11. Imagine that the unknown solution contains potassium bicarbonate, which is frequently used as a pH buffering agent in foods and medications, and like sodium bicarbonate, will react with an acid. For the reaction between potassium bicarbonate solution and acetic acid solution (the reactants), write the (1) balanced molecular equation, (2) the complete ionic equation, (3) the net ionic equation AND identify the spectator ions, if any.

The term that the scientist would use in this case is partial pressure. Option D

The pressure that one particular gas component within a mixture of gases exerts is referred to as partial pressure. It is the pressure that the gas would experience at the same temperature if it were the only thing in the entire volume.

When researching gas mixtures, such as in gas laws, gas phase equilibria, and gas collecting methods, partial pressures are extremely crucial for the gas.

Learn more about partial pressure:https://brainly.com/question/30114830

#SPJ1

Answer:

Au

Explanation:

For the density of a face-centered cubic:

\(Density = \dfrac{4 \times M_w}{N_A \times a^3}\)

where

\(M_w\) = molar mass of the compound

\(N_A=\) avogadro's constant

\(a^3 =\) the volume of a unit cell

Given that:

Density \((\rho)\) = 19.30 g/cm³

a = 0.408 nm

a = \(0.408 \times 10^{-9} \times 10^{2} \ cm\)

a = \(4.08 \times 10^ {-8} \ cm\)

∴

\(19.3 = \dfrac{4 \times M_w}{(6.023 \tmes 10^{23})\times (4.08 \times 10^{-8})^3}\)

\(M_w= \dfrac{19.3\times (6.023 \times 10^{23})\times (4.08 \times 10^{-8})^3}{4}\)

\(M_w=197.37 \ g/mol\)

Thus, the molar mass of 197.37 g/mol element is Gold (Au).

Answer:

1. Using the ideal gas law, PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin, we can solve for V:

V = (nRT) / P

Plugging in the given values, we get:

V = (0.210 mol)(0.08206 L·atm/mol·K)(295.5 K) / 1.00 atm

V = 4.91 L

Therefore, the sample of gas occupies 4.91 L.

2. We can use the combined gas law to find the new volume of the sample at the new temperature and pressure:

(P1V1) / (n1T1) = (P2V2) / (n2T2)

At conditions 1, we know P1 = 1.00 atm, V1 = 4.91 L, n1 = 0.210 mol, and T1 = 295.5 K.

At conditions 2, we know P2 = 1.00 atm (pressure is constant), n2 = n1 (number of moles is constant), and T2 = 95.0 + 273.15 = 368.15 K.

Solving for V2, we get:

V2 = (P1V1n2T2) / (n1T1P2)

V2 = (1.00 atm)(4.91 L)(0.210 mol)(368.15 K) / (0.210 mol)(295.5 K)(1.00 atm)

V2 = 7.23 L

Therefore, the new volume of the sample at the higher temperature is 7.23 L.

3. At STP (standard temperature and pressure), which is 0 °C (273.15 K) and 1 atm, the molar volume of an ideal gas is 22.4 L/mol. Therefore, the number of moles of gas can be calculated as:

n = V / Vm

where Vm is the molar volume of gas at STP, which is 22.4 L/mol.

n = 2.82 L / 22.4 L/mol

n = 0.126 mol

The molar mass of the gas can be calculated as:

molar mass = mass / n

mass = 2.54 g

molar mass = 2.54 g / 0.126 mol

molar mass = 20.16 g/mol

Therefore, the molar mass of the gas is 20.16 g/mol.

4. Let's assume that the total number of moles in the mixture is 1 (since we don't know the actual amount). The first gas constitutes 65% of the mixture, so its mole fraction is 0.65. Therefore, the mole fraction of the second gas is 0.35 (since the sum of the mole fractions must equal 1). The partial pressures of the two gases can be calculated using the mole fractions and the total pressure:

Pgas1 = mole fraction of gas 1 x total pressure

Pgas1 = 0.65 x 4.3 atm

Pgas1 = 2.79 atm

Pgas2 = mole fraction of gas 2 x total pressure

Pgas2 = 0.35 x 4.3 atm

Pgas2 = 1.51 atm

Therefore, the partial pressure of the first gas is 2.79 atm and the partial pressure of the second gas is 1.51 atm.

5. The mole fraction of a gas is the ratio of the number of moles of that gas to the total number of moles in the mixture. We can find the total number of moles by adding up the partial pressures of the gases and dividing by the total pressure:

total moles = (partial pressure of gas A + partial pressure of gas B + partial pressure of gas C) / total pressure

total moles = (0.75 atm + 0.50 atm + 0.25 atm) / 1.50 atm

total moles = 1.50 moles

To find the mole fraction of helium, we need to know the number of moles of helium. We can use the partial pressure of helium and the total pressure to calculate the number of moles of helium using the ideal gas law:

n = PV / RT

n = (0.50 atm)(1.00 L) / (0.08206 L·atm/mol·K)(298 K)

n = 0.0202 mol

Now we can calculate the mole fraction of helium:

mole fraction of helium = moles of helium / total moles

mole fraction of helium = 0.0202 mol / 1.50 moles

mole fraction of helium = 0.0135

Therefore, the mole fraction of helium in the gas mixture is 0.0135.

Physical methods include monitoring temperature, pressure, and color change. Chemical methods include titration and gas analysis.

Monitoring the rate of chemical reactions is important to understand the kinetics of the reaction and optimize the reaction conditions. Physical and chemical methods are used for this purpose.

Physical methods include measuring the change in temperature, volume, and pressure of the reactants and products with time. The rate of reaction can be calculated from the rate of change of these parameters.

Chemical methods include monitoring the concentration of reactants and products with time. This can be done by techniques such as spectroscopy, chromatography, and electrochemistry. These methods are often more accurate and precise than physical methods.

Learn more about chemical reaction, here:

https://brainly.com/question/29039149

#SPJ2

Answer:

Ca3(PO4)2

Explanation:

Ca3(PO4)2 or calcium phosphate is insoluble in water.

Answer:

Decomposition or cracking

Explanation:

 Given reaction:

           2Al₂SO₃  →  4Al  + 3O₂

This reaction is a decomposition or cracking reaction.

In such a reaction, two or more products are formed from a single reactant; e.g;

             A  →  B + C

The breakdown of  a compound into component individual elements or other compounds falls into this type of reaction.

Answer:

Chemical change

Explanation: Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances.

The equilibrium constant at this temperature is Kc= 4.17 x 10⁻⁶.

Since the equilibrium constant depends on the equilibrium concentration of both the reactants and the products of the chemical reaction.

Balanced reaction equation

2CH₄(g)⇌C₂H₂(g)+3H₂(g)

The initial concentration of the CH₄ = 0.093 M

The equilibrium concentration of the H = 0.017 M

Equilibrium constant = ?

Let's make the ice table

2CH₄(g) ⇌ C₂H₂(g) + 3H₂(g)

0.093 M 0 0

-2x +x +3x

0.093-2x x 0.017 M

3x = 0.017 M

Therefore, x =0.017 M /3 = 0.00567 M

Therefore, the equilibrium concentration of CH₄ =

0.093 M – 2x = 0.093 M – (2 x 0.00567 M) = 0.0817 M

Equilibrium concentration of the C₂H₄ = x = 0.00567 M

Let's write the equilibrium constant expression

Kc= [C₂H₄[H2]³/[CH₄]²

Let's put the values in the formula

Kc= [0.00567][0.017]³/[0.0817]²

Kc= 4.17 x 10⁻⁶

Therefore, the equilibrium constant is 4.17 x 10⁻⁶.

To learn more about equilibrium constant, refer to the link:

https://brainly.com/question/12971169

#SPJ9

The physical concept of temperature indicates in numerical form how hot or cold something is. The temperature shown on the thermometer is -13⁰C. Therefore, option B is correct.

A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances.

Body temperature is 98.6 F on average (37 C). However, the average body temperature might be anywhere from 97 F (36.1 C) to 99 F (37.2 C) or higher. Depending on the time of day or how busy you are, your body temperature may change.

