Calculate the grams of solute required to make 250 mL of 0. 10% magnesium phosphate (m/v)

Answer:

Explanation:

Reduction potential of Copper metal is .34 V and reduction potential of Calcium is - 2.87 V . So copper will not be able to reduce Calcium chloride to calcium . Hence no reaction will take place when a piece of copper metal is placed in calcium chloride solution .

Theoretical mass (O₂)= H₂O₂ Volume×  H₂O₂ density× {( 1 mol O₂)/(2 mol H2O2)}×{( mol of  H₂O₂ /g  H₂O₂ )}

H2O2 Volume= 5 ml

Known density( H₂O₂ )= 1.02 g/ml

Molar mass ( H₂O₂ )= 34.01 g/mol

Reciprocal molar mass(  H₂O₂ )= 0.0294

Theoretical mass( O₂)= 5×1.02× 0.0294× 1/2= 0.0749 moles

Actual moles of O₂ and percentage of  H₂O₂

P= 753 mm Hg×1 atm/760 mm Hg= 0.991 atm

V= 45  ml× 1L /1000 ml= 0.045 L

n= PV/RT

Actual moles ( O₂)= (0.991×0.045)/(0.0821×296 K)= 0.0445/24.3016= 1.8×10^-3 moles

Percentage ( H₂O₂ )= Theoretical moles(O₂)×100= 0.0749×100= 7.49%

Mass of  H₂O₂ (percent)= 3%

Concentration by mass( H₂O₂ )= 3 gm H2O in 100 ml of H2O

Volume ( H₂O₂ )= 100 ml

1 mol ( H₂O₂ )= 34.02 g O2

(3g  H₂O₂ /100 ml Solution)×( 1 mol  H₂O₂ /34.02 g H2O2)

No. Of moles ( H₂O₂ )= 0.088 moles

Mass ( H₂O₂ )= 0.088 moles × 34.02 = 2.99 g

%  H₂O₂ = (2.99 g  H₂O₂ /100 ml Solution)×100= 2.99%

% error= (%  H₂O₂ from the bottle-experiment %  H₂O₂ )/(% H₂O₂ from bottle)×100

=[ (3-2.99)/(3) ]× 100= 0.34% error.

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Simple diffusion and facilitated diffusion are both similar types of phenomenon.

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False. Photoautotrophs are not the only organisms capable of carbon fixation. Other autotrophs and some heterotrophs can also fix carbon dioxide into biomolecules, and industrial processes also involve carbon fixation.

While photoautotrophs, which are organisms that use light energy and carbon dioxide to produce organic compounds, are capable of carbon fixation, they are not the only organisms that can do so. Other autotrophs, such as chemoautotrophs, which derive energy from inorganic compounds, and some heterotrophs, which obtain energy by consuming other organisms, can also fix carbon dioxide into biomolecules. Additionally, many industrial processes, such as the Haber-Bosch process, involve the fixation of carbon dioxide as a key step. Therefore, while photoautotrophs play an important role in carbon fixation in the biosphere, they are not the only organisms capable of this process.

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Answer:

The second option

Answer:

Intent to cause harm

Answer:

heymate !

Explanation:

The air pressure is higher at sea level and lower at higher altitudes ( top of the mountain ) .

This is because as we go higher and higher the air in the surroundings become thinner and thinner. And this does not suit you as your blood pressure at high altitudes are comparatively higher compared to the pressure around you at the top of the mountains .

And that is why some of us face breathing issues or nose bleeding due to the imbalance in the atmosphere .

And as we go lower below the sea level the pressure of air around us increases.

And that is why swimmers were tough suits while going down below the sea level, so that their bodies don't get crushed under the extreme pressure on the bottom of the sea .

There are also chances of the skull to get crushed if we don't were the suit while we are under he sea .

hope it would help !

Amount of heat energy that is required to heat 906 g of ice to steam is 530952 Joules.

Explanation:

Given:

Amount of transferred energy = Q =?

Mass of ice (water) = m = 906 g

Initial temperature of ice = T(i) = -22° C

Final temperature of steam = T(f) = 118°C

Formula for Heat capacity is given by

Q = m×c×Δt ........................................(1)

where:

Q = Heat capacity of the substance (in J)

m=mass of the substance being heated in grams(g)

c = the specific heat of the substance in J/(g.°C)

Δt = Change in temperature (in °C)

Δt = (Final temperature - Initial temperature) = T(f) - T(i)

                                                                          = 118 - (-22) = 140°C

Specific heat of water is c = 4.186 J /g. °C

Substituting these in equation (1), we get

Q = m×c×Δt

   = 906 × 4.186 × 140

   = 530952.24 J

The heat energy required is equal to 530952.24 Joules ≅ 530952 Joules.

