Convert 7 mol carbon to grams.

To determine the pKb1 of CO32-, we can use the relationship between pKa and pKb for conjugate acid-base pairs:

pKa + pKb = pKw

where pKw is the ionization constant of water, which is approximately 14. Therefore, we can rearrange the equation to solve for pKb:

The pKb value represents the negative logarithm of the equilibrium constant (Kb) for the reaction of a base with water. In this case, we are interested in the equilibrium reaction between CO32- and water, which can be represented as CO32- + H2O ⇌ HCO3- + OH-.

By utilizing the relationship pKa + pKb = pKw, we can rearrange the equation to solve for pKb. Given that pKa1 of H2CO3 is 6.35, we subtract this value from pKw (approximately 14) to obtain pKb1

pKb = pKw - pKa

pKb1 = 14 - 6.35 = 7.65

Since none of the given answer choices matches the calculated value, it seems there might be an error or omission in the available options. Please double-check the answer choices provided or refer to additional information to obtain the correct pKb1 value for CO32-.

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Answer:

There are 3 elements, Sodium, Carbon, and oxygen. There are 2 Sodium atoms 2*2=4, one carbon, and 3 Oxygen so 4+1+3=8 total atoms. one compound CO3  

Explanation:

that's all I know

answer: 1.83 to 1

or at least that’s what i got

Lead has 82 protons and 82 electrons.

Lead, with an atomic number of 82, indicates the number of protons in its nucleus. Therefore, lead has 82 protons. Since atoms are electrically neutral, the number of electrons in an atom is equal to the number of protons. Consequently, lead also has 82 electrons.

The protons, located in the nucleus, carry a positive charge, while the electrons, which orbit around the nucleus, carry a negative charge. The equal number of protons and electrons ensures that the overall charge of a lead atom is neutral.

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Answer: 18

Explanation:hope this help

There are several amino acids that are usually positive, or protonated, at physiological pH, which is around 7.4. These include histidine, lysine, and arginine.

Histidine has a side chain with a pKa of approximately 6.0, which means that at physiological pH, about half of the histidine molecules will be protonated and carry a positive charge. Lysine and arginine have side chains with even higher pKa values, around 10.8 and 12.5, respectively. As a result, almost all of the lysine and arginine molecules in a physiological environment will be protonated and positively charged. These positively charged amino acids play important roles in protein structure and function, as well as in enzyme catalysis and ion transport across cell membranes.
Amino acids that are usually positive or protonated at physiological pH (around 7.4) are lysine, arginine, and histidine. These amino acids contain basic side chains which can accept protons, making them positively charged under physiological conditions.

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The thermal conductivity of a substance affects its ability to heat or be heated by its surroundings because the higher the thermal conductivity of a substance, the more easily it can be heated or heat others.

Thermal conductivity of a substance refers to the ability of a substance to allow heat energy to easily flow through it.

The higher the thermal conductivity of a substance, the more easily it can be heated or heat its surroundings.

The thermal conductivity of a substance varies according to the nature of the substance. Metals generally have high thermal conductivities whereas non-metals usually have low thermal conductivity.

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The ratio of the moles of a solute to the volume of the solution is called its molarity. The molarity of the acid solution can be calculated by dividing the quantity of HCl (in moles) by the volume (in liters) of solution in which it was dissolved.

The calculations of stoichiometry in samples and pure materials whose mass could be measured by weighing Frequently, a gas existed in the reactant.

Applying the ideal gas equation and the idea of molar volume in these situations would allow us to calculate the mass of the sample if we knew its pressure, volume, and temperature.

We can now include solutions in stoichiometric calculations by using a conversion factor that takes the concentration of a solution into account.

Example :

How much barium sulfate is precipitated when a surplus of sulfuric acid is added to 55.6 mL of 0.54 M barium chloride?

Solution

BaCl2 + H2SO4 = BaSO4 + 2 HCl

presented with 55.6 mL of 0.54 M BaCl2

Conversion variables

One mol of BaCl2 creates one mol of BaSO4, which weighs 233.4 g, and there are 0.54 mol of BaCl2 in one liter and 0.54 mmol in one milliliter of BaCl2, respectively.

Answer to the equation in math: 7.0 g BaSO4.

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The given problem involves determining the number of moles of hydroxide produced for every mole of calcium that reacts when one mole of HCl reacts with one mole of hydroxide. Specifically, we are asked to use Equation 4-2 to determine the stoichiometry of the reaction and calculate the required amount of hydroxide.

