g state whether the ph will be acidic, basic or neutral at the equivalence point for the following titrations, and explain why. a) strong acid vs. strong base. b) strong acid vs. weak base. c) weak acid vs. strong base. d) weak acid and weak base

The concentration of the sodium chloride solution is 0.00425 mol/L or 4.25 mM (millimolar).

To calculate the concentration of the solution, we need to determine the amount of solute (sodium chloride) per unit volume of solution.

We are given that 3 grams of sodium chloride are dissolved in enough water to make 12 liters.

First, we need to convert the mass of sodium chloride to moles:

- molar mass of NaCl = 58.44 g/mol

- moles of NaCl = mass/molar mass = 3 g / 58.44 g/mol

                          = 0.051 mol

Next, we need to calculate the concentration of the solution, which is expressed in units of moles per liter (mol/L):

- concentration = moles of solute / volume of solution

                         = 0.051 mol / 12 L

                         = 0.00425 mol/L

Therefore, the concentration of the sodium chloride solution is 0.00425 mol/L or 4.25 mM (millimolar).

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The goal of this experiment is to determine the reaction rate, for the oxidation of iodide by persulfate.

To achieve this, you would first conduct a series of experiments under varying conditions, such as different concentrations and temperatures. By observing how the rate of reaction changes with these variables, you can establish the reaction rate and rate law. The reaction mechanism can be deduced by analyzing the intermediates and steps involved in the conversion of reactants to products.

Meanwhile, the activation energy can be determined from the temperature dependence of the reaction rate, typically through an Arrhenius plot. Lastly, the frequency factor, which represents the frequency of collisions between reactant molecules, can be calculated using the activation energy and rate constant. Together, these parameters provide valuable insights into the oxidation of iodide by persulfate, allowing for a comprehensive understanding of this important reaction. So therefore the goal of this experiment is to determine the reaction rate, for the oxidation of iodide by persulfate.

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A buffer solution can resist a change in pH even when a strong acid or a strong base is added to it. A buffer solution is made up of a weak acid and its conjugate base, or a weak base and its conjugate acid.A hydrofluoric acid-sodium fluoride buffer solution can be made from hydrofluoric acid and sodium fluoride.

The buffer solution can be calculated as follows: Hydrofluoric acid is a weak acid, with a Ka of 7.1 × 10−4.Moles of Hydrofluoric acid (HF) = 0.30 × VolumefHF = [HF]/V = 0.30 mMoles of sodium fluoride (NaF) = 0.70 × VolumefNaF = [NaF]/V = 0.70 mMoles of Hydrogen Fluoride (H+) = Molarity × Volume = 0.30 × VolumepH = pKa + log ([A-]/[HA])Ka = [H+][A-]/[HA]7.1 × 10−4 = [H+][NaF]/[HF][H+] = 5.3 × 10−4[Naf]/[HF] = 7/3log [NaF]/[HF] = log (7/3) = 0.851pH = pKa + log ([A-]/[HA])pH = 3.86 + 0.851 = 4.71Therefore, the pH of a buffer solution made from equal amounts of 0.30 M hydrofluoric acid and 0.70 M sodium fluoride is 4.71.

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Answer:

Change in colour is a chemical change.

Explanation:

Because when two substances combine chemically, they create (a) new substance(s) that have/has different molecular structures from the parent substances, thus mostly likely absorb and reflect light in different ways.

Answer:

25.91 L

Explanation:

P1V1= P2V2

748 (26.5) =  765 ( V2)      V2 = 25.91 LITERS  

Answer:

A. Wild life survey

Explanation:

The only answer that involved observing the wild life

An amino acid's four primary components are: The amino group (-NH2) is a fundamental functional group composed of a nitrogen atom linked to two hydrogen atoms. It is found on the amino acid's alpha carbon atom.

