     Helium atom has two electrons with electronic configuration of  1s²

Therefore      Li⁺   =    1s²    =    He

The Li+ ion has a noble gas electron configuration, which mirrors the electron configuration of helium (He) by having two electrons in the 1s subshell after losing one valence electron.

The Li+ ion has a noble gas electron configuration. Lithium (Li) has an atomic number of 3, which corresponds to three electrons in a neutral atom. These three electrons are arranged in the 1s subshell (two electrons) and the 2s subshell (one electron), giving lithium an electron configuration of 1s²2s¹. When lithium loses its one valence electron, it forms a Li+ cation with a configuration of 1s², which mirrors the electron configuration of the noble gas helium (He). Since lithium is an alkali metal in Group 1A of the periodic table, it tends to form a 1+ charge when it becomes an ion, which is indicated by the noble gas electron configuration it achieves as Li+.

Answer:

the wavelength, in nm, of the photon is 487.5 nm

Explanation:

Given:

n = 4 (excited)

n = 2 (relaxes)

Question: Calculate the wavelength, in nm, λ = ?

First, it is important to calculate the energy of the electron when it excited and then when it relaxes.

[tex]E_{1} =\frac{-13.6}{n^{2} } =\frac{-13.6}{4^{2} } =-0.85eV[/tex] (excited)

[tex]E_{2} =\frac{-13.6}{2^{2} } =-3.4eV[/tex] (relaxes)

The change of energy

ΔE = E₁ - E₂=-0.85 - (-3.4) = 2.55 eV = 4.08x10⁻¹⁹J

For a photon, the wavelength emitted

[tex]\lambda =\frac{hc}{delta(E)}[/tex]

Here

h = Planck's constant = 6.63x10⁻³⁴J s

c = speed of light = 3x10⁸m/s

Substituting values:

[tex]\lambda =\frac{6.63x10^{-34}*3x10^{8} }{4.08x10^{-19} } =4.875x10^{-7} m=487.5nm[/tex]

Answer: 1. Chloroplast

2. Light

3. Oxygen

Explanation: answer on edge

Answer:

How does photosynthesis occur?

The reactants collect in the  

✔ { chloroplast . }

✔{ Light  } energy from the sun drives chemical reactions.

The products include glucose and  ✔ { oxygen }, which is released into the air.

hope this helps here is a hug༼ つ ◕_◕ ༽つ

Answer : The oxygen will appears in the final chemical equation as a reactant.

Explanation :

The given chemical reactions are:

(1) [tex]C(s)+\frac{1}{2}O_2(g)\rightarrow CO(g)[/tex]

(2) [tex]CO(g)+\frac{1}{2}O_2(g)\rightarrow CO_2(g)[/tex]

Now we are adding reaction 1 and reaction 2, we get the final chemical equation.

The final chemical equation is:

[tex]C(s)+O_2(g)\rightarrow CO_2(g)[/tex]

Thus, the oxygen will appears in the final chemical equation as a reactant.

Answer:

The oxygen will appears in the final chemical equation as a reactant.

Explanation:

got a 100% on the unit test