a compound contains 85.65% Bi o and 7.79% F what is the empirical formula of this compound.

I think it's D

Hope that helps

Answer: B, the bonding in the compound is nonpolar covalent.

Explanation:

This is because with the same electronegativity, there is an equal sharing of electrons, which indicates that the bonding must be nonpolar.

The ideal gas equation gives the relation of the pressure and the volume of the gas with that of the moles and the temperature. Moles of oxygen in the lung are 0.026 moles.

The ideal gas equation states that moles of the substances are directly proportional to the pressure and volume but inversely to the temperature of the hypothetical gas.

The ideal gas equation can be given as,

\(\rm PV = nRT\)

Where,

Volume or the lung capacity (V) = 3.0 L

Pressure of the lungs (P) = 0.208 atm  

Gas constant (R) = 0.082057

Temperature of the air (T) = 295 K

Substituting values in the equation:

\(\begin{aligned}\rm n &= \rm \dfrac{PV}{RT}\\\\&= \dfrac{0.208 \times 3.0}{0.082057\times 295}\\\\&= 0.026 \;\rm moles\end{aligned}\)

Therefore, the number of the moles of the oxygen in lungs are 0.026 moles.

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If the pH of the solution is adjusted to 3.86 by the addition of concentrated NaOH, the lactate and lactic acid will be at equilibrium.

At this pH, lactate will be predominantly in its ionized form (lactate ion), while lactic acid will be predominantly in its unionized form. The concentration of lactate and lactic acid can be calculated using the Henderson-Hasselbalch equation: pH = pKa + log([lactate]/[lactic acid]).

Rearranging the equation: [lactate]/[lactic acid] = 10^(pH - pKa), At pH 3.86, the pKa of lactic acid is 3.86, so [lactate]/[lactic acid] = 10^(3.86 - 3.86) = 1
This means that the concentration of lactate and lactic acid will be equal at equilibrium. The actual concentration will depend on the initial concentration of the solution and the amount of concentrated NaOH added to adjust the pH.

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To determine the concentration of lactate and lactic acid at equilibrium when the pH of the solution is adjusted to 3.86 by the addition of concentrated NaOH, follow these steps:

1. Identify the given information: The pH of the solution is adjusted to 3.86.

2. Recall the relationship between pH and pKa: pH = pKa + log([A-]/[HA]), where [A-] is the concentration of lactate (the conjugate base), and [HA] is the concentration of lactic acid (the weak acid). The pKa of lactic acid is approximately 3.86 as well.

3. Since pH = pKa, the equation becomes: 3.86 = 3.86 + log([lactate]/[lactic acid])

4. Subtract 3.86 from both sides: 0 = log([lactate]/[lactic acid])

5. Use the inverse log (or antilog) to solve for the ratio: 1 = [lactate]/[lactic acid]

6. This result indicates that the concentrations of lactate and lactic acid are equal at equilibrium when the pH is adjusted to 3.86.

In conclusion, when the pH of the solution in the above problem is adjusted to 3.86 by the addition of concentrated NaOH, the concentration of lactate and lactic acid will be equal at equilibrium.

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Answer:

Sulfur, Boron, Silicon, Sodium

Explanation:

Mass defect for oxygen-16 = 0. 13261 amu, in the kilograms the mass defect equals to 2.20 × 10⁻²⁸ kg.

Mass defect is the difference between the mass of of an whole atom and the combined mass of its individual particles present in that atom.

We know that, 1 amu = 1.6 × 10⁻²⁷ kg

Given that, mass defect for oxygen-16 = 0.13261 amu

To calculate this defect in terms of kilograms, we have to convert into kg unit as:

0.13261 amu = 0.13261 amu × 1.6 × 10⁻²⁷ kg/amu

0.13261 amu = 2.20 × 10⁻²⁸ kg

Hence option (2) is correct.

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Answer:

it’s B i just too the test

Explanation:

to activate metabolic processes that wouldn't happen on their own; to move chemicals across membranes that are necessary; and to do mechanical activity, like moving muscles.

Acetylation. A relatively frequent metabolic process that involves amino, hydroxyl, or sulfhydryl groups is acetylation. Acetyltransferases catalyze the process by transferring the acetyl group from acetyl-coenzyme A.

Anabolic and catabolic responses are the two different categories of metabolic processes. Protein synthesis in living things and the synthesis of carbohydrates in plants are examples of anabolic responses. Cellular respiration and glycolysis are examples of catabolic processes that occur in several species.

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To calculate the number of equivalents of Mg2+ in a solution, we need to divide the number of moles by 2, as each mole of Mg2+ contains 2 equivalents. In this case, the solution containing 2.50 mol of Mg2+ has 1.25 equivalents of Mg2+.

To answer this question, we need to know the definition of an equivalent. An equivalent is the amount of a substance that can combine with or replace one mole of hydrogen ions in an acid-base reaction. In the case of Mg2+, it can replace two hydrogen ions, so one equivalent of Mg2+ is equal to half a mole of Mg2+.
Given that the solution contains 2.50 mol of Mg2+, we can calculate the number of equivalents by dividing the number of moles by 2. This is because each mole of Mg2+ contains 2 equivalents, as we discussed earlier.
2.50 mol Mg2+ / 2 = 1.25 equivalents of Mg2+
Therefore, the solution that contains 2.50 mol of Mg2+ has 1.25 equivalents of Mg2+.

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Answer:

NaCl and Br2

Explanation:

Edge 2020

Answer:

The Answer is C: Na and Br3

Explanation:

Answer:

True. The limiting reagent is the reactant that is completely consumed in a chemical reaction and limits the amount of product that can be formed. The theoretical yield is the maximum amount of product that can be obtained from the limiting reagent, assuming that the reaction goes to completion and no side reactions occur. However, in practice, it is common for side reactions to occur, which can reduce the actual yield of the product. Therefore, while the limiting reagent does control the theoretical yield of a reaction, the actual yield may vary due to the presence of side reactions or other factors that can affect the efficiency of the reaction.

Explanation:

Answer:

The theoretical yield of urea = 120.35kg

The percent yield for the reaction = 72.70%

Explanation:

Lets calculate -

The given reaction is -

\(2NH_3(aq)+CO_2\) →\(CH_4N_2O(aq)+H_2O (l)\)

Molar mass of urea \(CH_4N_2O\)= 60g/mole

Moles of \(NH_3\) = \(\frac{62.8kg/mole}{17g/mole}\) (since \(Moles=\frac{mass of substance}{mass of one mole}\))

                     = 4011.76 moles

Moles of \(CO_2\) = \(\frac{105kg}{44g/mole}\)

                = \(\frac{105000g}{44g/mole}\)

                = 2386.36 moles

Theoritically , moles of \(NH_3\) required = double the moles of \(CO_2\)

    but , \(4011.76<2\times 2386.36\) , the limiting reagent is \(NH_3\)

Theoritical moles of urea obtained = \(\frac{1 mole CH_4N_2O}{2mole NH_3}\times4011.76 mole NH_3\)

                                                      = \(2005.88mole CH_4N_2O\)

Mass of 2005.88 mole of \(CH_4N_2O\) =\(2005.88 mole \times\frac{60g CH_4N_2O}{1mole CH_4N_2O}\)

                                                     = 120352.8g

                                                     \(120352.8g\times \frac{1kg}{1000g}\)

                                                     = 120.35kg

Therefore , theroritical yeild of urea = 120.35kg

Now , Percent yeild = \(\frac{87.5kg}{120.35kg}\times100\)

                                 72.70%

Thus , the percent yeild for the reaction is 72.70%

Glyphosate was initially thought to have no effect on human health because it primarily targets enzymes found only in plants and bacteria, not humans.

Additionally, the compound was believed to have a low toxicity level and was considered to be safe when used according to the labeled instructions.

However, recent scientific studies have suggested potential health risks associated with glyphosate exposure, including links to cancer and other health issues.

These studies have prompted further investigation and controversy surrounding the safety of glyphosate in herbicides.

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Answer:

The answer is Silver

Numbers of Protons in Silver: The element Silver (Symbol Ag) has the Atomic Number of 47. Any atom that contains exactly 47 protons in its nucleus is an atom of silver.

Hope this Helps!

The original cell density of the sample was 54,000 cells/mL. This means that for every 1 mL of the original sample, there were 54,000 cells. It is important to note that this calculation assumes that each colony arose from a single cell and that the cells were evenly distributed throughout the original sample. If there were clumps or aggregates of cells, this calculation may not be accurate.

To calculate the original cell density of the sample, we need to use the following formula:

Original cell density = (number of colonies / volume plated) * (1 / dilution factor)

Here, the volume plated is 0.1 mL, and the dilution factor is 1:100 (since we diluted 0.1 mL of the original sample into 9.9 mL of water). Therefore, the dilution factor is 1/100 = 0.01.

Substituting these values into the formula, we get:

Original cell density = (54 colonies / 0.1 mL) * (1 / 0.01)

Simplifying this, we get:

Original cell density = 54,000 cells/mL

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Hello! :)

Noble gases are located in group 8A in the periodic table.

Elements in this group contain 8 valence electrons, making them very stable elements. Some examples of elements in this group include Neon, Argon, and Krypton.

Characteristics that are most likely to be associated with individuals who are likely to vote in the next election include being over 45 years old, having a high school education or less, and having an income under $30,000.

Research and demographic studies have shown that older individuals tend to have higher voter turnout compared to younger age groups. Additionally, individuals with lower levels of education, such as high school or less, may be more inclined to participate in the electoral process. Similarly, those with lower income levels often have a higher motivation to vote, as they may have a stronger interest in policy issues that directly impact their financial well-being. However, it is important to note that these characteristics are not absolute indicators, as voting behavior can vary among individuals based on various factors and circumstances.

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Answer

The formula form of Manganese (IV) perbromate is

Explanation

The formula of Manganese is Mn

The formula for perbromate is BrO₄⁻

Oxidation number of Manganese (IV) = +4, That is Manganese (IV) is Mn⁺⁴

Therefore, multiply the charge of manganese by 1 and perchlorate by 4 t

Answer:

of what grade it is of??

