Why do you have to have set amounts of compounds

Answer:

It's C, direct and peripheral.

Explanation:

Just took the test

The elaboration likelihood model emphasizes the use of direct persuasion

and peripheral persuasion methods.

This theory involves a dual process which explains how attitudes are

changed in individuals through persuasion. The two methods of persuasion

include:

These methods help in the formation of attitude which makes option C the

most appropriate choice.

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Answer:

compound

Explanation:

Answer:

166 g/mol

Explanation:

Step 1: Write the neutralization reaction

H₂A + 2 NaOH ⇒ Na₂A + 2 H₂O

Step 2: Calculate the reacting moles of NaOH

48.3 mL of 0.0700 M NaOH react.

0.0483 L × 0.0700 mol/L = 3.38 × 10⁻³ mol

Step 3: Calculate the reacting moles of H₂A

The molar ratio of H₂A to NaOH is 1:2. The reacting moles of H₂A are 1/2 × 3.38 × 10⁻³ mol = 1.69 × 10⁻³ mol.

Step 4: Calculate the molar mass of H₂A

1.69 × 10⁻³ moles of H₂A have a mass of 0.281 g. The molar mass of H₂A is:

M = 0.281 g / 1.69 × 10⁻³ mol = 166 g/mol

Answer:

b) The tin electrode gains mass and the tin electrode is the cathode.

Explanation:

Iron(ii) ion, Fe⁺ is higher than tin(ii) ion, Sn²⁺ in the electrochemical series, therefore, tin (ii) iron is preferentially discharged to iron(ii) ion in aqueous solutions.

Also, since oxidation occurs at the anode and reduction occurs at the cathode, in the Galvanic cell constructed from the following half cells, linked by a KCl salt bridge: an Fe electrode in 1.0 M FeCl2 solution and a Sn electrode in 1.0 M Sn(NO3)2 solution, the Fe electrode serves as the anode, while the Sn electrode serves as the cathode.

The Sn²⁺ ions in the aqueous solution of Sn(NO₃)₂ will accept electrons from the Sn cathode and become deposited as neutral Sn atoms. At the anode, neutral Fe atoms will dissolve into the FeCl₂ solution depositing their electrons at the anode, thereby losing mass.

Therefore the correct option is: (b) The tin electrode gains mass and the tin electrode is the cathode.

Answer:

[tex]2.5[/tex] × [tex]10^{-4}[/tex]

Explanation:

[tex]5+10^{-5} + 2[/tex] × [tex]10^{-4} = 0.5[/tex] × [tex]10^{-4} + 2[/tex] × [tex]10^{-4}[/tex]

[tex]0.5[/tex] × [tex]10^{-4} + 2[/tex] × [tex]10^{-4}[/tex] = [tex]2.5[/tex] × [tex]10^{-4}[/tex]

In the provided issue, the scientific notation-expressed integers 5.0x10-5 and 2.0x10-4 are added, and the solution is 2.5x10^-4.

Thus, first transform the smaller integer to have the same exponent as the larger number in order to complete the addition. In this situation, by shifting the decimal point one position to the right, we rewrite 5.0x10-5 as 0.5x10-4.

The outcome of adding the numbers together is 2.5. Finally, we use the common exponent—in this example, -4—to express the result in scientific notation. The final solution is 2.5x10^-4 as a result. Therefore, by adjusting the exponent and adding the numbers, the final solution, 2.5x10^-4 is obtained.

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Answer:

An appropriate solvent is carbon tetrachloride [tex](CCl_{4} )[/tex] because its IR stretches are not visible in the infrared region.

Explanation:

Non-polar solvents don not show peaks at the IR frequency region because they do not have dipoles which would absorb the infrared light. This makes them suitable solvents in IR Spectroscopy.

Therefore non-polar solvents such as CCl4 or Carbon disulfide are appropriate for the IR spectrum. They also do not interfere with the halide disks used in the spectrometer, as a solvent like water would.

