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1. Blood plasma contains a total carbonate pool of 0. 0252M.
(a) What is the HCO3"/CO2 ratio
(b) What is the concentration of each buffer component present at pH=7. 4
(c) What would the pH be if 0. 01M H" is added assuming that the excess CO2 is not
released.
(d) What would the pH be if 0. 01M H is added assuming that the excess CO2 is released. ​

Answer:

Describe Newton's first law of motion; Recognize friction as an external force ... as a hockey stick changes its state of rest; (b) a hockey puck is shown in motion; ... Newton's first law says that there must be a cause for any change in velocity (a ... The idea of cause and effect is crucial in accurately describing what happens in

Explanation:

Answer:

Describe Newton's first law of motion; Recognize friction as an external force ... as a hockey stick changes its state of rest; (b) a hockey puck is shown in motion; ... Newton's first law says that there must be a cause for any change in velocity (a ... The idea of cause and effect is crucial in accurately describing what happens in

Explanation:

Answer:

e.g converting 6.55×10^24 molecules of Sodium to moles.

We use Avogadro's number NA= 6.02×10^23 molecules.

Explanation:

\(6.02 \times {10 }^{23} molecules \: are \: in \: 1 \: mole \: of \: sodium \\ 6.55 \times {10}^{24} molecules \: will \: be \: in \: ( \frac{6.55 \times {10}^{24} \times 1}{6.02 \times {10}^{23} } ) \\ = 10.88 \: moles \: of \: sodium\)

Answer:

Sediment moves from one place to another through the process of erosion. Erosion is the removal and transportation of rock or soil. Erosion can move sediment through water, ice, or wind. Water can wash sediment, such as gravel or pebbles, down from a creek, into a river, and eventually to that river's delta.

Explanation:

Erosion refers to the washing away or the removal of top soils/rocks by agents such as water, wind, etc.

Erosion is the removal of topsoils or rocks by agents of erosions. These agents include water, wind, waves, and ice.

In water/ice erosion, topmost soils or rocks are washed away and deposited somewhere else, usually in or at the mouth of nearby water bodies.

Wind erosion carries soils/rocks and deposits them somewhere else. The deposition accumulates over a period of time to form different landforms.

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The critical stress required to cause a fracture in the steel alloy specimen is approximately 365.67 MPa.

To determine the critical stress, we can use the fracture mechanics concept of the stress intensity factor (K). The stress intensity factor relates the applied stress and the size of the crack to the fracture toughness of the material.

The stress intensity factor is given by the equation:

K = Y * σ * sqrt(π * a)

Where:

K is the stress intensity factor

Y is a dimensionless geometric parameter (assumed to be 1.0)

σ is the applied stress

a is the crack length

We are given that the fracture toughness (KIC) of the steel alloy is 51 MPa√m and the largest surface crack length (a) is 0.5 mm (or 0.0005 m).

By rearranging the equation and solving for σ (applied stress), we can find the critical stress required to cause fracture:

σ = K / (Y * sqrt(π * a))

Substituting the given values:

σ = 51 MPa√m / (1.0 * sqrt(π * 0.0005 m))

Evaluating the expression:

σ ≈ 365.67 MPa

Therefore, the critical stress required to cause a fracture in the steel alloy specimen is approximately 365.67 MPa.

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The percent yield of the MgCl2 reaction  is 5.4%

The percent yield of a reaction is calculated by dividing the amount of product collected by the amount of product that should have been collected according to the stoichiometry of the reaction.

In this case, the amount of MgCl2 that should have been collected can be calculated by using the stoichiometry of the reaction.

The reaction is: Mg + 2HCl → MgCl2 + H2

From the stoichiometry, we can calculate that for every 1 mole of Mg, 2 moles of MgCl2 should be produced. Since the mass of 1 mole of MgCl2 is 95.211 g, the amount of MgCl2 that should have been collected is 190.422 g.

Therefore, the percent yield of the reaction can be calculated as:

Percent yield = (10.3 g MgCl2 collected / 190.422 g MgCl2 expected) x 100

Percent yield = 5.4%

Therefore, the percent yield of the reaction is 5.4%.

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The vapor pressure of a solution prepared by mixing 25 grams of methanol and 75 grams of ethanol at 20 degrees Celsius can be calculated using Raoult's law, which states that the vapor pressure of a component in a solution is directly proportional to its mole fraction.

To calculate the vapor pressure of the solution, we need to use Raoult's law, which is expressed as:

\(P_{total}\)= \(P_A\) ×   \(x_A\) +\(P_B\) ×   \(x_B\)

Where \(P_{total}\) is the vapor pressure of the solution, \(P_A\) and \(P_B\) are the vapor pressures of the individual components (methanol and ethanol in this case), and  \(x_A\) and  \(x_B\) are their respective mole fractions.

First, we need to calculate the mole fractions of methanol ( \(x_A\) ) and ethanol ( \(x_B\)) in the solution. To do this, we need to convert the masses of methanol and ethanol into moles using their molar masses. The molar mass of methanol \((CH_3OH)\) is 32.04 g/mol, and the molar mass of ethanol \((C_2H_5OH)\) is 46.07 g/mol.

Moles of methanol = 25 g / 32.04 g/mol

Moles of ethanol = 75 g / 46.07 g/mol

Next, we calculate the mole fractions:

\(x_A\) = Moles of methanol / (Moles of methanol + Moles of ethanol)

\(x_B\) = Moles of ethanol / (Moles of methanol + Moles of ethanol)

Now that we have the mole fractions, we can substitute them into Raoult's law to calculate the vapor pressure of the solution:

\(P_{total}\) = 92 torr × \(x_A\) + 45 torr ×  \(x_B\)

Substituting the calculated values of \(x_A\) and \(x_B\) will give us the vapor pressure of the solution at 20 degrees Celsius.

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Answer:

100x less acidic

Explanation:

pOH is the inverse of pH, which is a measure of the acidity or basicity of a solution. The lower the pH of a solution, the more acidic it is, and the higher the pOH, the less acidic it is.

To determine how many times more acidic a solution with a pOH of 12 is compared to a solution with a pOH of 10, we can use the formula:

pH1 / pH2 = 10^(pOH1 - pOH2)

In this case, we are given that the pOH of the first solution is 12 and the pOH of the second solution is 10. We can plug these values into the formula to calculate the ratio of acidity:

pH1 / pH2 = 10^(12 - 10)

= 10^2

= 100

Therefore, a solution with a pOH of 12 is 100 times less acidic than a solution with a pOH of 10.

Answer:

So A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

Explanation:

words to know: covalent bond, electronegativities, and simultaneously

Covalent Bond: A chemical bond formed when electrons are shared between two atoms. Usually each atom contributes one electron to form a pair of electrons that are shared by both atoms.

Electronegativities: the degree to which an element tends to gain electrons and form negative ions in chemical reactions.

Simultaneously: at the same time.

hope this helps!

The factors affecting solubility ​the student should consider are temperature, pressure and surface area.

Solubility is the amount of solute that dissolves in a solvent.

Solubility can also be defined as the maximum amount of a substance that will dissolve in a given amount of solvent at a specified temperature.

The following factors affect solubility of a solute;

However, there are two direct factors that affect solubility. They include temperature and pressure. Temperature affects the solubility of both solids and gases, but pressure only affects the solubility of gases.

Thus, the factors affecting solubility ​the student should consider in preparing the sugar solution for immediate use are temperature, pressure and surface area.

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Reduction: Bi+3 (aq) + 3e- → BiO?3 (aq) + 3H2O (l)

Oxidation: Zn (s) → Zn+2 (aq) + 2e-

In the given redox reaction between Zn+2 and Bi+3, the balanced half-reactions can be determined. The reduction half-reaction involves Bi+3 ions gaining three electrons to form BiO?3 and water.

This reduction process represents the reduction of Bi+3 to BiO?3. On the other hand, the oxidation half-reaction involves solid zinc (Zn) losing two electrons to form Zn+2 ions.

This oxidation process demonstrates the oxidation of Zn to Zn+2. By balancing the number of electrons gained and lost in these half-reactions, we ensure charge neutrality and can construct the overall balanced redox reaction.

The half-reactions serve as a way to break down the redox reaction into separate processes, highlighting the electron transfer and changes in oxidation states.

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Increasing atomic radius can have a significant impact on the crystal structure of a material, affecting parameters such as interatomic distances, coordination numbers, lattice parameters, symmetry, and mechanical properties.

As the atomic radius increases, there are several effects on the crystal structure of a material:

1. Interatomic Distance: With increasing atomic radius, the average distance between neighboring atoms in a crystal lattice also increases. This leads to a larger unit cell and a decrease in atomic packing density.

2. Coordination Number: The coordination number refers to the number of atoms surrounding an atom in a crystal lattice. As the atomic radius increases, the coordination number may change. For example, a smaller atom might have a higher coordination number, while a larger atom might have a lower coordination number. This can influence the overall structure and stability of the crystal.

3. Lattice Parameters: The lattice parameters, such as the lattice constant or unit cell dimensions, may be affected by changes in atomic radius. An increase in atomic radius can result in an expansion of the crystal lattice, leading to changes in the lattice parameters.

4. Symmetry: Changes in atomic radius can affect the symmetry of the crystal structure. Larger atoms may disrupt the symmetry and introduce distortions or vacancies in the crystal lattice.

5. Mechanical Properties: The mechanical properties of a material, such as its strength, hardness, and flexibility, can be influenced by changes in atomic radius. Alterations in atomic size can affect the bonding forces between atoms and, consequently, the material's mechanical behavior.

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When the gas is compressed to a volume of 10.7 L, its pressure is approximately 1.538 atm.

To determine the final pressure of the gas when it is compressed to a volume of 10.7 L, we can use Boyle's Law. Boyle's Law states that at a constant temperature, the pressure and volume of a gas are inversely proportional.

The formula for Boyle's Law is:

P1 * V1 = P2 * V2

Where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the final pressure and volume.

Given:

Initial volume (V1) = 12.6 L

Initial pressure (P1) = 1.31 atm

Final volume (V2) = 10.7 L (compressed volume)

We need to find the final pressure (P2).

Using Boyle's Law, we can rearrange the formula to solve for P2:

P2 = (P1 * V1) / V2

Substituting the given values:

P2 = (1.31 atm * 12.6 L) / 10.7 L

Calculating this expression:

P2 ≈ 1.538 atm

Therefore, when the gas is compressed to a volume of 10.7 L, its pressure is approximately 1.538 atm.

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At present, the greenhouse effect of carbon dioxide is not greater than that of water vapor. Thus, the given statement is false.

The amount of effect that water vapor has on the greenhouse effect is about 40-50 percent while with carbon dioxide, it accounts to 25 percent. The significant difference between them shows the different impacts on the greenhouse effect.

Both of them cause the same effects of heat, however, water vapor being a greenhouse gas is inevitable and natural.  It is much needed for life to sustain on earth, however, the numbers have increased causing an alarming rate of change that may not be good.

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Hbr(aq) h2o(l)→h3o (aq) (aq) br−(aq) Write your responses in chemical terms. Enter your responses using commas to separate them in the question's sequence. Compound acid - H3O+, Composite base - Br-, Bronsted-lowry acid - HBr, and Brønsted - lowry bases - H2O.

Any material with a different compositions is a chemical. To put it another way, every chemical always consists with same "stuff." There are some substances in nature, like water. Other chemicals, including chlorine, are produced Covalent compounds hold together molecules, ionic compounds hold together ions, metallic bonds keep together intermetallic compounds, and coordinate covalent bonds hold coordination complexes together.

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ethanol acid and methanoic acid were used to prepare the ester compounds.

what are esters ?

Esters are carboxylic acid derivatives in which the hydrogen of the carboxylic acid (-COOH) has been replaced by an alkyl group (-R) such as methyl, ethyl, or a benzene ring such as phenyl. The ester functional group is denoted by the symbol -COOR. Esters are present in flowers and fruits, which give them their aroma. Esters are a particularly significant family of acid derivatives since they are used in a wide range of synthetic items such as fragrances, insecticides, solvents, and so on. An ester's name is made up of two parts. First, the alkyl group R' is directly linked to one of the oxygens in RCOOR'. The second portion is the name of the parent acid, with the '-ic acid' ending converted to '-ate' for ester.

ethanol acid and methanoic acid were used to prepare the ester compounds.

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The pressure of the gas inside the cylinder is 52.90 atm

Given is the number of moles of gas, the temperature and the volume of the gas and we need to find the pressure of the gas inside the cylinder, for this we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure of the gas (in units of pressure, such as atm)

V = Volume of the gas (in liters)

n = Number of moles of the gas

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature of the gas (in Kelvin)

First, let's convert the temperature from Celsius to Kelvin:

T = 25.0 °C + 273.15 = 298.15 K

Now we can substitute the values into the ideal gas law equation:

P × 12.5 L = 27.0 moles × 0.0821 L·atm/(mol·K) × 298.15 K

Simplifying the equation:

P × 12.5 L = 661.2587 L·atm

Dividing both sides by 12.5 L:

P = 661.2587 L·atm / 12.5 L

P ≈ 52.90 atm

Therefore, the pressure of the gas inside the cylinder is approximately 52.90 atm.

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We can use the ideal gas law equation to determine the pressure of a gas within a cylinder:

PV = nRT

Where:

P is the pressure of the gas (in units of pressure, such as atm)

V is the volume of the gas (in units of volume, such as liters)

n is the number of moles of the gas

R is the ideal gas constant (0.0821 L·atm/(mol·K))

T is the temperature of the gas (in units of temperature, such as Kelvin)

we need to convert the temperature from Celsius to Kelvin:

T(K) = T(°C) + 273.15

T(K) = 25.0 °C + 273.15

T(K) = 298.15 K

Now we can plug the data into the ideal gas law equation as follows:

P * 12.5 L = 27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K

Simplifying the equation:

P = (27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K) / 12.5 L

Calculating the pressure:

P ≈ 5.046 atm

As a result, the gas inside the cylinder is under a pressure of about 5.046 atm.

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The concentration of the phosphoric acid solution if 36.42 mL of 3.500 M NaOH are required to neutralize 85.00 mL it is 1.49M.

The concentration of a substance or solution can be calculated using the following expression;

CaVa = CbVb

Where;

According to this question, 36.42 mL of 3.500 M NaOH are required to neutralize 85.00 mL of a phosphoric acid solution in a titration. The concentration can be calculated as follows;

85 × Ca = 36.42 × 3.5

85Ca = 127.47

Ca = 127.47 ÷ 85

Ca = 1.49M

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The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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Baking soda neutralizes the acid so D

Baking soda is a weak base and will neutralize the acid.

Explanation:

       \(NaHCO_3+HA\rightarrow NaA+H_2O+CO_2\)

        (Where: HA is the general formula of an acid)

That is why the baking soda is present in the acid spill kits. So from this, we can conclude that the correct answer is option D.

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Answer:

Gravitropism also known as geotropism is a coordinated process of differential growth by a plant in response to gravity pulling on it. When laid onto its side, the growing parts of the stem begin to display negative gravitropism, this could aslo be a sign of tromism of growing upwards. Tropism is very common and if you see a weird looking tree with even a weird looking stump than even that could be classified as Gravitropism.

Answer:

I need an image to help you as best as I can. Hopefully, this gets your attention so I can try to help!

Explanation:

There is 3.80 mol of solute particles present in 1 L (exact) of aqueous 1.90 M KBr.

In 1 L of 1.90 M KBr, there are 1.90 moles of KBr.

Since KBr dissociates into 2 ions (K+ and Br-) in an aqueous solution, the number of solute particles (ions) will be doubled.

KBr   →     K+ and Br-

Therefore, there are 1.90 moles × 2 = 3.80 moles of solute particles present in 1 L of aqueous 1.90 M KBr.

