Why do precipitation reactions occur?

Answer:

A 33.7L

Explanation:

Hello,

In this case, we can deal with argon as an ideal gas that can be studied via the ideal gas equation:

[tex]PV=nRT[/tex]

Whereas we have the pressure, volume, moles, ideal gas constant and temperature respectively, so, for us to find the volume we simply solve for it as shown below:

[tex]V=\frac{nRT}{P} =\frac{3.5mol*0.082\frac{atm*L}{mol*K} *293K}{2.5atm} \\\\V=33.7L[/tex]

Therefore, the answer is A 33.7L.

Best regards.

Answer:

Any type of movement

Explanation:

All muscles are used for any way of movement in the body.

Answer:

I'm assuming you're talking about something like a regular housekey, in which case there are numerous things you can describe!

Its mass: how much it weighs, times the gravity of the system.

Its color: is it silver-colored, or gold, etc.?

Its volume: you could probably calculate this, though it would be hard because it's not a traditional shape, I assume.

Its density: this is mass/volume. It means how many of the atoms are in a given space; how tightly packed the atoms are.

Its tendency to rust / its specific combination of metals or alloys: is it made of copper, tin, steel.. and these are all things that can rust to varying degrees.

Answer:

Soil contains minerals such as Iron, Zinc, Nitrogen compounds, etc. that are all essential to sustaining life. It also holds water and makes it available for plants to use. Soil also contains ores from which we can extract metals such as iron, copper, gold, and aluminum.

(Hope this helps) Sky

Answer: [tex]15.5^0C[/tex]

Explanation:

According to ideal gas equation:

[tex]PV=nRT[/tex]

P = pressure of gas = 0.987 atm

V = Volume of gas = 12 L

n = number of moles = 0.50

R = gas constant =[tex]0.0821Latm/Kmol[/tex]

T =temperature =  ?

[tex]T=\frac{PV}{nR}[/tex]

[tex]T=\frac{0.987atm\times 12L}{0.0820 L atm/K mol\times 0.50mol}=288.5K=(288.5-273)^0C=15.5^0C[/tex]

Thus the temperature of a 0.50 mol sample of a gas at 0.987 atm and a volume of 12 L is [tex]15.5^0C[/tex]

Answer: h = 1/3VA

Explanation:

V = 1/3Ah

3AhV = 1

h = 1/3VA

Answer:

Corona

Explanation:

Is the answer so yeah...

Answer:

increase when the distance between two objects increases

Explanation:

when the objects move further apart, the gravitational pull between them becomes weaker, and so the gravity isn't as strong. all of the other options increase gravity

Answer:

C) Ar-37

Explanation:

A positron is a positively charged electron. It has the same mass as that of an electron, but opposite charge. It is the counterpart of an electron.

The reaction involving the emission of a positron by k-37 would produce a Ar-37, which is an unstable isotope of Argon. In this emission, there must not be a particle loss or creation, the addition of the mass number and proton number on LHS must be the sane as that on RHS of the equation.

An isotope is ability of an element to exist in two or more forms with the same atomic number but different mass number.

Answer:

I disagree with the student's claim

Explanation:

From basic chemistry, the rate of chemical reaction increases with an increased surface area.

This simply means that a powdered substance will react faster than a small pellet of the same substance.

Let us break this down further. The pellet has a smaller exposed surface per grain to the solvent, here is how. Imagine the powdered substance bunched up together to make the small pellet, grains at the center of the pellet is blocked by other grains around it, and will take time before it comes in contact with the solvent. For the powdered grains, each grain has a surface independently exposed to the solvent and can easily come in contact with the solvent, taking less time to react with the solvent.

Technically, a powdered substance has more exposed surface area and logically will take a shorter time for the reaction to be complete.

Answer:

Option B. 1 calcium, 2 oxygen, and 2 hydrogen

Explanation:

The number of each atoms present in Ca(OH)2 can be summarised as follow:

Calcium (Ca) = 1

Oxygen (O) = 2

Hydrogen (H) = 2

From the above illustration, we can see clearly that Ca(OH)2 contains 1 calcium, 2 oxygen and 2 hydrogen.

Answer:

1 calcium, 2 oxygen, and 2 hydrogen

1 calcium, 2 oxygen, and 2 hydrogen

1 calcium, 2 oxygen, and 2 hydrogen

1 calcium, 2 oxygen, and 2 hydrogen

1 calcium, 2 oxygen, and 2 hydrogen

1 calcium, 2 oxygen, and 2 hydrogen

1 calcium, 2 oxygen, and 2 hydrogen

XD

Explanation:

Answer:

D... I think? Because it is unsaturated so there is more solute than solvent...

Answer:

C is the excess reactant.

Explanation:

Reaction is C + O2 --> CO2

1mol of C required to react with 1mol O2

Therefore 15 - 10 = 5moles of C will be in excess

Answer:

Ba

Explanation:

Let us consider the electrode potential of one of the options listed in the question,

Ba2+(aq) + 2 e- -----> Ba(s). -2.90V

It is very important to recall that a metal can only displace another metal from aqueous solution if that metal has a more negative reduction potential that the metal it displaced. This implies that if there are two metals A and B, A can only displace B from an aqueous solution of B if A has a more negative reduction potential than B.

The reduction potential of Mg^2+ is -2.37V. This is less negative than that of Ba^2+ which is -2.90V. Hence barium can reduce Mg^2+ to metallic Mg.

Answer: 0.024 ml of hydrogen gas are collected at [tex]18.5^0C[/tex] and 755.5mmHg in this single replacement reaction

Explanation:

To calculate the moles :

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

[tex]\text{Moles of} Ba=\frac{85.0g}{137g/mol}=0.620moles[/tex]

To calculate the number of moles for given molarity, we use the equation:

[tex]\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution in ml}}[/tex]  

[tex]3.55M=\frac{\text{Moles of} HCl\times 1000}{275ml}\\\\\text{Moles of }HCl=\frac{3.55\times 275}{1000}=0.976mol[/tex]

The balanced chemical reaction is:

[tex]Ba+2HCl\rightarrow BaCl_2+H_2[/tex]

According to stoichiometry :

2 moles of [tex]HCl[/tex] require = 1 mole of [tex]Ba[/tex]

Thus 0.976 moles of [tex]HCl[/tex] will require=[tex]\frac{1}{2}\times 0.976=0.488moles[/tex] of [tex]Ba[/tex]

Thus [tex]HCl[/tex] is the limiting reagent as it limits the formation of product and [tex]Ba[/tex] is the excess reagent.

As 2 moles of [tex]HCl[/tex] give = 2 moles of [tex]H_2[/tex]

Thus 0.976 moles of [tex]HCl[/tex] give =[tex]\frac{2}{2}\times 0.976=0.976moles[/tex]  of [tex]H_2[/tex]

According to ideal gas equation:

[tex]PV=nRT[/tex]

P = pressure of gas = 755.5 mmHg = 0.994 atm   (760 mm Hg = 1 atm )

V = Volume of gas in L = ?

n = number of moles = 0.976

R = gas constant =[tex]0.0821Latm/Kmol[/tex]

T =temperature =[tex]18.5^0C=(18.5+273)K=291.5K[/tex]

[tex]V=\frac{nRT}{P}[/tex]

[tex]V=\frac{0.994atm\times 0.0820 L atm/K mol\times 291.5K}{0.994atm}=24.0L=0.024ml[/tex]    (1L=1000ml)

Thus 0.024 ml of hydrogen gas are collected at [tex]18.5^0C[/tex] and 755.5mmHg in this single replacement reaction

Answer:

LiOH

Explanation:

Among the following LiOH or lithium hydroxide is a Arrhenius base as it increase hydroxide ion concentration of a substrate.

According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.

Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.

They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.

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Answer:

These are called cis-but-2-ene (where the groups are on the same side) or trans-but-2-ene (where they are on opposite sides). Cis-but-2-ene is also known as (Z)-but-2-ene; trans-but-2-ene is also known as (E)-but-2-ene. For an explanation of the two ways of naming these two compounds, follow the link in the box below.

Explanation:

Answer: The molarity of the diluted solution be 0.10 M

Explanation:

According to the dilution law,

[tex]C_1V_1=C_2V_2[/tex]

where,

[tex]C_1[/tex] = concentration of concentrated solution = 0.15 M

[tex]V_1[/tex] = volume of concentrated solution = 100 ml

[tex]C_2[/tex] = concentration of diluted solution= ?

[tex]V_2[/tex] = volume of diluted solution= 150 ml

Putting the values we get:

[tex]0.15\times 100=M_2\times 150[/tex]

[tex]M_2=0.10M[/tex]

Thus the molarity of the diluted solution be 0.10 M

Answer:

Magnesiumoxide

Explanation:

I don't know

Answer:

the other one is correct...

a. oxidized

b. reducing agent

Explanation:

edge 2021 just did it

The sodium in the given reaction is oxidized from Na to Na⁺.

Oxidation can be described as a process that involves the addition of oxygen or an electronegative element or the removal of hydrogen atoms or any electropositive element. Oxidation can be defined as the reaction in which an atom or ion loses its electrons.

The reduction can be defined as a reaction that involves the addition of hydrogen or the removal of oxygen or any electronegative element. The reduction can also be defined as the reaction in which an atom or ion gains electrons.

In the given chemical reaction of the formation of NaCl:

[tex]2Na + Cl_2\longrightarrow 2NaCl[/tex]

In this chemical reaction the sodium is oxidized as shown below:

[tex]Na\longrightarrow Na^+ +e^-[/tex]

In this chemical reaction the Chlorine is reduced as shown below: [tex]Cl_2 +2e^-\longrightarrow 2Cl^-[/tex]

Therefore, sodium is oxidized in the given reaction.

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Answer:

A molecule of sucrose (C12H22O11) has 12 carbon atoms, 22 hydrogen atoms and 11 oxygen atoms. The subscripts also indicate the ratios of the elements.

Explanation:

This is because it has the abbreviation of the Carbon atoms, Hydrogen atoms, and Oxygen atoms are right before the number.

The number of molecules of sugar is required.

The number of molecules is [tex]2.2\times 10^{23}\ \text{molecules}[/tex]

m = Mass of sugar = 125 g

[tex]N_A[/tex] = Avogadro's number = [tex]6.022\times 10^{23}\ \text{mol}^{-1}[/tex]

Molar mass of sugar

[tex]M=C_{12}H_{22}O_{11}=12\times 12+1\times 22+16\times 11\\\Rightarrow M=342\ \text{g/mol}[/tex]

Number of moles is

[tex]n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{125}{342}\\\Rightarrow n=0.365\ \text{mole}[/tex]

Number of molecules is

[tex]N=N_An\\\Rightarrow N=6.022\times 10^{23}\times 0.365\\\Rightarrow N=2.2\times 10^{23}\ \text{molecules}[/tex]

The number of molecules is [tex]2.2\times 10^{23}\ \text{molecules}[/tex]

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Answer:

the smallest thing in the world

Explanation:

Answer:

It is the smallest particle of the elements that exists ob the earth

Answer:

16.89 atm.

Explanation:

Step 1:

Data obtained from the question

Number of mole (n) = 2.3 mol

Temperature (T) = 40°C = 40°C + 273 = 313K

Volume (V) = 3.5L

Pressure (P) =..?

Gas constant (R) =0.0821 atm.L/Kmol

The pressure exerted by the gas can be obtained by using the ideal gas equation as shown below:

PV = nRT

Divide both side by V

P = nRT /V

P = 2.3 x 0.0821 x 313 / 3.5

P = 16.89 atm.

Therefore, the pressure exerted by the gas is 16.89 atm.

Answer:

3.33 tanques de O₂

Explanation:

Basados en la reacción:

2C₂H₂(g) + 5O₂(g) → 4CO₂(g) + 2H₂O(g)

2 moles de acetileno reaccionan con 5 moles de oxígeno produciendo 4 moles de dióxido de carbono y 2 moles de agua

La ley de Avogadro dice que el volumen de un gas bajo temperatura y presión constantes es proporcional a las moles de este gas. Así, como 2 moles de acetileno reaccionan con 5 moles de oxígeno, los litros de O₂ necesarios para quemar 9340L de acetileno son:

9340 L C₂H₂ × (5 moles O₂ / 2 moles C₂H₂) = 23350L de O₂

Si un tanque contiene 7x10³ L de O₂ serán necesarios:

23350L O₂ ₓ (1 tanque / 7x10³L) = 3.33 tanques de O₂

Answer:

Some humans are randomly immune to malaria or have increased bone density due to random beneficial mutations.

Explanation:

Answer: one that changes the color of a rabbit, allowing it to hide from predators.

Explanation:Hey give me brainliest award need it

Answer:

If 500.0 mL of 0.450 M sodium phosphate is reacted with an excess of iron (II) nitrate solution, how many grams of iron (II) phosphate are produced?

idk

Explanation:

Answer:

164.2726 g

The ratio in the equation is 3:1 so the limit reaction ratio is 3:1 therefore,  0.392456 mol of were reaction.

Brainlist pls!

Answer:

The function of DNA is to store all of the genetic information that an organism needs to develop, function, and reproduce. Essentially, it is the biological instruction manual found in each of your cells. The instructions in DNA are written in a simple alphabet that has just four letters—A, T, C, and G.

Explanation:

Answer:

It is ABD

Explanation:

Answer:

300mL

Explanation:

To obtain the volume of water added, let us calculate the volume of the diluted solution.

Data obtained from the question include:

Molarity of stock solution (M1) = 0.15mol/L

Volume of stock solution (V1) = 600mL

Molarity of diluted solution (M2) = 0.1mol/L

Volume of diluted solution (V2) =..?

The volume of the diluted solution can be obtained as follow:

M1V1 = M2V2

0.15 x 600 = 0.1 x V2

Divide both side by 0.1

V2 = 0.15 x 600 / 0.1

V2 = 900mL.

Therefore the volume of the diluted solution is 900mL.

Finally, we can obtain the volume of the water added by calculating the difference in the volume of the diluted solution and that of the stock solution. This is illustrated below:

Volume of stock solution (V1) = 600mL

Volume of diluted solution (V2) = 900mL

Volume of water added =...?

Volume of water added = V2 – V1

Volume of water added = 900 – 600

Volume of water added = 300mL

Therefore, the volume of water added is 300mL