To determine the stoichiometry of the reaction and calculate the amount of hydroxide produced, we need to use the balanced chemical equation for the reaction between HCl and hydroxide. Equation 4-2 states that HCl and hydroxide react to form water and a salt, which in this case is calcium chloride. The balanced equation can be expressed as HCl + Ca(OH)2 → CaCl2 + H2O.Using the balanced equation and the given information, we can determine the stoichiometry of the reaction and calculate the required amount of hydroxide produced for every mole of calcium that reacts. We can use the stoichiometric coefficients in the balanced equation to calculate the mole ratios between the reactants and products.

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The speed of the particles rises with the temperature of the solid, liquid, or gas. The particles slow down with decreasing temperature.

A liquid can turn into a solid if it is cooled down far enough.

The average kinetic energy of the molecules falls as a liquid cools.

The liquid eventually turns into a solid when the quantity of heat removed is sufficient to cause the molecules to be attracted to one another.

Freezing is the process of transitioning from a liquid to a solid.

It loses thermal energy when the liquid cools. Its constituent particles therefore decelerate down and converge.

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Answer:

iron

Explanation:

[Ar]4s23d2 is the noble gas notation for titanium.

The noble gas notation is a way of writing the electron configuration of an atom that uses the symbol for the nearest noble gas to represent the filled inner shells. In the case of titanium, the nearest noble gas is argon, which has an electron configuration of [Ar]3d104s2.

The electron configuration for titanium is then written as [Ar]4s23d2. This means that the titanium atom has the same electron configuration as argon, plus two electrons in the 4s subshell and two electrons in the 3d subshell.

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Answer:

See explanation

Explanation:

A system is said to have attained dynamic equilibrium when the rate of forward reaction and the rate of reverse reaction are equal.

Considering the system under consideration;

I2(s)⇄I2(g)

Heating the container converts solid iodine to purple coloured iodine vapour.

At equilibrium, there will be no net change in the amount of solid iodine and iodine vapour present in the system because the two processes (forward and reverse reactions) occur at the same rate at equilibrium.

Option C) RbOH, HBr cannot be mixed together to form a buffer solution is Correct. A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it.

The ability of a solution to resist changes in pH is determined by the concentrations of the weak acids and bases present in the solution, as well as the concentration of the strong acid or base that is added to the solution. The weak acids and bases present in a buffer solution react with the strong acid or base to form a salt and water. The salt and water react to neutralize the strong acid or base, maintaining the pH of the solution.

In the case of RbOH and HBr, the weak base, RbOH, and the weak acid, HBr, cannot react with each other to form a salt and water. Therefore, they cannot form a buffer solution. The other pairs of solutions can form a buffer solution if the concentrations of the weak acids and bases present in the solutions are appropriate and the strong acid or base is added in the appropriate concentration.

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Answer:

1.03L

Explanation:

M1V1=M2V2

0.200L×18M=3.5M×V1

3.6=3.5M×V1

divide both sides by 3.5M to cancel out on the right

3.6÷3.5M=1.028L

Answer:

53676 J

Explanation:

m = 355 g

c = 2.4 J/gºC

ΔT = 63°C

q = mcΔT

  = (355)(2.4)(63)

  = 53676 J

The amount of heat is 53676J to raise the temperature of 355 g of ethanol.

Temperature is a measurement of the amount of energy of the atoms in a system or a physical quantity that expresses hot and cold.

Heat is energy that is transmitted through one body to some other due to a temperature differential. When two bodies of different temperatures come together, energy can be transferred (heat flows) from the hotter to the colder.

It can be determined by the formula:

q =mCΔT.

where, q is heat, m is mass , C is and T is temperature.

Calculation of heat is shown below:

It is given that, mass of ethanol = 355 g, c = \(2.4 J/g^{0}\) C, ΔT. = \(63^{0} C\)

Now, put the values of given data in heat formula:

q =mCΔT

= 355×2.4×63

=53676J.

Therefore, the amount of heat will be 53676J to raise the temperature of 355 g of ethanol

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In the given redox reaction: C6H6O5 + NAD+ --> C4H4O5 + NADH + H+. C6H6O5 is the compound that is being oxidized.

The process of oxidation occurs when a chemical loses electrons and becomes more positively charged, whereas reduction occurs when a compound receives electrons and becomes more negatively charged.

