Which of these processes removes carbondioxide from the air?

Answer:

write the balanced chemical equation of the reaction between strong acid and weak base also mention the types of salt obtained in the reaction

Explanation:

HCl → H+(aq) + Cl−(aq) (100%)

Any acid that dissociates 100% into ions is called a strong acid. If it does not dissociate 100%, it is a weak acid. HC2H3O2 is an example of a weak acid:

HC2H3O2→ H+(aq) + C2H3O2−(aq) (~5%)

Because this reaction does not go 100% to completion, it is more appropriate to write it as an equilibrium:

HC2H3O2 ⇄ H+(aq) + C2H3O2−(aq)

As it turns out, there are very few strong acids, which are given in Table 12.2 “Strong Acids and Bases”. If an acid is not listed here, it is a weak acid. It may be 1% ionized or 99% ionized, but it is still classified as a weak acid.

Answer:

The readings of equilibrium constant is incorrect.

Explanation:

There is a mistake in the value of equilibrium constant if the burette contains traces of distilled water because the water will be present in the solution from which equilibrium constant is calculated. The spectrophotometer did not give the correct reading because its calibration is incorrect. If we want to gain correct readings from the spectrophotometer, we must have to calibrate the instrument correctly.

Incorrect value of equilibrium constant is obtained.

Equilibrium constant of any reaction tells about the relative ration of the concentration of products to the reactants.

Value of equilibrium constant can be calculated in the aqueous medium where concentration of water also present. If we don't rinse the burette with the reaction solution then the already present traces of water affect the concentration of water during the calculation of equilibrium constant.

As the absorbance of any solution is also directly proportional to the concentration, so if the spectrometer is not calibrated accurately then incorrect value of absorbance also affects the value of equilibrium constant.

Hence, we get incorrect value of equilibrium constant for each of the given mistakes.

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Answer: d. Determining empirical formula

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

Step 1: If percentage are given then we are taking total mass is 100 grams.  So, the mass of each element is equal to the percentage given.

Step 2 : convert given masses into moles

Step 3 : For the mole ratio, divide each value of moles by the smallest number of moles calculated

Step 4: The mole ratio gives the empirical formula of the compund.

Answer:

See explanation

Explanation:

Energy of the photon (E) = 328 * 10^3/6.02 * 10^23 = 5.45 * 10^-19 J

Recall that E = hc/λ

h = Plank's constant = 6.36 * 10^-34 Js

c = speed of light = 3 * 10^8 m/s

λ = ??

λ = hc/E

λ = 6.36 * 10^-34 * 3 * 10^8/5.45 * 10^-19

λ = 3.5 * 10^-7 m

This falls into the UV region of the spectrum

Answer:

[tex]\%m/m=33.0\%[/tex]

Explanation:

Hello there!

In this case, since the percent by mass of a solute in a solution is computed via the following division:

[tex]\%m/m=\frac{m_{solute}}{m_{solute}+m_{solvent}} *100\%[/tex]

Next, given the mass of HCl and that of water, we plug them in to obtain:

[tex]\%m/m=\frac{22.5g}{22.5g+45.8g} *100\%\\\\\%m/m=33.0\%[/tex]

Best regards!

Answer:

To find the mass percent of hydrogen in hydrogen chloride, we must divide the weight of the hydrogen atom alone by the weight of the entire molecule. Then we multiply by 100% to find the percentage. Thus, 2.77% of the mass of hydrogen chloride is hydrogen.

Explanation:

i hope you understand better

Answer:

44.09562 grams

Explanation:

Answer:

tendency of molecules with unlike electrical charges to attract each other.

Explanation:

Explanation:

heyyyyyyyyy how are you sure

Answer: The question is incomplete and the options are not given but here are d options from another website.

a. Electronegativity increases as you move to the right of the periodic table.

B. Electronegativity is the ability of an atom to attract electrons.

c. A very electronegative atom easily gives up electrons.

d. Electronegativity increases with a decreased number of protons.

The correct options are

a. Electronegativity increases as you move to the right of the periodic table.