Let me know if you need any other assistance.

Answer: Li^+ (g) ----> Li^2+ (g) + e^-

Considering the definition of first and second ionization energy, the second ionization energy of lithium is:

Li⁺ →  Li²⁺  +  1 e-

In first place, the electrons are attracted to the nucleus and it is necessary to provide energy to start them. Ionization energy is the energy required to remove an electron from a gaseous atom, isolated and in a ground state. The electrons in the last shell, which are the weakest attracted to the nucleus, are always lost. In this way the neutral atom becomes a gaseous cation (ion with a positive charge).

So, in this case, the first ionization energy of lithium is:

Li →  Li⁺  +  1 e-

The energy required to remove a second electron is called the second ionization energy and due to the difficulty of removing an electron from a positive particle, its value is greater than the first ionization energy (the volume of a positive ion is less than that of the neutral atom and the electrostatic force is greater in the positive ion than in the atom)

Finally, in this case, the second ionization energy of lithium is:

Li⁺ →  Li²⁺  +  1 e-

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Answer:

it's zero

Explanation:

water is composed of hydrogen and oxygen

Answer:

Approximately [tex]3.81\; \rm m[/tex].

Explanation:

Look up the density [tex]\rho[/tex] of carbon tetrachloride, [tex]\rm CCl_4[/tex], and glycerol:

Let [tex]g[/tex] denote the gravitational field strength. (Typically [tex]g \approx 9.81\; \rm N \cdot kg^{-1}[/tex] near the surface of the earth.) For a column of liquid with a height of [tex]h[/tex], if the density of the liquid is [tex]\rho[/tex], the pressure at the bottom of the column would be:

[tex]P = \rho\cdot g \cdot h[/tex].

The pressure at the bottom of this carbon tetrachloride column would be:

[tex]\begin{aligned} P &= \rho \cdot g \cdot h \\ & \approx 1.59\times 10^{3} \; \rm kg \cdot m^{-3} \times 9.81\; \rm N \cdot kg^{-1} \times 3.02 \; \rm m \approx 4.71 \times 10^{4} \; \rm N \cdot m^{-2} \end{aligned}[/tex].

Rearrange the equation [tex]P = \rho\cdot g \cdot h[/tex] for [tex]h[/tex]:

[tex]\displaystyle h = \frac{P}{\rho \cdot g}[/tex].

Apply this equation to calculate the height of the liquid glycerol column:

[tex]\begin{aligned}h &= \frac{P}{\rho \cdot g} \\ &\approx \frac{4.71 \times 10^{4}\; \rm N \cdot m^{-2}}{1.26 \times 10^{3}\; \rm kg \cdot m^{-3} \times 9.81\; \rm N \cdot kg^{-1}} \approx 3.81\; \rm m\end{aligned}[/tex].

Answer:

[tex]\boxed {\boxed {\sf D. \ They \ allow \ eukaryotes \ to \ reproduce}}[/tex]

Explanation:

Gametes are also called sex cells.

There are two types: the sperm (male) and egg (female). Gametes are haploid or contain half of the genetic information. When they unite and fertilize, they combine the two halves of the genome to create a diploid zygote that has one complete set of genetic information.

This process is known as sexual reproduction, the type of reproduction that eukaryotes (organism with cells containing a nucleus with DNA and membrane bound organelles) typically use.

So, based on the information we know above, the best answer choice is D. They allow eukaryotes to reproduce

Answer:

finding believability

Answer:

Vascular plants are plants found on land that have lignified tissues for conducting water and minerals throughout the body of the plant. Non-vascular plants are plants mostly found in damp and moist areas and lack specialized vascular tissues. Vascular plants are also known as tracheophytes.

Explanation:

Answer:

The correct answer is B. The presence or absence of xylem and phloem.

Explanation:

I did this quiz. :)

Answer:

0.06520959450500399

Explanation:

Answer:

46.0055

Explanation:

Answer:

Conduction

Explanation:

The handle is touching the pot.

And I got it wrong

Explanation:

The larger the radius of an atom, the lesser the electronegativity of the atom. This is because of the screening effect.

Answer:

2 hours and 4 mins

Answer:

False

Explanation:

Answer:

true i think but dont take my word for it.✌

According to the electronic configuration, carbon has 4 valence electrons that makes it a very stable atom that readily bonds.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer:

c or d

Explanation:

C! The amount of bacteria and impurities in water both before and after it passes through his filter!

Explanation:

Although each of these properties of Stuart's filter may be worth testing, the one that will tell him whether his filter can make lake water safe to drink is the amount of bacteria, parasites, and impurities in water both before and after it passes through his filter. Some filters are good at removing impurities, but not bacteria. Other ways of purifying water may kill bacteria but not remove impurities.

use the periodic table the atomic number of copper is 29 so neutral copper atoms have 29 protons and 29 electrons to estimate the number of neutrons in the atom round the atomic mass to 64 and subtract the atomic number the atomic number is the number of protons. do the same thing for gold and u have your atomic models for each.

Answer:B electrons fill orbitals In order of their increasing energy from left to right

Explanation:

The average atomic mass of Rubidium : 85.556 u

Isotopes are atoms that have the same atomic number but different mass numbers

Each isotope has an abundance which is usually expressed as a percentage

The average relative mass of atoms is obtained by adding the product of the percentage and mass of each isotope

Can be formulated:

[tex]\tt Average~Mass~atom~X=mass~isotope~ 1\times \%1+mass~isotope~2\times \%2+..[/tex]

The abundance of ​ 85​ Rb is 72.2% and the abundance of 87​ Rb is 27.8%, so

mass isotope 1=85, %abundance=72.2

mass isotope 2=87, %abundance=27.8

The averages atomic mass of Rubidium :

[tex]\tt average~atomic~mass=85\times 0.722+87\times 0.278\\\\average~atomic~mass=61.37+24.186\\\\average~atomic~mass=\boxed{\bold{85.556~u}}[/tex]

Answer:

The mole ratio is --> 1: 2

5 moles of N2

Explanation:

The balanced equation shows us that for every mole of N2, 2 moles of NH3 will be produced.

This also means that in order for 10 moles of NH3 to be produced, 5 moles of N2 need to react

Answer:

The answer is given to you by as04621.

Explanation:

Answer:

Wind energy

Explanation:

Answer: Wind energy

Explanation:

Answer:

Explanation:

Initial burette reading = 1.81 mL

final burette reading = 39.7 mL

volume of NaOH used = 39.7 - 1.81 = 37.89 mL .  

37.89 mL of .1029 M NaOH is used to neutralise triprotic acid

No of moles contained by 37.89 mL of .1029 M NaOH

= .03789 x .1029 moles

= 3.89 x 10⁻³ moles

Since acid is triprotic ,  its equivalent weight = molecular weight / 3

No of moles of triprotic acid = 3.89 x 10⁻³ / 3

= 1.30   x 10⁻³ moles .

Answer: 90%

Explanation:

So we need to find the molar mass of the entire compound, and the mass of carbon times the number of molecules:

Molar mass: 3*12 + 4*1 = 40

Mass of carbon: 12*3 = 36

36/40 * 100 = 9/10 * 100 = 90%

Answer:

the answer is +5

Explanation:

good luck :)

Answer:

stomach

Explanation:

stomach

Answer:

Stomach

Explanation:

The heart and lungs aren't part of the digestive system and intestinal tissue is just tissue, not the organ

Answer:

I think it's B

Explanation:

Well I'm pretty sure it's not C or D. And A is detachment or removal of soil by water, And the picture doesn't look like that. So the only explanation is B

Answer:

I go for B.

Explanation: