Can someone help me please

Answer:

y=meme3squared

Explanation:

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Answer:

Though a hydrogen atom has only one electron, it contains a large number of shells, so when this single electron jumps from one shell to another, a photon is emitted, and the energy difference of the shells causes different wavelengths to be released. Hence, mono-electronic hydrogen has many spectral lines.

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Answer:

[tex]161.9gZn[/tex]

Explanation:

Hello there!

In this case, according the given balanced chemical reaction:

[tex]Zn + 2HCl\rightarrow H_2 + ZnCl_2[/tex]

It is possible to evidence the 1:1 mole ratio of hydrogen (molar mass = 2.02 g/mol) to zinc (atomic mass = 65.41 g/mol) which is used to calculate the grams of the latter needed for the production of 5 grams of the former via stoichiometry:

[tex]5gH_2*\frac{1molH_2}{2.02gH_2}*\frac{1molZn}{1molH_2} *\frac{65.41gZn}{1molZn}\\\\=161.9gZn[/tex]

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Answer:

20. Mg(NO3)2

21. KClO3

22. CaSO4

23. (NH4)2SO4

24. HC2H3O

25.  CO is carbon dioxide, which is neutral and would not combine with a hydrogen ion. Did you mean H and CO3(2-)? That would be H2CO3 (carbonic acid)

Explanation:

You have to match the charges of the Cations and Anions.

Answer:

[tex]T_2=-53.15\°C[/tex]

Explanation:

Hello there!

In this case, in agreement to the Charles' law which states that the volume and temperature relate to each other via a directly proportional relationship at constant pressure, we can write:

[tex]\frac{T_2}{V_2} =\frac{T_1}{V_1}[/tex]

Thus, given V1, V2 and T1 (310 in Kelvin), we can solve for the final temperature as shown below:

[tex]T_2=\frac{T_1V_2}{V_1} \\\\T_2=\frac{310K*32.5mL}{45.8mL}\\\\T_2=220 K-273.15K\\\\T_2=-53.15\°C[/tex]

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156.975kj heat is required to raise the temperature of 0.50 kg of liquid water from 15℃ to 90℃.

The term specific heat is defined as the quantity of heat required to increase the temperature of one gram of a substance by one Celsius degree.

To calculate the energy required to raise the temperature of any given substance,

Given:

The mass of the material, m

The temperature change that occurs, ΔT

The specific heat capacity of the material, c (which you can look up). This is the amount of heat required to raise 1 gram of that substance by 1°C.

Q = m × c × ΔT

For water, the value of c is 4.186 J/g°C

Therefore,

Q = 500 × 4.186 × 75

= 156,975j

= 156.975kj

Thus, 156.975kj heat is required to raise the temperature of 0.50 kg of liquid water from 15℃ to 90℃.

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Answer:

glycerol

Explanation:

it is thick sweet liquid.It is type of alcohol which has 3 OH groups

Answer:

C. Methane

Explanation:

Hopefully this isnt too late!

Answer:

C. Methane

(Photo for proof at the bottom.)

Explanation:

All amino acids contain an amino group, a carboxyl group, and an R group. An amino group consists of NH2. A carboxyl group consists of COOH. And an R group usually consists of a hydrogen or carbon atom bonded to the amino acid. Methane only consists of CH4, which clearly does not meet the criteria of an amino acid.

Here's a photo of Edge incase you're doubtful.

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Answer: 4.) CH3O is the answer, which stands for Methoxide.

Explanation:

Answer:28 g

Explanation:

Answer:

Heat reaction

Explanation:

Heat must be applied in order to melt a substance.

Answer:

2 KOH + H₂SO₄ ⇒ K₂SO₄ + 2 H₂O

NaOH + HCl ⇒ NaCl + H₂O

Al₂(SO₄)₃ + 6 NaOH ⇒ 3 Na₂SO₄ + 2 Al(OH)₃

BaCl₂ + Na₂SO₄ ⇒ BaSO₄ + 2 NaCl

PbSO₄ + Na₂CO₃ ⇒ PbCO₃ + Na₂SO₄

Explanation:

In double displacement reactions, both reactants exchange their cations and anions.

2 KOH + H₂SO₄ ⇒ K₂SO₄ + 2 H₂O

NaOH + HCl ⇒ NaCl + H₂O

Al₂(SO₄)₃ + 6 NaOH ⇒ 3 Na₂SO₄ + 2 Al(OH)₃

BaCl₂ + Na₂SO₄ ⇒ BaSO₄ + 2 NaCl

PbSO₄ + Na₂CO₃ ⇒ PbCO₃ + Na₂SO₄

Answer:

Solubility product constant

Solubility

Saturated Solution

Common ion effect

Molar Solubility

Explanation:

If i have the ionic compound KNO3 for instance; the solubility product of the compound is the  product of the molarities of the dissolved ions, raised to a power equal to the ion's coefficient in the balanced chemical equation.

E.g

KNO3(s) ------> K^+(aq) + NO3^-(aq)

Ksp = [K^+] [NO3^-]

The solubility of any given substance is defined as mass of the substance in grams that dissolves in 100 mL of water.

A saturated solution is one that has dissolved the maximum amount of  solute at a given temperature. If more solute is added, it will not dissolve.

If i add AgCl to a solution of HCl, the solubility of AgCl in HCl solution is found to be less than its solubility in pure water because of the presence of a common Cl^-. Hence, common ion effect is a decrease in the solubility of an ionic compound as a result of the addition of a common ion to the solution.

The molar solubility of a substance is defined as the maximum number of moles of a substance that will dissolve in 1 L of solution.

The terms used to describe the followings are:

The molarity is the concentration unit used for the determination of the moles of solute in the liter of solution.

For example:

[tex]\rm H_2A\;\rightarrow\;2H^+\;+A^-\\Solubility\;product\;constant=[H^+]^2[A^-][/tex]

The solution with the maximum amount of salt dissolved at a certain temperature is termed the saturated solution. Further addition of the solute results in the precipitation of the solute in the solution.

The effect raised with the addition of the common ions is termed the common ion effect.

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Answer: In an endothermic reaction for whom the value of [tex]\Delta H[/tex] is positive has potential energy of the products greater than the potential energy of the reactants.

Explanation:

A chemical reaction in which heat energy is absorbed is called an endothermic reaction. For an endothermic reaction the value of [tex]\Delta H[/tex] is positive.

A chemical reaction in which heat energy is released is called an exothermic reaction. For an exothermic reaction the value of [tex]\Delta H[/tex] is negative.

In an endothermic reaction, heat energy is absorbed by the reactant molecules due to which the energy of products tend to increase. As potential energy is the energy acquired by a substance due to its position.

Therefore, we can conclude that in an endothermic reaction for whom the value of [tex]\Delta H[/tex] is positive has potential energy of the products greater than the potential energy of the reactants.

Answer:

C The potential energy of the products is greater than the potential

energy of the reactants.

Explanation:

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Answer:

Explanation:

The rock cycle basically tell you how the different types of rocks are related to each other and tells how they change over time.

Hope this helped!!!

Answer:

The rock cycle is the process by which rocks of one kind change into rocks of another kind. Metamorphic rock is igneous or sedimentary rock that has been heated and squeezed. It can erode into sediment or melt into a hot substance known as refordium. It is formed under extreme pressure and temperature deep inside mountain chains. For example, sedimentary rock shale becomes slate when heat and pressure are added, thus transforming it into another state of rudementury.

Answer: 6.38 moles of [tex]O_2[/tex] are needed to react with 2.55 mol of [tex]C_2H_2[/tex]

Explanation:

The balanced chemical reaction for the combustion of ethyne is:

[tex]2C_2H_2+5O_2\rightarrow 4CO_2+2H_2O[/tex]

According to stoichiometry:

2 moles of [tex]C_2H_2[/tex] require = 5 moles of [tex]O_2[/tex]

Thus 2.55 mol of [tex]C_2H_2[/tex] require = [tex]\frac{5}{2}\times 2.55=6.38[/tex] moles of [tex]O_2[/tex]

Thus 6.38 moles of [tex]O_2[/tex] are needed to react with 2.55 mol of [tex]C_2H_2[/tex]

Answer: I had that before it's a riddle. Here lemme find it and give you the answer.

Explanation:

1.H

2.E

3.C

4.O

5.U

6.L

7.D

8.U

9.T

10.P

11. N

12.T

13.I

14.T

15.D

16.O

17.N

18.W

Helium is a type of chemical element which is a noble gas that does not have odor, color, taste and does not contain toxicity. It's atomic number is 2  and is chemically represented with "He"

As a result of this, there are some unique characteristics of the Helium element which includes:

Please note that your question is disjointed so I gave you a general overview to help you understand the concept

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Answer:

Thermal energy depends on mass and temperature.

Explanation:

The two factors on which thermal energy depends are the mass of an object and temperature.

Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.

These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.There are the three types of thermal energy.

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Answer:

Na+ And A-

Explanation:

Answer: Na + and A-

Explanation:

Answer:

C. Water Vapor

Explanation:

Hope this helps! Have an Amazing day!!

Answer: Hewo, there! your answer is Below

c. water vapor Is the correct answer.

Explanation:

The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.

Hope this helps you!

Have a great day!!

-August-

Answer:

Faster, and the substance will be a gas.

Explanation:

I'm quite not sure with it. But, I've tried my best. Since maybe the substance is liquid

Answer: [tex]Molarity=Normality\times \frac{gew}{gmw}[/tex]

Explanation:

Molarity is defined as the number of moles dissolved per liter of the solution.

[tex]Molarity=\frac{\text {moles of solute}}{\text {Volume in L}}[/tex]

[tex]{\text {moles of solute}=\frac{\text {given mass}}{\text {Molar mass}}[/tex]  

Normality is defined as the number of gram equivalents dissolved per liter of the solution.

[tex]Normality=\frac{\text {gram equivalents of solute}}{\text {Volume in L}}[/tex]

[tex]{\text {gram equivalents of solute}}=\frac{\text {given mass}}{\text {Equivalent mass}}[/tex]

Thus [tex]Molarity=Normality\times \frac{\text {Equivalent mass}}{\text {Molar mass}}[/tex]

Answer:

Hello

The chemical bonds between the atoms of the decomposing compound are broken, and then rearranged between the atoms in new ways to make the products.

Explanation:

The chemical bonds between the atoms of the decomposing compound break, and new substances are formed as new chemical bonds form between the atoms of the elements of the decomposed compound.

Answer:

See explanation

Explanation:

Echo is the reflection of sound waves. Recall that ultrasound are also sound waves of high frequency.

When ultra sound meets an obstacle such as a bone, it is reflected backwards and gives rise to an echo back in the transducer.

Since ultrasound is high frequency sound wave wave; It does not passes through bone due to the high density of the bone, the data required may now be collected.

Answer:

Bleach, seawater, blood, water, coffee, orange, lemon

Explanation:

The pH is a measurement in chemistry defined as the -log [H⁺]. pH is used in quality control of materials. The pH is a scale from 1 (Acids) to 14 (Bases). The pH of 7 is for neutral solutions

Based on the information of the image, the most basic is bleach, then the seawater, the blood, water (Neutral), coffee, orange and, the most acidic is lemon.

The order is:

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