how many milliliters of 0.0850 m naoh are required to titrate each of the following solutions to the equivalence point: (a) 40.0 ml of 0.0900 m hn03, (b) 35.0 ml of 0.0850 m ch3cooh, (c) 50.0 ml of a solution that contains 1.85 g of hcl per liter?

The sentence which is appropriate for a formal lab report in CHM113 lab is that three more trials were conducted and the data was recorded which is therefore denoted as option A.

This refers to a type of facility that provides controlled conditions in which scientific or technological research and experiments are performed by scientists etc.

The laboratory involves taking various measurements and data which are then analyzed so as to arrive at an accurate and logical conclusion about the experiment or research work being done.

Three more trials were conducted and the data was recorded is the appropriate sentence which is used because in lab report procedure as it involves collection of data under various types of conditions.

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When Pyruvate is used to form acetyl coa or ethanol in fermentation the third carbon atom forms carbon dioxide and gets released.

The simplest alpha-keto acid is pyruvic acid (CH3COCOOH), which has a carboxylic acid and a ketone functional group. The conjugate base pyruvate, CH3COCOO, is a metabolic intermediary found in many different cell-wide metabolic pathways.

Pyruvic acid can be produced from glucose via the process of glycolysis, returned to carbohydrates (such as glucose) via the process of gluconeogenesis, or transformed to fatty acids via acetyl-CoA interaction. Additionally, it can be fermented into ethanol or lactic acid and used to create the amino acid alanine.

When oxygen is present (aerobic respiration), pyruvic acid provides energy to cells through the citric acid cycle, also known as the Krebs cycle, and when oxygen is not present, pyruvic acid ferments to form lactate.

The pyruvate molecule is a three carbon compound. It converts into acetyl CoA in the presence of pyruvate dehydrogenase complex. The acetyl CoA is a two carbon molecule , so the third carbon atom forms carbon dioxide and gets released. So each pyruvate molecule that turns into acetyl CoA forms one molecule of CO2.

So,When Pyruvate is used to form acetyl coa or ethanol in fermentation the third carbon atom forms carbon dioxide and gets released.

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Answer: acidic solutions will turn litmus paper red; and an alkaline solution will turn litmus paper blue.

Explanation: Litmus paper is red when the pH is less than 4.5 and blue when the pH is greater than 8.3.

also frogs are great

The chemical species that is missing from the net ionic equation is the number of electrons.

We know that what we have in this case is a redox reaction. When we talk about a redox reaction we are talking about the kind of reaction where reduction and oxidation are both taking place at the same time. This implies that one of the species would accept the electrons and one of the species would donate the electrons.

Having said this, if we look at the reaction equation as it has been written, we can see that the specie that is missing here is the number of electrons that have been lost or gained in the course of the reaction as it has been written here.

We can only be able to infer this from the charges that the species that we can see in the reaction equation are carrying.

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a sample of he gas (2.35 mol) occupies 57.9 l at 300.0 k and 1.00 atm. the volume of this sample is l at 469 k and 1.00 atm  Option D: 57.9 . 81.64 L is the final volume at 423 K

The ideal gas relates to the pressure, temperature, pressure, and mole of the gas. The volume of the sample at 423 K and 1 atm is 81.64L.

Charles law gave the relation between the temperature and the volume of gas. According to him, the volume of the gas is directly proportional to the temperature of the gas.

Given,

Initial volume = 75.9 L

Initial temperature = 300 K

Final volume = ?

Final temperature = 423 K

The relation between the temperature and the volume of the two gases is shown as:

V1/T1= V2/T2

Substituting values in the above equation:

V2 = T2V1/T1

57.9 * 423 / 300

81.64L

Therefore, 81.64 L is the final volume at 423 K

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The temperature at 525.6ml is 236.52k

what is Charles law?

Assuming that the gas's pressure remains constant, the volume of a given mass of gas is precisely proportional to its absolute temperature. According to Charles' Law, a given amount of gas expands to a larger volume at constant pressure by a factor of 1/273 for every degree the temperature rises.

The formula for the relationship between volume and temperature is

V1 / T1 = V2 / T2, where V1 and T1 represent the starting volume and the absolute temperature, and V2 and T2 represent the end volume and the absolute temperature (the Kelvin temperature, not the Celsius temperature).

V1/T1 = V2/T2

V1= 525.6ml

T1= unknown

V2= 779ml

T2=351k

T1 =V1*(T2/V2)

    = 525.6ml * (351/779)

    =525.6*0.450

    =236.52k

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The  electron domains surround the C atom in this molecule is 4 electron domain. yes the molecule have a nonzero dipole moment.

The difluoromethane , CH₂F₂ have the 4 electron domains . the electron domains the are lone pairs and bond location around the particular atom present in the molecule. in the CH₂F₂ :

carbon have the valence electron = 4

Fluorine has the valence electron = 7

hydrogen has the valence electron = 1

Th CH₂F₂ has a tetrahedral geometry. the central atom Carbon has zero no. of lone pair and 4 bonded pair so, the electron domain is 4. yes the molecule have a nonzero dipole moment because of the unequal distribution of the charges.

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When water is added to an aldehyde in the presence of a base is, being electrophilic in nature makes this carbon atom vulnerable to nucleophilic attack; in contrast, oxygen is more electronegative in nature.

An atom's or functional group's propensity to draw electrons towards itself is known as electronegativity, and it is a chemical property. An atom's electronegativity is very often influenced by both its number of atoms and the separation of its valence electrons from its charged nucleus.

Electronegativity can also be described as the capacity of an atom in a covalent connection to pull shared electrons. The value of an element's electronegativity determines that how strongly it will attract electron pairs.

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The balanced reaction equation is given as;

[tex]2Al + 6HF(aq) ------- > 2AlF_{3} (aq) + 3H_{2} (g)[/tex]

We know that a chemical reaction has to do with the interaction between the reactants which would lead to the formation of the products. We know that one of the rules that govern a chemical reaction is that a reaction equation would be said to be balanced if the number of the atoms of each of the elements on the reactants side is the same as the number of the atoms on the products side.

The balanced reaction equation of the reaction between solid aluminum reacting with aqueous hydrogen monofluoride to produce aqueous aluminum fluoride and hydrogen gas has been shown above.

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Pyramidal is the electronic geometry (the arrangement of all electron pairs) around the central atom of nh3.

In chemistry, a trigonal pyramid is a molecular shape that resembles a tetrahedron and has one atom at the top and three at the corners of the base (not to be confused with the tetrahedral geometry). The molecule belongs to point group C3v when all three of the atoms in the corners are the same. The pnictogen hydrides (XH3), xenon trioxide (XeO3), the chlorate ion, ClO 3, and the sulfite ion, SO2 3 are some molecules and ions with trigonal pyramidal structure. Trigonal pyramidal-shaped molecules are sometimes referred to as sp3 hybridized in organic chemistry. According to the AXE technique for the VSEPR theory, the classification is AX3E1.

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One explanation for the vision of blue and green colors in the flame when students in chemistry class used this test to determine the identity of an unknown substance is that the sample contains barium and copper (I).

It is an analytical method used in chemistry to identify the presence of certain elements, mainly metal ions.

The principle of this test is based on the characteristic emission spectrum of each element, although the color of the flame can also vary due to temperature.

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Percent by mass of potassium in the initial mixture: 29.8%

solution:

1.913 gm AgCl = mass / molar mass = 1.913 / 143.32 = 0.0133 mole.

let x gm KCl and (0.8870 - x) gm NaCl.

x gm KCl = x / 74.55 mole.

(0.8870 - x) gm NaCl = (0.8870 - x) / 58.5 mole.

x / 74.55  + (0.8870 - x) / 58.5 = 0.0133

x + 1.274 * (0.8870 - x) = 0.0133 * 74.55

x + 1.274 * (0.8870 - x) = 0.9915

0.274 x = 0.1385

x = 0.506 gm

so mass of  KCl = 0.506 gm

0.506 gm KCl contains = 39 * 0.506 / 74.55 = 0.265 gm potassium.

% of K = 0.265 * 100 / 0.8870 = 29.8 %

Molar mass:

In chemistry, the molar mass of a compound is defined as the mass of a sample of that compound divided by the amount of substance. This is the number of moles in that sample measured in moles. Molar mass is a mass, not a molecule, a property of matter.

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Free radicals produced during biochemical reactions can serve as carcinogens if they are not neutralized by: Antioxidants.

Antioxidants are molecules that can effectively neutralize the harmful effects of free radicals. These free radicals are produced during biochemical reactions, and can cause damage to cells and DNA if left unchecked.

Antioxidants work by donating an electron to the free radical, thus neutralizing its reactivity and preventing it from causing further damage, such as a carcinogenic reaction. Antioxidants are found in many fruits and vegetables, as well as in supplements, and are essential for maintaining good health. Therefore, it is important to ensure that you are getting enough antioxidants in your diet in order to neutralize the harmful effects of free radicals.

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Magnesium is able to reduce copper, and copper is able to oxidize  magnesium. Zinc is able to oxidize  magnesium, and magnesium is able to reduce  zinc. Copper is able to oxidize zinc, and zinc is able to reduce  copper.

We know that the term oxidation and reduction would refers to the loss and gain of electrons. When electrons are lost we say that the specie has become oxidized and when electrons are gained we can say that the species have become reduced.

Thus when we talk about oxidation, we are talking about the increase in the oxidation number of the object and when we talk about reduction, we are talking about the decrease in the oxidation number of the object.

With this knowledge, we can be able to fill in the blanks accordingly.

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When performing research, you should never believe everything a source says without checking it against another source of information.

Even very trustworthy sources can occasionally contain information that is inaccurate or biased. A good way to corroborate the information is checking it against another source. If several sources agree on the information, it is likely that this is trustworthy.

Accuracy is the nearness of observed values or measured values to the true value. The difference between the measured and observed value gives the error incurred during the experimental procedure.

Therefore, When performing research, you should never believe everything a source says without checking it against another source of information.

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Water and dissolved minerals are conducted from the roots to the stems and leaves via xylem tissue, whereas sugar is conducted through specialized cells known as seive.

Xylem tissue carries water and inorganic nutrients from the soil to plant roots and stems. It consists of elongated cells with pointed ends called tracheids and shorter and wider cells called vascular elements. The walls of these cells are woody and have wall openings called pits.

Xylem transports and stores water and water-soluble nutrients in vascular plants. The phloem is responsible for the transport of sugars, proteins, and other organic molecules in plants. Vascular plants can grow taller than others due to the rigidity of the xylem cells that support the plant.

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The pressure of gas in a container is measured using a manometer with a tolerance of 0.509 atm. The pressure of an enclosed gas is measured using an open-end mercury manometer, like the one in this image.

However, unless clearly stated otherwise, a U-shaped tube that is partially filled with fluid is what is typically meant when using the term "manometer." To demonstrate how air pressure affects a liquid column in a laboratory experiment, you can quickly construct this kind of manometer. A manometer is a gauge used in science to measure pressure. The fourth and most basic state of matter is gas (the others being solid, liquid, and plasma). A pure gas might contain a single atom (e.g. a noble gas like neon).

The pressure of gas in a container is measured using a manometer is

(354*0.975 )- 344.65 = 0.509 atm.

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A manometer with a tolerance of 0.509 atm is used to measure the pressure of gas in a container.

However, The open-tube manometer is a U-shaped tube that is partially filled with fluid, usually mercury or water. Which is commonly intended when using the term "manometer" unless it is specifically indicated otherwise. This form of manometer can be easily built to demonstrate how air pressure influences a liquid column in a laboratory experiment.  The pressure that is measured is related to the difference in height of the fluid at the two ends of the U-shaped tube.

Finally pressure of gas in a container is measured using a manometer is

(354×0.975 )- 344.65 = 0.509 atm.

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1 = Make a list of the known quantities and formulate the issue.

2 = n=PVRT=0.987atm×0.677L0.08206L⋅atm/K⋅mol×296K=0.0275mol. Get the molar mass now by dividing g by mol.

At STP, the molar volume of a gas (22.4 liter/mole) and molar mass (22.4 lb/mole) are employed in the calculation D=M/V. Remember the Avogadro Principle for Gases (1811), which states that equal volumes of all gases under the same conditions contain the same amount of molecules.

PV = nRT, where n is the number of moles of the given gas, P is the gas's pressure, V is its volume, T is its absolute temperature, and P is the gas's volume.

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The length L of an edge of each small cube if adjacent cubes touch but don't overlap each other is 3.45 nm.

By the formula,

PV = Nkt

Where P is pressure, V is volume, N is number of molecules, k is Boltzmann constant and T is temperature in Kelvin.

T = 273 + 27 = 300 K

P = 101325 Pa

k = 1.38 × 10⁻²³ J/K

Now calculate the volume by,

V = (1 × 1.38 × 10⁻²³ × 300)/101325

⇒ V = 4.09 ×  m³

We know that, V = L³

So, L = V^1/3

Calculate the value of volume

L = (4.09/1000)^1/3

⇒ L = 3.45 × 10⁻⁹ m

Hence, the length of cube is 3.45 nm.

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Answer:

Fish that are carnivorous, or meat-eating, are more likely to contain harmful substances such as ciguatoxin because they feed on other fish that may have already accumulated the toxin. Herbivorous fish, on the other hand, feed on plant matter and are less likely to have accumulated harmful substances from their diet. This is because toxins tend to accumulate in the fatty tissues of animals, and carnivorous fish have a higher fat content than herbivorous fish. Additionally, carnivorous fish are typically higher up on the food chain, which means that they may have eaten several other fish that have accumulated toxins, further increasing the concentration of toxins in their tissues.

Explanation:

At STP, the air has a density of 0.0013 g/ml. Mass is measured by density. Density is calculated as d = mass/volume.

The abbreviation STP stands for standard temperature pressure. The best practice is to describe the standard and write out the precise conditions for each measurement because different industries and applications utilise different STP values. Records can be kept clear by stating the temperature and pressure parameters for each readout, inspection, and process. Although pure water vapour cannot exist at STP, a theoretical estimate for water vapour density at STP can be calculated using these dry air density data. Theoretically, 100% water vapour would have a density of 0.7618 kg/m3 or 62.19% of the density of dry air since pure water vapour has a density of 62.19%.

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The substances present before a chemical reaction takes place are Reactants.

When the reactants interact, one or more new products are created that are distinct from the reactants. However, in the chemical equation that depicts the reaction, the mass and charges are conserved, remaining constant on both sides of the equation.

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The electrode potential for copper is +0.34 V and for zinc -0.76 V.

Zinc has an electrode potential of -0.76 V, whereas copper has a potential of +0.34 V, With both electrodes acting anodically in relation to their respective local electrolytes, the voltmeter measures the sum of these two voltages, or 1.10 V, in an open circuit. Two electrodes are connected in a closed circuit, which allows current to flow. Copper functions as the galvanic cell's cathode, while zinc acts as its anode, supplying electrons (consuming electrons).

Copper electrode takes up copper atoms from the electrolyte as the zinc electrode dissolves (corrodes or oxidizes) (electroplating or reduction). This procedure keeps going as long as the circuit is closed.

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Matter can neither be created nor destroyed.

4Fe + 3O₂ → 2Fe₂O₃

Because this chemical equation complies with the rule of conservation of matter, there is the same number of atoms on both sides of the arrow.

The law of conservation of matter states that matter can neither be created nor destroyed. It just changes into different forms. Or in accordance with this law, the total mass of the products and reactants stays identical during any physical or chemical change. Therefore, it's crucial to maintain the same number of moles on both sides of the chemical reaction in order to uphold the rule of conservation of matter.

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Even though your question is incomplete, I believed you were referring to this type of question:

4Fe + 3O₂ → 2Fe₂O₃

In this chemical equation, why is the number of atoms the same on each side of the arrow?

a. Chemical reactions reduce matter but create energy.

b. Chemical reactions produce new matter.

c. Matter can neither be created nor destroyed.

The pH of a buffer solution that is 0.15 M chloroacetic acid (C2H3ClO2) and 0.10 M sodium

chloroacetate is 2.7.

Buffer Solution is defined as a water solvent based solution that is mostly consists of a mixture having weak acid and conjugate base of the weak acid, or in other word solution of a weak base and conjugate acid of the weak base.

The buffer solution always acidic or basic.

[H+] = Ka × [weak acid] / [salt] × valancy

[salt] = 0.10M

[weak acid] = 0.15M

Ka = 1.3 x 10-3

[H+] = 1.3 x 10-3 × 0.15/ 0.10

= 0.00195M

Now, as we know that

pH = -log[H+]

= -log(0.00195M)

= 2.7

Thus, we concluded that the pH of a buffer solution that is 0.15 M chloroacetic acid (C2H3ClO2) and 0.10 M sodium

chloroacetate is 2.7.

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Thalamus is in the charge of editing and sorting incoming sensory stimuli and controlling information entry into the cerebral cortex.

Thalamus is our body’s information relay station. All information from your body’s senses except smell must be processed through your thalamus before being sent to your brain’s cerebral cortex for interpretation. Your thalamus also plays a role in sleep, wakefulness, consciousness, learning and memory. Sensory impulses travel through nerve fibers from your body through brain structures to your thalamus. Specialized areas of your thalamus called nuclei, are each responsible for processing different sensory or motor impulses received from your body and then sending the selected information through nerve fibers to the related area of your cerebral cortex for interpretation.

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Answer:

the answer is B(conducting)

Explanation:

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Since the pH of solution is 7.25 , this solution will be little basic in nature, Hence option B is correct

.

Chemistry uses a quantitative scale known as pH to categorize substances as acidic, basic, or neutral. Acidic substances are those that have a pH value lower than 7. For instance, acidic foods like vinegar, tamarind, lemon, etc. More than 7 means that the substance is basic in nature. Basic components like baking soda, limewater, ammonia, etc. are only a few examples. Contrarily, substances with a pH value of 7 are neutral in nature since they fall into neither the basic nor the acidic categories. such as pure water.

Hydrogen potential is referred to as pH. Highly potent bases can have a level more than 14, while extremely potent acids can have a level lower than 0.

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