Explanation:

tell me then ill answer

The concentration of Ca(OH)2 in the solution is approximately 1.33 x 10^(-6) M.

To find the concentration of Ca(OH)2 in a solution with a pH of 8.57, we need to use the concept of pOH, which is the negative logarithm of the hydroxide ion concentration ([OH-]). The pOH can be calculated by subtracting the pH from 14, which gives us 14 - 8.57 = 5.43.

Since Ca(OH)2 produces two OH- ions for every molecule of Ca(OH)2 that dissolves, the concentration of OH- ions will be twice the concentration of Ca(OH)2. Thus, we have [OH-] = 2x, where x represents the concentration of Ca(OH)2.

Taking the antilogarithm of the pOH, we find that [OH-] = 10^(-pOH) = 10^(-5.43).

Since [OH-] = 2x, we can write 2x = 10^(-5.43) and solve for x.

x = (10^(-5.43))/2 ≈ 1.33 x 10^(-6) M

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Answer:

True i think

Explanation:

Answer:

Yes

Explanation:

Water is an example because heat touches the bottom of the sea without being nullified

As an electron gets closer to the nucleus, the attraction to the nucleus gets stronger and this force of attraction is known as electrostatic force.

The attraction between an electron and a nucleus is due to the electrostatic force. The nucleus contains positively charged protons, while electrons are negatively charged particles. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

Therefore, as an electron gets closer to the nucleus, the distance between them decreases, which results in a stronger electrostatic force or attraction. This increased attraction causes the electron to be more tightly bound to the nucleus, leading to lower energy levels for closer electrons.

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Answer:

D)Calcium

Hope it help and is this the master A&P chapter 6?

Answer:

ok

Explanation:

The achiral amino acid is glycine. Glycine contains a hydrogen atom as its side chain, which implies it lacks stereocenters and is thus the only amino acid that is not chiral.

Proteins are made up of amino acids, which all have the same structure: an amino group (-NH2), a carboxyl group (-COOH), and a side chain (-R) connected to a core alpha carbon atom.

The side chain, commonly known as the R-group, differs amongst amino acids and dictates the chemical and physical characteristics of each. In some situations, the side chain can have a chiral centre, which means it can be linked to four distinct groups and exist in two mirror-image forms known as enantiomers.

Chiral amino acids can occur in two forms known as L and D enantiomers. The L form is more typically seen in proteins, but the D form is uncommon in nature. Conversely, achiral amino acids, such as glycine, lack a chiral centre on their side chain and so do not occur in enantiomeric forms.

Glycine's side chain is merely a single hydrogen atom, indicating that it is not chiral. As a result, glycine has no L or D forms and just one distinct structure.

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Answer:

To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity). The pH is then calculated using the expression: pH = - log [H3O+].

Example: Find the pH of a 0.0025 M HCl solution.

45.3  Kj is the correct answer

What is energy ?

Energy is a property of matter and radiation that is the ability to do work. It can take many forms, including thermal energy, light energy, mechanical energy, electrical energy, and chemical energy. Energy can be transformed from one form to another but cannot be created or destroyed, according to the law of conservation of energy. Energy is essential for many processes and activities in the natural world, such as photosynthesis in plants, movement of ocean currents, and generation of electricity in power plants. In physics, energy is often described as a scalar quantity and is typically measured in units of joules (J) or electron volts (eV).

q = mCdT = (370g)(4.184J/g/deg)(16.4deg) = 25389J = 25.389 kJ. Since you have 0.560 g of oil, the energy per gram is 25.389 kJ/0.560g = 45.34 kJ/g = 45.3 kJ/g (to 3 sig figs)

1 cal = 4.184 j so hopefully you can convert to calories and kcal etc.

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Above 15877 K (or 15603°C), the given reaction becomes nonspontaneous.To determine the temperature above which the given reaction becomes nonspontaneous,

we need to use the Gibbs free energy equation, which isΔG = ΔH - TΔSwhere,

ΔG = Gibbs free energy

ΔH = enthalpy change

T = temperature

ΔS = entropy change

Given,ΔH = -1036 kJΔS

= -153.2 J/K

We need to convert ΔS to kJ/K.ΔS = -153.2 J/K

= -0.1532 kJ/K

Plugging these values into the equation, we get:

ΔG = ΔH - TΔSΔG

= -1036 kJ - T(-0.1532 kJ/K)ΔG

= -1036 kJ + 0.1532 kJ/T

Multiplying both sides by -1, we get:

ΔG = 1036 kJ - 0.1532 kJ/T

We know that for a reaction to be spontaneous, ΔG must be negative.

Therefore, for the given reaction to be spontaneous, we can write:1036 kJ - 0.1532 kJ/T < 0

Multiplying both sides by T:

1036 kJ T - 0.1532 kJ T < 0T (1036 kJ) < 0.1532 kJ

Solving for T:T < 15877 K

Therefore, above 15877 K (or 15603°C), the given reaction becomes nonspontaneous.

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