The carboxyl group (-COOH) is an acidic functional group made composed of a carbon atom coupled to two oxygen atoms (one of which is double-bonded) and a hydroxyl group (-OH). It's at the other end of the alpha carbon from the amino group. The R group (side chain) is a changeable functional group that distinguishes one amino acid from another. It is found on alpha carbon and can be as simple as a single hydrogen atom or as complicated as a big, organic compound.  molecule. Hydrogen atom (-H): This is the fourth component of an amino acid and is located on the alpha carbon along with the amino group, carboxyl group, and side chain. These four components are joined together by covalent bonds to form an amino acid. There are 20 different amino acids that are commonly found in proteins, each with a unique side chain that gives it specific chemical properties.

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When the concentration of CH3Br is doubled, the new rate of the reaction is 0.062 M/s.

According to the given problem, the concentration of CH3Br and NaOH is 0.160 M and the rate of the reaction is 0.0050 M/s. We have to determine the rate of the reaction if the concentration of CH3Br is doubled.The given chemical reaction is:

CH₃Br + NaOH ⟶ CH₃OH + NaBr

Firstly, we can find the rate constant of the reaction at given concentration using the given rate equation.The rate equation is given as:

r = k[CH₃Br][NaOH]

where r is the reaction rate, k is the rate constant and [CH₃Br] and [NaOH] are the concentrations of CH₃Br and NaOH respectively.Substituting the given values into the rate equation, we get;

0.0050 M/s = k(0.160 M)²

From the equation above, we can find the value of k:

k = r / [CH₃Br][NaOH] = 0.0050 M/s / (0.160 M)² = 1.95 M⁻²s⁻¹.

Now, if the concentration of CH₃Br is doubled, then the new concentration of CH₃Br is 2 x 0.160 M = 0.320 M. The concentration of NaOH remains the same at 0.160 M.Using the same rate equation above, but with the new concentration of CH₃Br and the original concentration of NaOH, we can find the new rate of the reaction:

r' = k[2(0.160)][0.160]r' = 2k[0.160]² = 2(1.95 M⁻²s⁻¹)(0.160 M)² = 0.062 M/s

Therefore, the new rate of the reaction is 0.062 M/s when the concentration of CH₃Br is doubled.

When the concentration of CH3Br is doubled, the new rate of the reaction is 0.062 M/s.

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Answer:

a

Explanation:

Answer:

B

Explanation:

If you break a mercury thermometer or spill mercury, you should NOT leave it for others to find, as mercury is a toxic substance. Instead, you should grab some paper towels, clean it up, and properly dispose of it to prevent exposure to mercury.

When using laboratory equipment such as a bunsen burner, it is important to follow proper safety procedures to prevent accidents and potential hazards. After you have finished using the bunsen burner, it is essential to turn it off to prevent any fire hazards. If you accidentally break a mercury thermometer or spill mercury, it is crucial to clean it up immediately as mercury is a toxic substance. You should never leave it for others to find, as this could lead to exposure and potential harm to anyone who comes into contact with it. Instead, you should use paper towels to clean up the spill and properly dispose of the contaminated materials. This helps to minimize the risk of exposure to mercury and keep the laboratory environment safe for everyone.

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Answer:

Potential energy is the energy in a body due to its position. While kinetic energy is the energy in a body due to its motion.

Answer:

PLEASE MARK ME AS THE BRAINLIEST

Explanation:

According to the 2n2 rule, the maximum number of electrons in the third period = 2 x (3)2 = 18. But, the last shell cannot accommodate more than 8 electrons so, the number of electrons in third period is 8. Hence, the number of elements is also 8.

The seeds from the cross of purebred plants grow into adult plants then the color of the flower they will make will be the same as the parents plant's flowers color.

When self-fertilization for several generations occurs in plants such that their specific traits under consideration remain unchanged are called true-breeding or pure-breeding plants. These are the ones that when undergoing self-pollination produces offspring with the exact traits.

Purebred is also known as homozygous and consists of gene pairs with genes that have the same traits. Hybrid is also known as heterozygous and has not the same gene pairs. Genotype is the actual gene makeup represented by letters. Phenotype is the physical appearance of a trait, such as a red or orange body color.

so we can conclude that the color of the flower seeds from the cross of purebred plants growing into adult plants will make will be the same as the parent parent plant's flower's color.