B. Electronegativity is the ability of an atom to attract electrons.

d. Electronegativity increases with a decreased number of protons.

Explanation:

This is because Electronegativity is the ability of an element to attract pair of electrons to itself.

Electronegativity increases as a result of increase in protons and when there is more electron pull.

As, the size of an element decreases, the valence electrons are attracted near to the nucleus. Therefore, there is increase in attraction between shared electron and nucleus.

Answer:

16.51%

Explanation:

The reaction that takes place is

Meaning that the white precipitate that formed is AgCl. Now we convert 0.535 g of AgCl into moles, using its molar mass:

Then we convert 0.00373 moles of AgCl into moles of CaCl₂, using the stoichiometric coefficients:

We convert moles of CaCl₂ into grams, using its molar mass:

Finally we calculate the percent of CaCl₂ by mass in the original mixture:

The percent calcium chloride by mass in the original mixture is 16.4%

The equation of the reaction between calcium nitrate and silver chloride is:

[tex]\mathbf{CaCl_2 + 2AgNO_3 \to 2 AgCl+Ca(NO_3)_2}[/tex]

Given that;

the number of moles of the precipitated AgCl is:

= 0.535 g / 143.32 g/mol

= 0.0037 moles

From the above reaction, If 2 moles of AgCl are formed  by 1 mole of CaCl2

Then, 0.0037 moles of AgCl will form (0.0037 × 1)/2 moles of CaCl2.

0.0037 moles of AgCl will form 0.00185 moles of CaCl2.

Now, we can say that the number of moles of CaCl2 present in the mixture is =  0.00185 moles

Mass amount of CaCl2 present = 0.00185 moles × 110.98 g/mol

Mass amount of CaCl2 present = 0.205 grams

Finally, the mass percentage   [tex]\mathbf{=\dfrac{0.205}{1.25}\times 100\%}[/tex]

= 16.4%

Therefore, we can conclude that the percent calcium chloride by mass in the original mixture is 16.4%

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Answer:

0.612 J/g°C

Explanation:

Using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat (Joules)

m = mass of substance (g)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C) i.e. final - initial temperature

According to the information provided in this question;

Q = 577 J

m = 32.3 g

c = ?

Final temp = 46.6ºC, initial temp. = 17.4°C

∆T = (46.6 - 17.4) = 29.2°C

Using Q = m × c × ∆T

c = Q ÷ m.∆T

c = 577 ÷ (32.3 × 29.2)

c = 577 ÷ 943.16

c = 0.6117

c = 0.612 J/g°C

Answer:

Coal

Explanation:

thx for points :D

Answer:

Coal

Explanation:

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Answer:

Jet ğıpep2pep2p2pp3oroe88r82

Answer:

It takes 12,000 Joules of energy to melt 35 grams of ice at 0 °C

Explanation:

Good Luck!

Answer:

i dont know

Explanation:

its simple i dont know

Answer:

Explanation:Red

A

because both have 2's in front of them

Answer: Dynamic equilibrium

Explanation:

Answer:

Answer:

                 2.77 × 10²³ Br Atoms

Solution:

Data Given:

                Mass of CH₂Br₂  =  39.9 g

                M.Mass of CH₂Br₂  =  173.83 g.mol⁻¹

Step 1: Calculate Moles of CH₂Br₂ as,

                Moles  =  Mass ÷ M.Mass

Putting values,

                Moles  =  39.9 g ÷ 173.83 g.mol⁻¹

                Moles  =  0.23 mol

Step 2: Calculate number of CH₂Br₂ Molecules,

As 1 mole of any substance contains 6.022 × 10²³ particles (Avogadro's Number) then the relation for Moles and Number of CH₂Br₂ Molecules can be written as,

        Moles  =  Number of CH₂Br₂ Molecules ÷ 6.022 × 10²³ Molecules.mol⁻¹

Solving for Number of CH₂Br₂ Molecules,

         Number of CH₂Br₂ Molecules  =  Moles × 6.022 × 10²³ Molecules.mol⁻¹

Putting value of moles,

         Number of CH₂Br₂ Molecules  =  0.23 mol × 6.022 × 10²³ Atoms.mol⁻¹

         Number of CH₂Br₂ Molecules  =  1.38 × 10²³ CH₂Br₂ Molecules

Step 3: Calculate Number of Br Atoms:

As,

                              1 Molecule of CH₂Br₂ contains  =  2 Atoms of Br

So,

           1.38 × 10²³  Molecules of CH₂Br₂ will contain  =  X Atoms of Br

Solving for X,

                     X  =  (1.38 × 10²³ CH₂Br₂ × 2 Br) ÷ 1 CH₂Br₂

                      X =  2.77 × 10²³ Br Atoms

Explanation:

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Answer: C3H8 + 5O2 ---> 3CO2 + 4H2O

Explanation: This is an example!

I hope this helped!

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Answer:

[tex]2Fe +N_{2} -> 2FeN[/tex]

Explanation:

Iron is Fe, nitrogen is N. Nitrogen is diatomic, which means it occurs as a molecular pair by itself. Iron III nitride has a chemical formula of FeN because nitrogen has a charge of 3-, and iron III tells us the iron has a charge of 3+ so you just need one of each to make the charges balance and the compound neutral.

When iron reacts with nitrogen to form iron(III) nitride, the balanced chemical equation of this reaction is as follows:

2 Fe + N₂ → 2FeN

The term balanced chemical equation is defined as a chemical equation in which mass is conserved and there are equal numbers of atoms of each element on both sides of the equation.

The chemical equation must be balanced in order to obey the law of conservation of mass. When the number of different atoms of elements in the reactants side equals the number of atoms in the products side, the chemical equation is balanced.

Nitrogen is diatomic, that means it occurs as a molecular pair by itself. Iron III nitride has a chemical formula of FeN because nitrogen has a charge of 3-, and iron III tells us the iron has a charge of 3+ .

Thus, iron reacts with nitrogen to form iron(III) nitride.

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Answer:

whats the answer//

Explanation:

Answer:

A,D,G,H

Explanation:

Mathematics

Climatology

Remote sensing

Geographic information systems

Answer:

Neil Bohr

Explanation:

Thank me latur✊

Answer:

(a) The most acidic compound - oxalic acid

    The least  acidic compound - acetic acid

(b) The most acidic compound - 2,4-dinitrobenzoic acid

   The least acidic compound -  p-bromobenzoic acid

(c) The most acidic compound - benzoic acid

    The least acidic compound - cyclohexanol

Explanation:

(a) Presence of electron donating group decreases the acidity of carboxylic acid. Therefore , acetic acid is least acidic due to methyl group on carbon of          -COOH group.

Oxalic acid is the most acidic compound due to presence of 2 -COOH group.

(b) Presence of electron withdrawing group increases the acidity of benzoic acid. 2,4-dinitrobenzoic acid will be more acidic as it has two strong electronegative substituents ([tex]-NO_2[/tex] group).

p-bromobenzoic acid will be less acidic than p-nitrobenzoic acid beacuse Br is weaker electron withdrawing group than [tex]NO_2[/tex]

(c) pKa value of benzoic acid(4.45) is more than other compounds and cyclohexanol has least pKa value (16).(Since , higher the pKa value , least acidic the compound is )

Answer:

Student 4

Explanation:

In the structure of the atom of an element, there are protons, electrons and neutrons. The number of protons in the atom of such element determines the atomic number of the element. For example, if Calcium contains 20 protons, the atomic no of Calcium will be 20. Since this is so, it means that the identity of an element on the periodic table can be known using the number of protons/atomic no.

According to this question, four students are gathering information on elements to determine their identity. Based on the explanation above, it takes only the number of protons = atomic no. of the element to identify it. Hence, student 4, who counts the number of protons will correctly identify the element using his/her data.

Answer:

Domain

Explanation:

This is because Linnaeus taxonomy is a system of classification which was invented by a swedish Botanist called Carl Linnaeus and it is refered to hierarchy of grouping organisms called taxa. It involve 7 system of classifications and they include Kingdom, Phylum, Class, Order, Family, Genus, and Species.