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The expanded volume of the gas can be find out using Boyle's law. The final volume of the gas is calculated as 1300 ml.

According to Boyle's law, at constant temperature, the volume of a gas is inversely proportional to the pressure of the gas. Thus the expression for this law can be written as :

PV = a constant.

If we have initial volume and pressure V₁ and P₁ respectively and the final volume and pressure V₂ and P₂ respectively, then the relation is:

P₁ V₁ = P₂  V₂.

It is given that the initial volume and pressure of gas are 725 ml and  0.970 atm. The final pressure is 0.541 atm. Then the final volume of the gas is calculated as follows:

V₂ = P₁ V₁ /  P₂

    = (0.970 atm × 725 ml) / 0.541 atm

    = 1300 ml.

Hence, the final volume of the gas is 1300 ml.

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Steel ball bearings and marbles can be separated through manual sorting due to their difference in appearance.

Before answering the question, let us define the given choices.

The given separation techniques are not suitable for the separation of steel balls bearings, and marbles. Instead, the sorting separation technique must be used. This is used for manually sorting coarse materials based on their physical characteristic, which in this case is their difference in appearance.

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The correct option to calculate the pH of the solution is B. pH=4.76+log(0.0200/0.0750)=4.19.

To calculate the pH of the solution, we need to consider the reaction between CH3COOH (acetic acid) and NaOH (sodium hydroxide). The reaction results in the formation of water (H2O) and the sodium acetate (CH3COONa) salt. Acetic acid is a weak acid that partially dissociates in water.

By mixing 500 mL of 0.150 M CH3COOH(aq) and 0.0200 mol of NaOH(s), we can calculate the concentration of the remaining acetic acid after the reaction using stoichiometry. The remaining acetic acid concentration is found to be 0.0750 M.

To determine the pH of the solution, we can use the Henderson-Hasselbalch equation, which relates the pH of a weak acid solution to the pKa and the ratio of the concentration of the acid to its conjugate base. In this case, the acetic acid acts as the weak acid and its conjugate base is the acetate ion.

Using the Henderson-Hasselbalch equation with the given values, we obtain a pH of 4.19.

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Answer:

100%

Explanation:

Cell is the structural and functional unit of life. Without Cell, an organism can never be created.

Answer:

The cell is part of the organism

Explanation:

Cells are included in that organism which are also part of the cell theory. They work together with the DNA and nucleus to help the organism.

Answer: in 25 yards there is 75 feet. Witch is the same to say that 25 yards is 75 feet.

Explanation:

Answer:

25yd is bigger

Explanation:

When using the Bindex software, it's essential to set the units for height and weight to "US" instead of metric. This will ensure that the measurements are displayed in feet and inches for height and pounds for weight, which is the preferred format in the United States.

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The transition state in a chemical process is where the energy level is at its highest. The activation energy is the name given to this force. When two or more molecules are combined, collisions will occur.

They will react and produce new molecules if they strike with sufficient energy to pass through the transition state. The kinetics of a reaction are determined by the activation energy, the greater the energy hill, the slower the process. Energy is needed to form bonds, and energy is released when bonds are broken. In one reaction energy profile, the transition state is at its greatest point. Energy increases before the transition stage, which suggests the transition state absorbs energy.

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-23 is the final answer beacuse bigger negavtives

The term that refers to the tendency for a chemical to become a vapor is volatility. Volatility describes how easily a substance can evaporate or become a gas at room temperature.

A highly volatile substance will readily release its molecules into the air, while a less volatile substance will remain in a liquid or solid state. The level of volatility can affect the potential for exposure to a chemical, as volatile compounds can be inhaled and can enter the body through the respiratory system. It is important to consider the volatility of a substance when assessing its potential impact on human health and the environment.

Factors that influence a chemical's volatility include temperature, pressure, and molecular structure. In contrast, latency, persistence, and toxicity are unrelated terms that describe different aspects of a chemical's behavior and impact.

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The first chemical step in the breakdown of triacylglycerols is the hydrolysis of triacylglycerols into fatty acids and glycerol.

The breakdown of triacylglycerols, also known as lipolysis, involves several steps. The first chemical step in this process is the hydrolysis of triacylglycerols into fatty acids and glycerol. This step is catalyzed by an enzyme called lipase.

Lipase breaks the ester bonds between the fatty acids and the glycerol molecule, resulting in the release of free fatty acids and glycerol. This initial breakdown step occurs in various tissues, including adipose tissue and the liver.

The released fatty acids and glycerol can then be further metabolized to produce energy or used for other cellular processes.

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The first chemical step in the breakdown of triacylglycerols is complete hydrolysis to fatty acids and glycerols, which is in option D as Triacylglycerols, also known as triglycerides, are a type of lipid molecule composed of a glycerol molecule bonded to three fatty acid molecules.

In the first chemical step of the breakdown of triacylglycerols, complete hydrolysis occurs. This means that all three ester bonds are cleaved, resulting in the release of three fatty acid molecules and one glycerol molecule. The hydrolysis reaction breaks the ester linkages through the addition of water molecules, with the hydrolytic enzymes (lipases) catalyzing the process.

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Answer:

one cell to regulate

Explanation:

hope it'll help you mark me as brainliest

Answer:

firstly:scientist communicate with each other to share what they learn

secondly; they question and check each other's work

Answer:

Forming a hypothesis

Explanation:

Cuz why not

Taking into account the definition of mass number, atomic number and charge of an atom, the number of protons and electrons of the isotope of chlorine named chlorine-35 is 17, while the number of neutrons is 18.

All atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them.

The atomic number indicates the number of protons that are present in the nucleus of an atom.

If the atom is electrically neutral, the positive charge of the protons is balanced by the negative charge of the electrons. That is, the number of protons in the nucleus is equal to the number of electrons in its orbitals, so that in a neutral atom the atomic number also indicates the number of electrons.

The mass number indicates the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus.

The atomic number of chlorine is 17, while the mass number of chlorine-35 is 35.

So, being a neutral atom, by definition of atomic number the amount of protons and electrons that the isotope of chlorine has is 17.

Finally, knowing the number of protons and the atomic mass of the isotope, the number of neutrons is calculated by:

35 =17 + number of neutrons

35 - 17 = number of neutrons

18= number of neutrons

In summary, the number of protons and electrons of the isotope of chlorine named chlorine-35 is 17, while the number of neutrons is 18.

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φ(g1 * g2) = eH = φ(g1) * φ(g2).

This completes the proof that φ: G → H is a group homomorphism.

By showing that the map φ preserves the group operation, we have demonstrated that it is a group homomorphism.

To prove that φ: G → H is a group homomorphism, we need to show that it preserves the group operation. In other words, for any two elements g1 and g2 in G, φ(g1 * g2) = φ(g1) * φ(g2), where * denotes the group operation in G, and * denotes the group operation in H.

Given that φ(g) = eH for all g ∈ G, where eH is the identity element in H, we can start the proof as follows:

Let g1, g2 ∈ G. We want to show that φ(g1 * g2) = φ(g1) * φ(g2).

Since φ(g) = eH for all g ∈ G, we have φ(g1) = eH and φ(g2) = eH.

Now, consider the product g1 * g2 in G. Applying φ to both sides, we have:

φ(g1 * g2) = φ(g1) * φ(g2).

Substituting the values of φ(g1) and φ(g2), we get:

φ(g1 * g2) = eH * eH.

Since eH is the identity element in H, the product eH * eH is simply eH.

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The actual volume of water measured out is 10.012 mL.

To determine the actual volume of water, we can use the density formula: density = mass/volume.

Rearranging the formula to solve for volume, we get: volume = mass/density.

Plugging in the given values, we get:

volume = 9.990 g / 0.9978 g/mL = 10.012 mL.

Therefore, the actual volume measured out is slightly greater than the nominal volume of 10 mL, likely due to the meniscus formed by the water at the top of the pipet. This highlights the importance of proper measurement techniques and accounting for sources of error in experimental measurements.

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Let's solve each question step by step:

To find the new pressure of the gas after compression, we can use Boyle's Law, which states that the product of the initial pressure and volume is equal to the product of the final pressure and volume:

P1V1 = P2V2

Given:

P1 = 1 atm (standard pressure)

V1 = 1.00 L (initial volume)

V2 = 473 mL = 0.473 L (final volume)

Using the formula, we can rearrange it to solve for P2:

P2 = (P1V1) / V2

P2 = (1 atm * 1.00 L) / 0.473 L

P2 ≈ 2.11 atm

Therefore, the new pressure of the gas after compression is approximately 2.11 atm.

To find the volume of the gas after the explosion, we can use the Combined Gas Law, which relates the initial pressure, volume, and temperature to the final pressure, volume, and temperature:

P1V1 / T1 = P2V2 / T2

Given:

P1 = 4.0 x 10^6 atm (initial pressure)

V1 = 0.050 L (initial volume)

P2 = 1.00 atm (final pressure)

T1 and T2 are not provided, so we assume the temperature remains constant.