Since NAD+ obtains electrons and becomes more negatively charged throughout this process, it is clear that NAD+ is being reduced to NADH.

In contrast, as C6H6O5 loses electrons and becomes more positively charged, it is oxidised to C4H4O5.

Therefore, NAD+ is the chemical that is being reduced in this reaction, whilst C6H6O5 is the component that is being oxidised.

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Answer: Metals

Explanation:

When an atom accepts an electron negative charge is created on atom and is called as anion.

When atom loses an electron positive charge is created on atom and is called as cation.

The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Thus metals form cations.

Answer:

Light and Sound can be considered as non-matter.

Explanation:

Various forms of Energy like Heat, Sound, Light can be considered as non-matter

The formula when converting g/mL to mg/L is to multiply the mass / volume value by 1e+6

When we do this we come up with 1,730,000

This however, should be written as either 1.73⋅10^5 or 1.73E+5.

Answer is B-  He can arrange the beads into various formations using different colors and sizes multiple times

Explanation: I hope the helped!

Peter can arrange the beads into various formations using different colors and sizes multiple times.

The periodic table, also known as the periodic table of the elements, is a tabular display of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is generally seen as an icon of chemistry.

In order to show how compounds form in nature, the beads will be assigned to the different elements on the periodic table according to the following arrangements;

With the above arrangements, it will be possible to show the affinity and proportion of the elements in the compound formed in nature.

Therefore, Peter can arrange the beads into various formations using different colors and sizes multiple times.

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The number of moles of sodium (Na) in 3.4 x 10^23 atoms is approximately 5.64 moles.

In the first paragraph, the main answer is that there are approximately 5.64 moles of sodium (Na) in 3.4 x 10^23 atoms.

Now, let's explain the calculation in the second paragraph. The mole is a unit of measurement used in chemistry to quantify the amount of a substance. One mole of any element contains Avogadro's number of atoms, which is approximately 6.022 x 10^23. In this case, we have 3.4 x 10^23 atoms of sodium (Na). To convert this into moles, we divide the number of atoms by Avogadro's number.

Mathematically, the calculation is as follows:

Moles of Na = (Number of atoms of Na) / (Avogadro's number)

Moles of Na = (3.4 x 10^23) / (6.022 x 10^23)

Moles of Na ≈ 5.64 moles

Therefore, there are approximately 5.64 moles of sodium (Na) in 3.4 x 10^23 atoms.

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If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

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Answer:

\(\huge\boxed{\sf n = 0.47 \ moles}\)

Explanation:

Given Data:

Mass in grams = m = 30 g

Molar mass of Cu = M = 63.5 g/mol

Required:

No. of moles = n = ?

Formula:

\(\displaystyle n = \frac{m}{M}\)

Solution:

Put the givens in the above formula:

n = 30 / 63.5

n = 0.47 moles

\(\rule[225]{225}{2}\)

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Considering the definition of empirical and molecular formula, the empirical formula is C₃H₅O₂ and the molecular formula is C₆H₁₀O₄.

The empirical formula or minimal formula is one that indicates the type of atoms that make up a compound, the minimum ratio of the integer number of atoms and not necessarily the exact number of atoms in it.

The molecular formula is the actual formula of the molecule and indicates the types of atoms and the number of each type involved in the formation of the molecule.

This formula can be obtained from the empirical or minimal formula, as long as the molecular mass of the compound is known. That is, divide the estimated molecular mass divided by the molecular mass of the empirical form. With the multiple obtained, we proceed to multiply the subscripts of the empirical formula, thus obtaining the molecular formula of the compound.

In this case, you know:

Assuming a 100 grams sample, the percentages match the grams in the sample. So you have:

Then it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:

The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:

The empirical formula must be expressed using whole number relationships, so:

Therefore the C: H: O mole ratio is 3: 5: 2

Finally, the empirical formula is C₃H₅O₂.

The molar mass of adipic acid is 146.1 g/mol and the molar mass of empirical formula is 69 g/mole.

Dividing the estimated molecular mass divided by the molecular mass of the empirical form, you get:

146.1 g/mol÷ 69 g/mol ≅ 2

This means that in the molecular formula there are 2 unit formulas, so it is necessary to multiply the number of all atoms by 2:

Molecular formula= 2×C₃H₅O₂

Molecular formula= C₆H₁₀O₄

The molecular formula is C₆H₁₀O₄.

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Answer:

cooling of surroundings

Explanation: