what is indicated by the methyl- prefix ​

Answer:

B - The energy of reactants is conserved.

D - the nuclei of atoms changes completely ( if that's the option)

multiplying terrorist to power 23, divided by 96. Multiplied by 12.7. so this is 76.48

7.96 x 10²² particles would be found in a 12.7g sample of ammonium carbonate. A particle is a tiny, localized item.

A particle is a tiny, localized item that may be defined by a number of physical or chemical characteristics, including volume, density, and mass. They range significantly in size or number from tiny particles like atoms to subatomic particles such as the electron.

Depending upon their density, particles can potentially be utilized to mimic even bigger things, such as moving celestial bodies or a throng of people. Although the meaning of the word particle is quite broad, different scientific disciplines might refine it as necessary. Any substance made up of particles is referred to as a particulate.

number of moles = given mass/ molar mass

                            = 12.7/  96.08

                            = 0.13moles

number of particle=  0.13 ×   6.022×10²³  

                              = 7.96 x 10²²    

Therefore, 7.96 x 10²² particles would be found in a 12.7g sample of ammonium carbonate.

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From the calculations, the heat of fusion of the substance is 0.73 kJ

The heat of freezing is the energy released when the substance is converted from liquid to solid.

Now we know that the molar mass of the substance is 82.9 g/mol  hence the number of moles of the substance is;  13.3 g /82.9 g/mol  = 0.16 moles

Now the heat of fusion shall be;

H = 4.60 kj/mol * 0.16 moles

H = 0.73 kJ

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Answer:

What is the difference between pools and fluxes?

Image result for Is industry pool or flux

Fluxes describe the movement of energy and matter between different pools. When you pour a glass of juice for yourself, the juice bottle and the glass are both “pools” for the apple juice. The act of pouring it from the bottle to the glass is the flux

Explanation:

In this case, among the list of components given, the abiotic factors are water, rock, soil, and sun.

An abiotic factor is a non-living part of an ecosystem that shapes its environment.

Biotic and abiotic factors make up a community via interaction.

Biotic factors are considered living things (having "life") while abiotic factors are simply non-living things.

Hence, in this case, among the list of components given, the abiotic factors are water, rock, soil, sun

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Americium is a radioactive element .

The nuclear reaction.is given by

[tex]\rm {}^{241}_{95}Am\longrightarrow {}^{237}_{93}Np+{}^4_2\alpha[/tex]

Here alpha can be written as He too

Answer:

When a substance is cooled, its internal energy decreases: the movement of its particles decreases. bonds between particles form when a substance condenses or freezes, or sublimes to form a solid from a gas. What is called energy? Energy is the capacity of a physical system to do work.

Explanation:

Answer:

increasing the pressure

Explanation:

You can make a solution more concentrated by increasing the pressure.

The ionization constant from the reaction as shown in the calculation is 5.8.

The term ionization constant refers to the extent to which the acid is ionized in solution. It is calculated from;

Ka = [H3O^+] [Cl]/[HCl]

Thus when we substitute the values;

Ka = 13.3 * 7.4/ 16.9

Ka = 5.8

The ionization constant from the reaction as shown in the calculation is 5.8.

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The conductance of the electric current through the electrolytic solution increases with increase in concentration.

An electrolytic solution is a solution containing dissolved electrolyte.

The ions of the electrolyte dissociate and are able to carry electric current around the electrolytic cell.

The higher the concentration of the electrolyte, the more electric current it can conduct due to greater number of ions present.

Therefore, the conductance of the electric current through the electrolytic solution increases with increase in concentration.

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The wave which is created by causing vibrations in particles of matter is a mechanical wave.

A wave is a disturbance in a medium which transmits transmits energy from one point to another without a permanent displacement of the particles of the medium.

Types of waves include:

Mechanical waves are waves which are produced as a result of the vibrations of the particles of the medium.

Therefore, the wave which is created by causing vibrations in particles of matter is a mechanical wave.

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The new volume of the gas given the data from the question is  1/2X mL

Data obtained from the question

Initial volume (V₁) = X mL

Initial pressure (P₁) = 2 atm

New pressure (P₂) = 4 atm

New Volume (V₂) = ?

How to determine the new volume

The new volume of the gas can be obtained by using the Boyles’ law equation as illustrated below:

P₁V₁ = P₂V₂

2 × X = 4 × V₂

2X = 4V₂

Divide both side by 4

V₂= 2X / 4

V₂ = 1/2X mL

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The solid would be caught on a filter paper or membrane while the liquid passes through.

Filtration is used to separate a mixture of insoluble substances in a liquid.

Since the aim is to separate the insoluble component of the mixture from the liquid, filtration using a suitable filter paper or membrane will be the way out.

The liquid will pass through the filter paper or the membrane while the insoluble component will be caught. This can then be dried and collected accordingly.

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Addition of pure water does not change pH of a solution because pure water has neutral pH.