Using the formula and rearranging it to solve for V2:

V2 = (P1V1 * T2) / (P2 * T1)

V2 = (4.0 x 10^6 atm * 0.050 L) / (1.00 atm * T1)

Since the temperature remains constant, T2 = T1, and we can simplify the equation:

V2 = (4.0 x 10^6 atm * 0.050 L) / (1.00 atm)

V2 = 2.0 x 10^5 L

Therefore, the volume of the gas after the explosion is 2.0 x 10^5 liters.

To find the volume of the gas when compressed to a pressure of 6.00 x 10^4 atm, we can again use Boyle's Law:

P1V1 = P2V2

Given:

P1 = 1 atm (initial pressure)

V1 = 2.00 L (initial volume)

P2 = 6.00 x 10^4 atm (final pressure)

Rearranging the formula to solve for V2:

V2 = (P1V1) / P2

V2 = (1 atm * 2.00 L) / (6.00 x 10^4 atm)

V2 ≈ 3.33 x 10^-5 L

Therefore, the volume of the gas when compressed to a pressure of 6.00 x 10^4 atm is approximately 3.33 x 10^-5 liters.

To find the new volume of the gas when the pressure is released from 2.0 x 10^6 atm to 0.275 atm, we can again use Boyle's Law:

P1V1 = P2V2

Given:

P1 = 2.0 x 10^6 atm (initial pressure)

P2 = 0.275 atm (final pressure)

V1 = 1.0 x 10^-5 L (initial volume)

Rearranging the formula to solve for V2:

V2 = (P1V1) / P2

V2 = (2.0 x 10^6 atm * 1.

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Volume of Ba(OH)₂ : 0.363 L

Balanced equation :

H₂(g)+S(s)+2OH⁻(aq)⇒ S²⁻(aq)+2H₂O(l) (eq 1)

Ba(OH)₂⇒Ba²⁺+2OH⁻ (eq 2)

mol S :

\(\tt \dfrac{3~g}{32~g/mol}=0.09375\)

mol OH from eq 1 : (mol S : mol OH = 1 : 2)

\(\tt \dfrac{2}{1}\times 0.09375=0.1875\)

mol Ba(OH)₂ from eq 2 : (mol Ba(OH)₂ : mol OH⁻=1 : 2)

\(\tt \dfrac{1}{2}\times 0.1875=0.09375\)

volume of Ba(OH)₂ :

\(\tt Volume =\dfrac{mol}{M}=\dfrac{0.09375}{0.258}=0.363 L\)

If gas A has a partial pressure of 1.4 atm and gas B has a partial pressure of 3.2 atm, then there is 4.6 atm of total pressure within the balloon.

Each gas exerts its own pressure, or partial pressure, when two or more of them are combined in a container. The sum of all the partial pressures of the gases contained in the container represents the overall pressure within.

Gas A has a partial pressure of 1.4 atm in this instance, while gas B has a partial pressure of 3.2 atm

The sum of the partial pressures of the two gases creates the overall pressure within the balloon. As a result, the overall pressure is:

Total Pressure = Partial Gas A Pressure + Partial Gas B Pressure

Total Pressure = 1.4 + 3.2

Pressure overall is 4.6 atm.

As a result, the balloon's internal pressure is 4.6 atm overall.

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For the solubility of a gas is 0.890 g/L at a pressure of 120 kPa, the solubility of the gas, if the pressure is changed to 100 kPa is mathematically given as

c=0.741g/l

Generally, the equation for the Pressure   is mathematically given as

p=kc

Therefore

k=p/c

k = 120 /0.890

k=134.8

In conclusion, if p=100kpa

c=p/k

c=100/134.8

c=0.741g/l

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Answer:

B

Explanation:

because polarity of the water molecules is due to the B. deflection of the hydrogen atoms by the lone pair of electrons.

Answer:

B

Explanation:

C₂H₆O is referred to the chemical formula corresponds to this structural formula and is denoted as option D.

This contains information about the chemical proportion of atoms present in a molecule.

In this scenario, there are two carbon atoms, six hydrogen atoms and one oxygen atom which can be written as C₂H₆O. This is therefore the most appropriate choice in this scenario.

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Answer: D.) C6H14

Explanation: i hope this helps (this is for another question you might have tho) :)

Answer:

look

Explanation:

diffculte ou my good i need help too

Answer:

A

Explanation:

because the acid in your stomach can break down anything that you eat causing you to have to use the restroom