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Answer:

Fishes undergo both asexual and sexual mode of reproduction with majority of fishes reproducing by sexual mode

Explanation:

Fishes undergo sexual reproduction. The sperm from the male fuses with the eggs of females. Some of the fishes have separate female and male sexes while some are hermaphrodites and have both testes and ovaries. Some species of fishes reproduce through parthenogenesis in which female egg develops into baby fishes without fusing with a sperm cell. Due to this, the offspring are exact copies of their mothers

Yes, igneous rock become sedimentary rock through a process called sedimentation.

In sedimentation, An igneous rock is broken down or crushed into little piece of rock called sediment, the sediment is then packed together as a result of othe rocks or strong forces, that form together to make a Sedimentary rock.

Conclusively, The process of erosion, heat and depositing rock grains which can also be known as sedimentation can alter or change igneous rock into sedimentary rock.

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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:

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: 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:

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:

1.2cm

97.8mm

7cm

Answer:

The H+ (aq) concentration of the resulting solution is 4.1 mol/dm³

(Option C)

Explanation:

Given;

concentration of HA, [tex]C_A[/tex] = 6.0mol/dm³

volume of HA, [tex]V_A[/tex]  = 25.0cm³, = 0.025dm³

Concentration of HB, [tex]C_B[/tex] = 3.0mol/dm³

volume of HB, [tex]V_B[/tex] = 45.0cm³ = 0.045dm³

To determine the H+ (aq) concentration in mol/dm³ in the resulting solution, we apply concentration formula;

[tex]C_iVi = C_fV_f[/tex]

where;

[tex]C_i[/tex] is initial concentration

[tex]V_i[/tex] is initial volume

[tex]C_f[/tex] is final concentration of the solution

[tex]V_f[/tex] is final volume of the solution

[tex]C_iV_i = C_fV_f\\\\Based \ on \ this\ question, we \ can \ apply\ the \ formula\ as;\\\\C_A_iV_A_i + C_B_iV_B_i = C_fV_f\\\\C_A_iV_A_i + C_B_iV_B_i = C_f(V_A_i\ +V_B_i)\\\\6*0.025 \ + 3*0.045 = C_f(0.025 + 0.045)\\\\0.285 = C_f(0.07)\\\\C_f = \frac{0.285}{0.07} = 4.07 = 4.1 \ mol/dm^3[/tex]

Therefore, the H+ (aq) concentration of the resulting solution is 4.1 mol/dm³

Answer:

the smallest thing in the world

Explanation:

Answer:

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

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:

950mL

Explanation:

The following were Data were obtained from the question:

Initial volume (V1) = 100mL

Initial pressure (P1) = stp = 760mmHg

Final pressure (P2) = 80mmHg

Final volume (V2) =..?

The final volume of the gas can be obtained by using the Boyle's law equation as follow:

P1V1 = P2V2

760 x 100 = 80 x V2

Divide both side by 80

V2 = (760 x 100) /80

V2 = 950mL

Therefore, the new volume of the gas is 950mL

Answer:

call an vet ASAP 10 pounds of chocolate is very bad for a dog.

Explanation:

Chocolate is one of the worst things a dog can eat, and 10 pounds of it is worst! Take your dog to the vet IMMEDIATELY! I hope that that the dog will survive.

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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:

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

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:

It means that in any interaction where external impulses don't occur, the momentum of the system remains the same before and after the interaction. When a cannonball is fired, its momentum does change.

Answer:

b

Explanation:

Ethyne  will contain the strongest bond between the two carbon atoms as  the triple bonds are the strongest.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

a. overuse of resources is the correct answer.

Explanation:

Renewable resources are available and they are abundant but overuse of these renewable resources will have a negative effect on the surroundings and humans.

Overuse of renewable resources will leads to the depletion of these renewable sources in the future and will also make the ecosystem unbalance.

Renewable resources are solar energy, geothermal energy, biomass energy, wind energy, hydro energy.

Thus renewable resources are threatened due to overuse and it must be carefully used.

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:

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:

Corona

Explanation:

Is the answer so yeah...

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

Explanation:

The molecules of solids are shrinked in there normal state . but as a heat energy is produced , the molecules starts curating fast and fast as temperature goes up . since they vibrate , they hit and collide each other breaking the bondings this increases the surface of area of the solid , and molecules consumes that space and they expand .

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:

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

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 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:

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