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Answer:

Ammonium bisulfate/Formula

(NH4)HSO4

Reason to answer:

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The non-polar compound is likely to have limited solubility in the aqueous layer and could be extracted using a non-polar organic solvent like dichloromethane or diethyl ether

a) Based on structural arguments, this compound is likely to have limited solubility in the aqueous layer. The molecule appears to be non-polar, as it has mostly C-H and C-C bonds with very few polar functional groups. In contrast, water is a polar solvent that readily dissolves polar and ionic compounds due to its ability to interact with charged or polar molecules. Therefore, it is unlikely that this non-polar compound would dissolve significantly in the aqueous layer, and it is more likely to partition into an organic solvent.

b) A common organic solvent that would be most suitable for extraction of this compound from water is a non-polar solvent such as dichloromethane (CH2Cl2) or diethyl ether (Et2O). The compound is non-polar and would preferentially dissolve in a non-polar solvent rather than the polar aqueous layer. Therefore, the organic solvent would form the top layer in the separation funnel, and the compound could be extracted into it by shaking the mixture and allowing the layers to separate.

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A lightweight metallic raceway without threads is called Electrical Metallic Tubing in the National Electrical Code. The correct option is A.  Electrical Metallic Tubing

In electrical and mechanical engineering, a conduit is a pipe or tube designed to hold and route electrical cables or wires. It is generally made of metal, plastic, or fiber and can be rigid or flexible. It is a lightweight metallic raceway without threads called Electrical Metallic Tubing in the National Electrical Code.

is used as an alternative to conduit piping, allowing for quicker installation and adjustment. EMT is used to protect wires from mechanical damage and to prevent the spread of fire. It's also used to keep wire bundles safe in walls, ceilings, and floors and to distribute electricity from a junction box to the rest of a building

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The term "polyatomic ion" tells us that we are working with a covalent covalent particle made of two or more atoms, joined to form a unit. Therefore, option B is correct.

Polyatomic ions are ions that have more than one atom. Nitrate ion, NO3-, for example, has one nitrogen atom and three oxygen atoms. A polyatomic ion's atoms are usually covalently bonded to one another and thus remain together as a single, charged unit.

Polyatomic ions are ions composed of two or more atoms joined by covalent bonds but with a net electron deficiency or surplus, resulting in an overall charge on the group.

Thus, option B is correct.

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Answer:

Opposite.

Water exhibits negative charge near hydrogen, positive near oxygen.

This is why it is OPPOSITE.

Let me know if this helps!

Water is a polar compound because it exhibits opposite charges. Therefore, option C is correct.

The term polar compound is defined as the compound with distinct regions of positive and negative charge, as a result of bonding with atoms such as nitrogen, oxygen, or sulfur.

Water is a polar compound because the covalent bonds between hydrogen and oxygen in the water molecule are polar in nature. Any molecule with lone pairs of electrons around the central atom is polar compound.

In water there are two atoms are present that are oxygen and hydrogen. Hydrogen has positive charge while oxygen has negative charge,

Thus, Water is a polar compound because it exhibits opposite charges, option C is correct.

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Answer:

B; 229g of Zn

Explanation:

To convert mol of Zn, we must find the atomic mass of Zn. This is 65.38.

Multiply 3.5 mol of zn by 65.38.

3.50 mol of Zn*65.38g = 228.83g of Zn

Therefore, the mass = 229g of Zn

Answer:

This answer is 108g mass of aluminum is produced from 100g of aluminum oxide

Answer:

Explanation:

CaCO₃     +     2HCl     →      CaCl₂    +    CO₂       +       H₂O

100 gm  +  2000 mL of M HCl

Amount of HCl remaining = .1018 M of 16.62 mL

= .1018 x 16.62 mL of M HCl

= 1.69 mL of M HCl

Initial HCl taken = 50 mL of .1035 M HCl

= 5.175 mL of M HCl

HCl reacted = 5.175 - 1.69 mL of M HCl

= 3.485 mL of  M HCl

2000 mL of M HCl reacts with 100 gm of CaCO₃

3.485 mL of M HCl will react with .174 grams of CaCO₃

percentage of calcium carbonate = .174 x 100 / .2027

= 85.84 %

The molecular formula of the unknown compound is C2H2O2.

To determine the molecular formula of the unknown compound, we need to calculate the empirical formula first and then find the multiple of its subscripts to obtain the molecular formula.

Given:

Percentage of carbon = 40.0%

Percentage of hydrogen = 6.7%

Percentage of oxygen = 53.3%

Molecular mass = 60.0 g/mol

Step 1: Convert the percentages to grams.

Assuming we have 100 grams of the compound:

Mass of carbon = 40.0 g

Mass of hydrogen = 6.7 g

Mass of oxygen = 53.3 g

Step 2: Convert the masses to moles using the molar masses of the elements.

Molar mass of carbon = 12.01 g/mol

Molar mass of hydrogen = 1.008 g/mol

Molar mass of oxygen = 16.00 g/mol

Number of moles of carbon = Mass of carbon / Molar mass of carbon

= 40.0 g / 12.01 g/mol

= 3.332 mol

Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen

= 6.7 g / 1.008 g/mol

= 6.648 mol

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen

= 53.3 g / 16.00 g/mol

= 3.331 mol

Step 3: Determine the empirical formula by dividing the moles by the smallest value.

Dividing the moles of carbon, hydrogen, and oxygen by 3.331 gives approximately 1 for each element.

So, the empirical formula of the compound is CHO.

Step 4: Determine the multiple of the subscripts to obtain the molecular formula.

To find the multiple, we divide the molecular mass by the empirical formula mass.

Molecular mass = 60.0 g/mol

Empirical formula mass = (12.01 g/mol) + (1.008 g/mol) + (16.00 g/mol) = 29.018 g/mol

Multiple = Molecular mass / Empirical formula mass

= 60.0 g/mol / 29.018 g/mol

= 2.07

Rounding to the nearest whole number, we get 2.

Therefore, the molecular formula of the unknown compound is C2H2O2.

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The equilibrium vapor pressure with respect to water (eow) is 259.9 Pa. assume that saturation vapor pressure is same as equilibrium vapor pressure.

Therefore, the RH at the frost point is  

RH = (eow / saturation vapor pressure) × 100

= (259.9 Pa / 259.9 Pa) × 100

= 100%

b) At T = -11 °C, we need to compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi) to determine if ice particles will form. From the given table, at T = -11 °C, the equilibrium vapor pressure with respect to water (eow) is 237.7 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 165.3 Pa.

The air is supersaturated with respect to ice, and the presence of Kaolinite particles can provide surfaces for water droplets to condense onto, leading to the formation of ice particles.

c) At T = -12 °C, we compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi). From the given table, at T = -12 °C, the equilibrium vapor pressure with respect to water (eow) is 217.3 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 181.2 Pa.

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Answer:

Compare your two units. The two units must measure the same thing.

For example, in the problem "convert 2 inches into centimeters," both inches and centimeters measure length. If your units measure two different things (like length and weight), you can't convert between them.

or

Look up the conversion. Before you can do the math, you need to know how much larger one unit is than the other.If the conversion you find has many decimal places, round to the nearest significant digit. If you don't know what a significant digit is, round to the second or third digit.

For example, if you need to convert 2 inches to centimeters, you need to know that 1 inch = 2.54 centimeters.

Explanation:

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In the presence of excess oxygen, there is a greater production of CO2 and ATP molecules compared  to the absence of oxygen in anaerobic

respiration.

Glucose is the energy molecule that is the end product of the digestion of carbohydrates. During cellular respiration, the glucose molecule is broken down to release carbon dioxide, water and ATP.

In the presence of excess oxygen, there is a greater production of CO2 and ATP molecules compared  to the absence of oxygen in anaerobic

respiration.

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Answer:

2.8 kg = 2.8 x 10^6 mg

Explanation:

Multiply the value in kilograms by the conversion factor (1000000) otherwise known as 10^6

So, 2.8 kilograms = 2.8 x 1000000 = 2.8 x 10^6 or 2800000 miligrams