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Explanation:

To convert moles to particles or grams to particles, let us have a firm understanding of what a mole is.

A mole is the unit of measuring quantity of particles.

It is the amount of substance that contains the Avogadro's number of particles.

The particle can be atoms, molecules, formula units, electrons, protons, neutrons, etc.

 So, to convert from moles to particles;

    1 mole of a substance  contains 6.02 x 10²³ particles

To convert from grams to particles;

  First convert to moles;

        number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

  So,    1 mole of a substance  contains 6.02 x 10²³ particles

Answer:

[tex]\Delta H_{dep}=-46.68kJ/mol[/tex]

Explanation:

Hello!

In this case, since vaporization is the processes by which a liquid goes to the gas phase, fusion by which a solid goes to liquid and deposition by which a gas goes to solid; we infer that the following set up relates the enthalpies associated to each process:

[tex]\Delta H_{fus}+\Delta H_{vap}=-\Delta H_{dep}[/tex]

Because deposition goes from a state with more energy to a state with less energy, therefore it is negative; in such a way, by plugging in we obtain:

[tex]\Delta H_{dep}=-(\Delta H_{fus}+\Delta H_{vap})\\\\\Delta H_{dep}=-(6.01kJ/mol+40.67kJ/mol)\\\\\Delta H_{dep}=-46.68kJ/mol[/tex]

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Answer:

C. C and Pb

Both are in group IV elements.

Answer : The net ionic equation will be,

[tex]2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)[/tex]

Explanation :

In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The given balanced ionic equation will be,

[tex]2FeCl_3(aq)+3Mg(s)\rightarrow 3MgCl_2(aq)+2Fe(s)[/tex]

The ionic equation in separated aqueous solution will be,

[tex]2Fe^{3+}(aq)+6Cl^{-}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+6Cl^{-}(aq)+2Fe(s)[/tex]

In this equation, [tex]Cl^{-}[/tex] is the spectator ion.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

[tex]2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)[/tex]

Answer:

1.1 liters

1.2 liters

1.5 liters

Explanation:

Precision in data refers to how close the experimental values of an experiment are to one another irrespective of the true or accepted value. In other words, a set of values are said to be PRECISE if they are close to one another.

In this case, data was collected after conducting an experiment about the amount, in liters, of water a specific plant needs per month. However, according to the set of experimental values provided, only 1.1 litres, 1.2litres and 1.5litres are close to one another and, hence, are said to be PRECISE even if they are not close to the accepted value of 6litres.

Answer:

1.1 liters

1.2 liters

1.5 liters

Explanation:hope you do good in edge

Answer:

The answer would be ice, heat, water, and wind. (Hope this helps).

Answer:

the last four options

ice

heat

water

wind

Explanation:

edg2020

Answer:

Reaction rate

Explanation:

We are told that Ben observes how quickly some dry wood is burning in a campfire.

This is an example of reaction rate because it tells us the speed i.e. how fast the dry wood is reacting with the camp fire.

Explanation:

they are closer and made of gas

Answer:

number 7 is GROWTH

number 8 is TARGET CELLS

number 9 is pituitary gland

This is displacement reaction.

Answer:

a) 0.018 ft^3

b) 55.55 lb/ft^3

Explanation:

given that mass m = 2 lb

volume = 62.6 in^3

= 0.036 ft^3

now, specific volume  = volume/mass  [specific volume is the reciprocal of density]

=0.036/2 = 0.018 ft^3.

b) density = mass/ volume = 2/0.036 = 55.55 lb/ft^3

Answer:

a. 0.528 M ..

Explanation:

Hello!

In this case, since the given by-mass percent can be written as:

[tex]\frac{10gCdSO_4}{100g\ sol}[/tex]

By using the density and molar mass of the solute, cadmium sulfate, we can compute the molarity, by also making sure we convert from mL to L of solution:  

[tex]M=\frac{10gCdSO_4}{100g\ sol}*\frac{1molCdSO_4}{208.46gCdSO_4} *\frac{1.10g\ sol}{1mL\ sol} *\frac{1000mL\ sol}{1L\ sol} \\\\M=0.528M[/tex]

Thereby, the answer is a. 0.528 M .

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Answer:

#1 Atom

Oxygen

Charge neutral atom

#2 ion

Oxide ( oxygen anion)

Charge 2-

Formula O2-

#3 Atom

Flourine

Neutral atom no charge

#4 atom

Flourine

Neutral atom no charge

#5 ion

Sulphide

Charge 2-

S2-

#6 ion

Chloride Cl-

Charge -1

#7 atom

Chlorine

No Charge neutral

#8 ion

Calcium ion cation

Charge 2+

Ca++

#9 atom

Hydrogen (protium)

No charge neutral

#10 atom

Hydrogen (deutrium)

No charge neutral

#11 ion

Proton H+

Charge +1

#12 atom

Helium

No charge neutral atom

Explanation:

To find charge we need difference in proton and electron if proton are equal to electron then this is neutral atom

If electron are more this is negative charge ion

For example in oxygen 8 proton and 10 electron its charge is negative 2

If proton are more this is positive charge ion

For example in calcium 20 proton and 18 electron positive ion is formed.

According to the picture, the name of each element along with its charge and chemical symbol is as follows:

A chemical element may be defined as the characteristics of atoms that possess a given number of protons in their nuclei, along with the number of neutrons including the pure substance typically consisting only of that species.

Therefore, according to the picture, the name of each element along with its charge and chemical symbol is well mentioned above.

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Answer:

1) chloroplast

A chloroplast is an organelle within the cells of plants and certain algae that is the site of photosynthesis, which is the process by which energy from the Sun is converted into chemical energy for growth.

2)Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

3)i need the photo to answer

Explanation:

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Explanation:

1 miole of Fe2O is 6.22 × 10^-23

5mole of Fe2O = 5×6.22×10^-23

=31.1×10^-23

Mass of 5 moles  of [tex]Fe_2O[/tex] is 636 g.

Formula for the calculation of mass is as follows:-

[tex]Number\ of\ mole=Mass/Molar mass[/tex].......(1)

The molar mass of [tex]Fe_2O[/tex]is [tex]2\times55.6\ g+16\ g=127.2 \g[/tex]

So ,the mass of 5 moles  of [tex]Fe_2O[/tex]is as follows:-

[tex]5\ mol=Mass/127.2\ g/mol\\5\ mol/times127.2\ g/mol=Mass\\636\ g=Mass[/tex]

Hence, the mass of 5 moles  of [tex]Fe_2O[/tex] is 636 g.

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Answer:

A

Explanation:

just took the test and it’s right

The action that best describes chemical weathering is water carving out a limestone cave.

CHEMICAL WEATHERING:

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Answer:

1. Litres

2. minutes

3. Kelvin (K)

4. Kilometer/hour

5. hours

6. Litre

7. metre

8. metre

9. Litres

10. milliliters

Explanation:

1. Coca-Cola is a liquid substance, hence, its volume must be measured in LITRES.

2. This question is related to time I.e. being early, hence, the unit of measurement is MINUTES.

3. The unit of temperature is Kelvin (K). Therefore, water boils at 373K

4. This question is related to speed, whose unit of measurement is kilometer/hour (km/hr).

5. A movie runs with time, which is measured in HOURS.

6. Mineral water is a liquid, which can only be bought per volume. Hence, the appropriate unit is LITRE.

7. Height is measured in metres (m). Therefore, one can say that " the height of your younger brother is 10metres"

8. The length of a substance is also measured in metres.

9. Volume is measured in LITRES

10. Cough syrup is a drug whose volume is quantified by millilitres i.e. a thousandth litre

Answer:

protons are red neutrons are green electrons are yellow

Explanation:

TIE FIGHTERS GO ZOOOOOM

Answer:

a. CO2 and H20

Explanation:

Chemically, this combustion process consists of a reaction between methane and oxygen in the air. When this reaction takes place, the result is carbon dioxide (CO2), water (H2O), and a great deal of energy. The following reaction represents the combustion of methane:

CH4[g] + 2 O2[g] -> CO2[g] + 2 H2O[g] + energy

One molecule of methane, (the [g] referred to above means it is gaseous form), combined with two oxygen molecules, react to form a carbon dioxide molecule, and two water molecules usually given off as steam or water vapor during the reaction and energy.

Answer:

Stamen

Explanation:

Answer:

stamen

Explanation:

The stamen is the male reproductive organ. It consists of a pollen sac (anther) and a long supporting filament.

A precipitate is a solid that sometimes forms when two liquids combine.

A. True

A precipitate is a solid that sometimes forms when two liquids combine.

A. True

B. False

A. True

Answer:

Specific heat of metal of the metal is 0.8394J/g°C

Explanation:

The heat the water gain is the same losing for the metal. The equation is:

m(Metal)*ΔT(Metal)*S(Metal) = m(Water)*ΔT(Water)*S(Water)

Where m is mass: 66.0g water and 28.5g Metal

ΔT is change in temperature: (95.25°C-27.84°C) = 67.41°C for the metal and (27.84°C - 22.00°C) = 5.84°C for the water

And S is specific heat of water (4.184J/g°C) and the metal

Replacing:

28.5g*67.41°C*S(Metal) = 66.0g*5.84°C*4.184J/g°C

S(Metal) = 0.8394J/g°C

Answer:

That is sodium

Explanation:

Sodium is found there

Answer:

IAM at exam sorry that's why I can't answer

United States

The jet stream is oriented from west to east across the southern portion of the United States, during El Niño. Although El Niño's strongest impacts are felt around the equatorial Pacific, they can affect weather around the world by influencing high and low pressure systems, winds and precipitation. And as the warmer ocean waters release excess energy (heat) into the atmosphere, global temperatures rise.

During La Niña, the jet stream and severe weather are likely to be farther north. It refers to the periodic cooling of sea-surface temperatures across the east-central equatorial Pacific.

El Niño and La Niña result from interaction between the surface of the ocean and the atmosphere in the tropical Pacific. Changes in the ocean impact the atmosphere and climate patterns around the globe. In turn, changes in the atmosphere impact the ocean temperatures and currents.

The region chosen is United States and the southern tier of Alaska and the U.S. Pacific Northwest tends to be warmer than average during El Niño and La Niña.

This is defined as the average weather condition of a place over a given period of time.

The  U.S.southern tier of state also tends to be cooler during this period which makes it the most appropriate choice.

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Answer:

It's I, II, and III

Explanation:

Trust me.

Answer:

1.38x10⁻⁴ M

Explanation:

First, we calculate the pOH of the solution, using the given pH:

Now we calculate the concentration of OH⁻, using the pOH:

Following the reaction Ca(OH)₂ → Ca⁺² + 2OH⁻, we divide [OH⁻] by 2 to calculate [Ca(OH)₂]:

The concentration of the calcium hydroxide in the solution is 1.38 * 10⁻⁴ M

pH is calculated using the expression:

[tex]pH = - log [H_3O^+][/tex]

Given:

pH of the solution = 10.44

[tex]pOH = 14 - pH\\\\pOH = 14 - 10.44\\\\pOH = 3.56[/tex]

[tex]pOH = -log[OH^-]\\\\[OH^-] = 2.75* 10^{-4} M[/tex]

Ca(OH)₂ → Ca⁺² + 2OH⁻

The concentration of OH⁻ is then divided by 2 according to the given reaction.

[tex][Ca(OH)_2] = \frac{2.75*10^{-4}M}{2}\\\\[Ca(OH)_2] = 1.38*10^{-4}M[/tex]

Thus, the concentration of the calcium hydroxide in the solution is 1.38 * 10⁻⁴ M.

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Answer:

Explanation:

Silicon, phosphorus, sulphur, and chlorine oxides are acidic

Sodium oxide, which reacts with water to produce sodium hydroxide. Magnesium oxide, which reacts with hydrochloric acid to form magnesium chloride. Copper(II) oxide, which reacts with nitric acid to form copper nitrate are basic.