A measurement of an object's degree of heat is its temperature. A thermometer is a tool for determining temperature. Our body temperature is measured with a clinical thermometer. This thermometer has a range of 35 to 42 degrees Celsius.

Thus, option B is correct.

To learn more about temperature, follow the link;

https://brainly.com/question/11464844

#SPJ2

Answer:

The best existing methods of control—artemisinin-based drug treatment and insect control with chemical sprays and treated bednets—can reduce the burden of disease substantially, and can even eliminate the disease in some regions,

hope this will help you more

Four significant figures is 49760000 kg, 49760Mg, 49760 ton.

Since 1000 g = 1 kg we can convert grams to kg by multiplying any given quantity in grams by the conversion factor ( 1 kg / 1000 g):

\($4.976 \times 10^{10} \mathrm{~g}$\)   *(1 kg / 1000 g)=49760000 kg

Since 1 mg = 1 x 10⁻³ g, the conversion factor will be ( 1 mg / 1 x 10⁻³ g):

\($4.976 \times 10^{10} \mathrm{~g}$\) * (  1 Mg / 1 x 10⁶ g)= 49760Mg

Since 1 metric ton = 1000 kg and 1000 g = 1 kg, we can use these conversions factors: ( 1 kg / 1000 g) and (1 ton / 1000 kg):

\($4.976 \times 10^{10} \mathrm{~g}$\) * ( 1 kg / 1000 g) * ( 1 ton / 1000 kg)= 49760 ton

A conversion factor is a number that is used to multiply or divide one set of units into another. When converting to an equivalent value, the appropriate conversion factor must be utilized. To convert inches to feet, for example, the suitable conversion value is 12 inches equal 1 foot.

To learn more about conversions factors visit:https://brainly.com/question/20822566

#SPJ9

For a solution of sodium hydroxide:

1. To make a buffer with pH = 5.00, have a ratio of

\(\frac{[A-]}{[HA]} = 10^{-5.50}\) = 0.316. The concentration of acetic acid is 0.200 M, so add enough sodium hydroxide to make the concentration of acetate 0.316 M.

The volume of sodium hydroxide needed is calculated as follows:

V(NaOH) = (0.316 M - 0.200 M) / 4.50 M = 0.0316 L = 31.6 mL

Therefore, 31.6 mL of 4.50 M sodium hydroxide must be added to 250.0 mL of 0.200 M acetic acid solution to make a buffer with pH = 5.00.

2. The pH of the buffer is calculated as follows:

pH = pKa + log(\(\frac{[A-]}{[HA]}\))

= 4.76 + log(0.2/0.1)

= 4.86

Therefore, the pH of the buffer is 4.86.

3. The mass of salt that must be dissolved in 0.25 dm³ of 1 mol dm³ propanoic acid to give a buffer of pH 4.87 is calculated as follows:

\(\frac{[A-]}{[HA]} = 10^{-4.87}\) = 0.0114

The concentration of acetate is 0.0114 M, and the concentration of propanoic acid is 1 mol dm³. Therefore, the mass of acetate that must be dissolved is calculated as follows:

Mass of acetate = (0.0114 mol dm³)(0.25 dm³) = 0.00285 g

Therefore, 0.00285 g of sodium propanoate must be dissolved in 0.25 dm³ of 1 mol dm³ propanoic acid to give a buffer of pH 4.87.

4. The pH of the buffer is calculated as follows:

pH = pKa + log(\(\frac{[A-]}{[HA]}\))

= 4.74 + log(0.1/0.1)

= 4.74

Therefore, the pH of the buffer is 4.74.

Find out more on buffer here: https://brainly.com/question/13076037

#SPJ1

The correct order from fastest to slowest is oxygen (O2), glucose, and sodium ions.


Lipid bilayers are composed of two layers of lipid molecules that form a barrier around the cell. The barrier is selectively permeable, meaning that it only allows certain molecules to pass through. The rate at which molecules pass through the lipid bilayer depends on their size, charge, and solubility in lipids.

Oxygen (O2) is a small, uncharged molecule that is highly soluble in lipids. This allows it to pass through the lipid bilayer at a fast rate. Glucose is a larger, uncharged molecule that is less soluble in lipids. This means that it passes through the lipid bilayer at a slower rate than oxygen. Sodium ions are charged particles that are not soluble in lipids. This makes it difficult for them to pass through the lipid bilayer, and they do so at a very slow rate.

Therefore, the correct order from fastest to slowest is oxygen (O2), glucose, and sodium ions.

To learn more about oxygen, refer:

https://brainly.com/question/14992033#

#SPJ11

The mass, in kilograms, of aluminum sulfate required to produce 35.85 kilograms of lead (IV) sulfate would be 13.48 kilograms.

The equation of the reaction is as follows:

\(3Pb(CH_3COO)_2 + Al_2(SO_4)_3 -- > 3Pb(SO_4) + 2Al(CH_3COO)_3\)

Mole ratio of aluminum sulfate and lead (IV) sulfate = 1:3

Mole of 35.85 kilograms of lead (IV) sulfate = 35.85x1000/303.26 = 118.2154 moles.

Equivalent moles of aluminum sulfate = 118.2154/3 = 39.41 moles

Mass of 39.41 moles of aluminum sulfate = 39.41 x 342.15 = 13484 grams

13484 grams = 13484/1000 = 13.48 kg

In other words, the mass of aluminum sulfate required to produce 35.85 kilograms of leave (IV) sulfate is 13.48 kilograms.

More on stoichiometric problems can be found here: https://brainly.com/question/14301905

#SPJ1

The reduction potentials of two elements provide information about the redox reaction between those elements, specifically regarding the process of oxidation and reduction. Option C

C. The reduction potentials indicate which element will be oxidized and which element will be reduced. In a redox reaction, one element undergoes oxidation, where it loses electrons, and another element undergoes reduction, where it gains electrons.

The reduction potential values of the elements can determine the relative tendencies for oxidation and reduction. The element with a higher reduction potential is more likely to be reduced (gain electrons), while the element with a lower reduction potential is more likely to be oxidized (lose electrons).

A. The reduction potentials also indirectly provide information about whether electrons will be gained or lost by the oxidized atom. Since oxidation involves the loss of electrons, the element with the lower reduction potential, which is more likely to be oxidized, is associated with electron loss.

Conversely, the element with the higher reduction potential, which is more likely to be reduced, is associated with electron gain.

B. The reduction potentials do not directly indicate which element is more commonly found in nature. The abundance or occurrence of elements in nature is unrelated to their reduction potentials.

D. The reduction potentials are not related to the electronegativity difference between the two elements. Electronegativity is a measure of an atom's tendency to attract electrons in a chemical bond and is distinct from reduction potential, which focuses on the tendency to undergo reduction or oxidation in a redox reaction.

Option C

For more such questions on eduction potentials visit:

https://brainly.com/question/20040177

#SPJ8

The net ionic equation can be given as Sn²⁺ (aq) + S²⁻ (aq) → SnS (s).

The atoms or molecules on losing or gaining electrons in order to achieve the stable configuration results in the formation of positive or negative charge and are termed as ions.

The ionic equation can be given with the formation of the respective ions of the reactant and the product side.

SnSO₄ (aq) → Sn²⁺ (aq) + SO₄²⁻ (aq)

Na₂S (aq) → 2 Na⁺ (aq)  + S²⁻ (aq)

SnS (s) → did not dissociates as form a solid covalent compound

Na₂SO₄ (aq) → 2 Na⁺ (aq)  + SO₄²⁻ (aq)

The complete ionic equation can be given as:

Sn²⁺ (aq) + SO₄²⁻ (aq) + 2 Na⁺ (aq)  + S²⁻ (aq) → SnS (s)  2 Na⁺ (aq)  + SO₄²⁻ (aq)

Eliminating the common ions on the product and the reactant side:

Sn²⁺ (aq) + S²⁻ (aq) → SnS (s)

Learn more about ionic equation, here:

https://brainly.com/question/15467502

#SPJ1

24.2 g of Argon has 0.6057 moles in it.