Even though you continue to add pure water into a substance, the acidity or alkalinity of substance still remains the same to that of substance because pure water has neutral pH which can't change the acidity or alkalinity of a solution.

So we can conclude that addition of pure water does not change pH of a solution because pure water has neutral pH.

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When a solid dissolves in a liquid to form a solution, solid particles become evenly dispersed among liquid particles.

Solutions are formed when a solute particle dissolves in another substance known as a solvent.

Usually, solutions are formed when solids dissolve in liquids.

The solid is the solute while the liquid is the solvent.

When a solid dissolves in a liquid, solid particles become evenly dispersed among liquid particles.

Therefore, solutions are formed when solute particles dissolve in solvents.

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Answer:

c

Explanation:

chem ed 2022

The moles of unknown weak acid (HA) in a 100L solution are required to produce a solution with pH 2 is 0.002 moles.

The acid dissociation constant of an acid is given by the formula below:

[tex]K_a= \frac{[A^{-}][H_3O^{-}]}{[HA]}[/tex]

Where

Since, the Ka is given at equilibrium concentrations, [H3O+] = [A-]

[A-] = 10^-2

Making [HA] subject of the formula:

[tex][HA]= \frac{[10^{-2}][10^{-2}]}{5 \times 10^{ - 3} } = 0.02[/tex]

Moles of acid = 0.1 × 0.02 = 0.002 moles

Therefore, the moles of unknown weak acid (HA) in a 100L solution are required to produce a solution with pH 2 is 0.002 moles.

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Answer:

1. not affected by a magnet                      1 liquid

2. mostly space                                          2 solid

3. flows freely but particles still attract 3 proton

4. positively charged particles                  4 gas

5. free to move in all space                       5 alpha particles

6. negatively charged particles                 6 atoms

7. atoms nearly fixed in space                   7 gamma ray                                                    8. helium nucleus                                        8 electron (beta)

Answer:

During DNA replication, each of the two strands that make up the double helix serves as a template from which new strands are copied. The new strand will be complementary to the parental or “old” strand. Each new double strand consists of one parental strand and one new daughter strand.

Explanation:

hope it helps you

Answer:Your can use the internet There is a web site that is called periodic table.com it is very use full

Explanation:Have fun

Answer: Infiltration

Explanation: it is the process by which surface water, rainwater or snowmelt seeps into the ground

You could let the air out of the balloon while it is under the water with a container filled with water upside down over it. And measure the water displacement.

Answer: 341.6k

Explanation:

R= 0.0821

n= 0.46moles

v= 13.3L

p= 734mmhg = 734/760 = 0.97

[tex]T = \frac{p*v}{n*R}[/tex]

[tex]T = \frac{0.97*13.3}{0.46*0.0821}[/tex]

T= 341.6k

Answer:

10100101

Explanation:

this is for the other person alt.

The mass of [tex]Na_2CO_3[/tex] that will be required to be dissolved in water would be 15.9 grams

Recall that:  molarity = mole/volume in L

In this case, the volume is 0.3 L and the molarity is 0.5 M.

Thus, mole = molarity x volume = 0.5 x 0.3 = 0.15 moles

Mass of 0.15 moles  [tex]Na_2CO_3[/tex] = 0.15 x 106 = 15.9 grams

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The actual yield of the experiment given the data from the question is 92.4 g (Option B)

This is the ratio of the actual yield to the theoretical yield of a given reaction multiplied by 100

Percentage yield = (Actual / Theoretical) × 100

This is the amount obtained from the expriment procedures

This is the amount obtained from simple calculations as regarding the experiment.

Actual yield = percentage yield × theoretical yield

Actual yield = 80.34% × 115

Actual yield = 0.8034 × 115

Actual yield = 92.4 g

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Answer:

Explanation:

You would have to add up the atomic masses of all the compounds in the compound, making sure you include how many molecules of each are in the compound

For example, in CuSOA we have 1 molecule of Cu and S, as 4 molecules of O

The atomic masses are as follows:

Cu = 63.55 u

S = 32.065 u

O = 15.99 units

This is how we would add it up:

(Atomic mass of Cu) + (Atomic mass of S) + 4(Atomic Mass of O)

(63.55) + (32.065) + 4(15.99)

(63.55) + (32.065) + 63.96

= 159.575 u

Answer:

Highest wavelength : radio waves

So lowest energy: radio waves

Hence order is:

radio waves < microwaves < IR waves < visible light < ultraviolet radiation < X-rays < gamma rays

The alkali metals can't exist alone in nature because of incomplete outermost shell of alkali metals.

The alkali metals have the high thermal and electrical conductivity. It has high lustre, ductility, and malleability as compared to other materials. Each alkali metal atom has one electron in its outermost shell which make more reactive.

So we can conclude that the alkali metals can't exist alone in nature because of incomplete outermost shell of alkali metals.

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Answer:

both particles and waves

Explanation:

this is known as wave-particle duality.

I hope this helps.

Have a nice day.