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To determine the sulfate ion concentration of the resulting solution, we first need to calculate the moles of sulfate ions in each solution, and then add them together.

For the CuSO4 solution:

moles of CuSO4 = concentration x volume in liters

moles of CuSO4 = 1.50 mol/L x 0.075 L

moles of CuSO4 = 0.1125 mol

Since there is 1 mole of sulfate ion for every mole of CuSO4, the moles of sulfate ion in the CuSO4 solution is also 0.1125 mol.

For the Co2(SO4)3 solution:

moles of Co2(SO4)3 = concentration x volume in liters

moles of Co2(SO4)3 = 1.00 mol/L x 0.050 L

moles of Co2(SO4)3 = 0.050 mol

Since there are 3 moles of sulfate ion for every mole of Co2(SO4)3, the moles of sulfate ion in the Co2(SO4)3 solution is 0.050 mol x 3 = 0.150 mol.

Now, we can add the moles of sulfate ions from each solution together to get the total moles of sulfate ions in the resulting solution:

total moles of sulfate ion = moles of CuSO4 + moles of Co2(SO4)3

total moles of sulfate ion = 0.1125 mol + 0.150 mol

total moles of sulfate ion = 0.2625 mol

To find the sulfate ion concentration of the resulting solution, we need to divide the total moles of sulfate ion by the total volume of the resulting solution, which is the sum of the volumes of the two solutions:

total volume = 75.0 mL + 50.0 mL

total volume = 125.0 mL or 0.125 L

sulfate ion concentration = total moles of sulfate ion / total volume

sulfate ion concentration = 0.2625 mol / 0.125 L

sulfate ion concentration = 2.10 mol/L

Therefore, the sulfate ion concentration of the resulting solution is 2.10 mol/L.

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Answer:  I'm not sure but these may help!

Explanation: querer, perder - (e) changes to (ie) Quiero comer. I want to eat.

pedir - (e) changes to (i) Yo pido agua. I ask for water

jugar - (u) changes to (ue) Yo juego con el perro. I play with the dog.

Answer:

A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

Explanation:

A decrease in temperature during a chemical reaction indicates that the system has lost energy to the surroundings and is because the energy released during the reaction is transferred from the system to the surroundings in the form of heat.

The type of process that causes a decrease in temperature during a chemical reaction is known as an exothermic process. In exothermic reactions, energy is released from the system in the form of heat and transferred to the surroundings, resulting in a decrease in the energy of the system. Exothermic reactions are commonly observed in combustion reactions, where a fuel reacts with oxygen to produce heat and light energy.

It is important to note that the amount of energy released during an exothermic reaction can vary depending on the specific reactants and conditions involved. In some cases, exothermic reactions can release a significant amount of energy, such as in the case of explosive reactions. In other cases, the energy released may be relatively small and not readily apparent, such as in the case of rusting of iron.

In summary, a decrease in temperature during a chemical reaction is an indication of an exothermic process, where energy is released from the system to the surroundings in the form of heat.

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The correct answer is "physical change because even though gas formation was observed, the water was undergoing a state change, which means that its original properties are preserved".

When water boils, it undergoes a physical change from a liquid state to a gas state, but the water molecules remain the same and its chemical properties do not change. The boiling of water is a result of an increase in temperature and does not involve a chemical reaction.

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It is because the high temperature superconductor was more affordable، easy to use and more efficient than before.

Hope it helps you...

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Answered by Benjemin

The number of the molecules of water is 1.8 g is  6.02 * 10^22 molecules.

We can be able to obtain the molecules from the Avogadro's number. We know that the number of the molecules that we find in the compound can be gotten by the use of the proposition that was put forward by Avogadro.

Number of moles of the water = 1.8g/18 g/mol = 0.1 moles

We know that;

1 mole of water contains 6.02 * 10^23 molecules of water

0.1 moles of water would contain 0.1 mole * 6.02 * 10^23 molecules/ 1 mole

= 6.02 * 10^22 molecules

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