We know that the number of moles in a given mass of an element can be calculated by using the formula

⇒ No. of moles = \(\frac{Mass of the element }{Molar mass of the element}\)  (i)

Here, the mass of the element Argon = 24.2 grams (ii)

The molar mass of Argon is = 39.948 a.m.u. (iii)

Using the values for the molar mass and mass of the element (ii and iii), we get

⇒ \(\frac{24.2}{39.948}\)

⇒ 0.6057 moles present in the given mass of Argon.

Therefore, there are going to be 0.6057 moles in 24.2 g of Argon which is given.

Learn to know more about moles on

https://brainly.com/question/26416088

Answer: c????????

Explanation:

Answer:

Refer to the picture. I managed to solve a few.

The stoichiometry calculation involves the ratios of atoms within a compound, and ratios of substances in a chemical reaction.

The stoichiometry calculation involves the relationship between the product and the reactants in the chemical rection. stoichiometry is the measurement of the element. the steps follows the stoichiometry calculation is :

1) balance the chemical reaction.

2) convert the substance units to moles.

3) by using the moles ratio to calculate the yield of the substances in the reaction.

4) convert the moles of the needed elements to the required units.

The stoichiometry calculation is mostly based on the chemical formulas of the compound.

to learn more about stoichiometry  here

https://brainly.com/question/4066401

#SPJ4

Synthesis reactions are a particular kind of chemical reaction in which two or more reactants combine to create a brand-new molecule or product. developing a synthesis plan or approach.

the process through which two or more elements or compounds combine to create a new product, a compound with new qualities. It is called a synthesis reaction because they combine to create a new material.

In order to better comprehend their structures, chemists synthesize chemical substances that are found in nature. Additionally, chemists can synthesize substances that do not occur naturally for research objectives. In the industrial sector, synthesis is used to produce goods in huge quantities.

To know more about Synthesis reactions visit :-

https://brainly.com/question/2165817

#SPJ4

Answer:

James Chadwick conducted an experiment where he assailed the element Beryllium with alpha particles that came from the radioactive decay of Polunium. The experiment results showed highly penetrating radiation emitted from the Beryllium. In this, Chadwick proposed that radiation consisted of uncharged particles, which were later founded as neutrons.

The emission wavelength of the atoms excited above the ground state is 599.8 nm.

The emission wavelength of the atom is determined by using the following formulas as shown below;

E = hf

E = hc/λ

where;

λ = hc/E

λ = (6.626 x 10⁻³⁴ x 3 x 10⁸) / (3.314 x 10⁻¹⁹)

λ = 5.998 x 10⁻⁷ m

λ = 599.8 x 10⁻⁹ m

λ = 599.8 nm

Thus, the emission wavelength of the atoms is 599.8 nm.

Learn more about wavelength here: https://brainly.com/question/10728818

Answer:

985.2 moles of nitrogen can produce 1970.4 moles of ammonia.

Explanation:

The balanced chemical equation for the production of ammonia from nitrogen is:

N2 + 3H2 → 2NH3

From the balanced equation, we can see that 1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia.

So, to determine how many moles of ammonia can be produced from 985.2 moles of nitrogen, we need to use the mole ratio from the balanced chemical equation as follows:

985.2 moles N2 x (2 moles NH3 / 1 mole N2) = 1970.4 moles NH3

Therefore, 985.2 moles of nitrogen can produce 1970.4 moles of ammonia.

The milk mixture can be classified as colloid if  the sample of milk in water does not settle over time.The option is C

Colloid is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance.

There are types of Colloids such as :

Therefore colloid is a mixture that has particles ranging between 1 and 1000 nanometers in diamete yet are still able to remain evenly distributed. Colloids are heterogeneous in nature.

Learn more about colloid here: brainly.com/question/2234312

#SPJ1

Answer:

so here is the answer

Explanation:

Kinetic is the answer.

Answer:

Language

Explanation:

this is very obvious not to be mean

Answer: The burning of fossil fuels releases carbon dioxide, methane and other greenhouse gases into the atmosphere. These gases trap heat in the atmosphere, leading to a gradual increase in global average temperatures, known as global warming. This phenomenon has serious impacts on our environment and ecosystems, including extreme weather events and rising sea levels.