the need to urinate frequently at night is a possible symptom of diabetes mellitus or benign prostate hyperplasia (bph). it is called oliguria

This means that the sodium bicarbonate in this experiment is the Excess reactant.

These are the elements or compounds which are involved in a chemical reaction and react to form the products.

The reactants were sodium bicarbonate and acetic acid with small amounts of the former being  unreacted at the bottom of the beaker means it's anm excess reactant.

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Answer:

the answer is A

Explanation:

in buffer we use weak acid that resist PH change and ethanoic acid i.e CH3COOH and sodium ethanoate i.e NACH3COO are examples

The potential energy in Joules of two Cl- ions that are separated by 629 pm is -1.50 x 10^-18 J or -1.50e-18 J.

Separation between two Cl- ions (d) = 629 pm = 629 x 10^-12 m

Charge on Cl- ions (q) = -1 x 1.602 x 10^-19 C (e = 1.602 x 10^-19 C)

The potential energy (U) of two point charges U = (1 / 4πε₀) x q1q2 / d

where ε₀ = 8.854 x 10^-12 C²/N m²

Therefore,U = (1 / 4πε₀) x q1q2 / d = (1 / 4π(8.854 x 10^-12) C²/N m²) x (-1 x 1.602 x 10^-19)² / (629 x 10^-12 m)= -1.50 x 10^-18 J or -1.50e-18 J (Joules)

Therefore, the potential energy in Joules of two Cl- ions that are separated by 629 pm is -1.50 x 10^-18 J or -1.50e-18 J.

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Answer:

0.04506 mol

Explanation:

For this problem, you need to convert grams to moles.  To do this, you need the molar mass, which is given.  Divide the mass by the molar mass to find the moles you have.

(5.001 g)/(110.98 g/mol) = 0.04506 mol

Answer:The Precambrian era envelopes the major bulk of the history of the Earth, beginning from the creation of the planet approx 4.5 billion years ago and terminating with the origination of composite, multicelled forms of life approximately 4 billion years after.

The Precambrian refers to the earliest of the geologic ages that are signified by the distinct layers of sedimentary rock. The Earth was about more than six hundred million years old when life started. The planet had cooled down from its native molten state, creating a solid crust and oceans formed by water vapor in the atmosphere.

At about three billion years ago, the atmosphere of the Earth was virtually devoid of oxygen. At approximately 2.4 billion years ago, oxygen was discharged from the seas as a waste product of photosynthesis by cyanobacteria. The levels of the gas slowly raised, attaining about 1 percent around two billion years ago.

Approximately 800 million years ago, the levels of oxygen attained about 21 percent and started to breathe life into more composite species. The oxygen-rich ozone layer was also created, protecting the surface of the Earth from the harmful solar radiation.

Explanation:i hope this helps! :)

Answer:

The Precambrian era envelopes the major bulk of the history of the Earth, beginning from the creation of the planet approx 4.5 billion years ago and terminating with the origination of composite, multicelled forms of life approximately 4 billion years after.

The Precambrian refers to the earliest of the geologic ages that are signified by the distinct layers of sedimentary rock. The Earth was about more than six hundred million years old when life started. The planet had cooled down from its native molten state, creating a solid crust and oceans formed by water vapor in the atmosphere.

At about three billion years ago, the atmosphere of the Earth was virtually devoid of oxygen. At approximately 2.4 billion years ago, oxygen was discharged from the seas as a waste product of photosynthesis by cyanobacteria. The levels of the gas slowly raised, attaining about 1 percent around two billion years ago.

Approximately 800 million years ago, the levels of oxygen attained about 21 percent and started to breathe life into more composite species. The oxygen-rich ozone layer was also created, protecting the surface of the Earth from the harmful solar radiation.

Explanation:

a sample of gas has a density of 4.5 g/l and a volume of 5.9 l.  the mass in g of the sample is 26.55g

A substance's mass per unit of volume is gauged by its density. This value is equivalent to the mass concentration of a pure substance. Different materials or substances have varying densities. The purity, buoyancy, and packing of the material might also be affected by this measurement. The mass of a material substance per unit volume is known as density. The equation d = M / V, where d stands for density, M for mass, and V for volume, describes density. Density is often measured in grammes per cubic centimetre.

given,

density=4.5g/l

volume=5.9l

d = M / V

4.5g/l=M/5.9l

4.5G*5.9=M

M=26.55g

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Answer:

a )Li

b)O

c)F

Explanation:

a) Li-1s^2 2s^1

F-1s^2 2s^2 2p^5

it is easy to pull out e- from 2p orbit than 2s because 2s orbit is close to nucleus.Therefore Li have high ionisation enthalpy

b)oxygen ion is larger than Na because o have fewer proton

c)F because it requires only 1e to achieve stable noble gas configuration.Therefore to achieve stable nobke gas electonic configuration it accept 1e.

Answer:

104 f

Explanation:

multiply 40 by 1.8 and then add 32

The rate of the reaction would be affected, and it would increase significantly when using excess hydrochloric acid.

Performing an SN1 reaction on a tertiary alcohol using 1 equivalent of hydrochloric acid is expected to result in a relatively slow reaction due to the stability of the carbocation intermediate.

However, if the same reaction is performed using 10 equivalents of hydrochloric acid, the rate of the reaction would increase significantly. This is because the excess acid would act as a catalyst and facilitate the formation of the carbocation intermediate,

thereby increasing the rate of the reaction. The excess acid would not react with itself, as it is not a reactive species in this context. However, it is important to note that using too much acid could lead to undesired side reactions and affect the overall yield of the reaction.

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Answer:

180°

Explanation:

You are starting at 125° W and ending at 55° E.

It might be easier to find the distance travelled by using a number line.

Numbers west are negative and numbers east are positive.

Start at -125 and go in jumps of 10 until you reach +55.

You make 18 jumps of 10° each for a total of 180°.

You have travelled a distance of 180°.

What you have just done is equivalent to saying:

distance travelled = end - start = 55° - (-125°) = 55° + 125° = 180°  

Diminished efficiency of the sodium-potassium pump due to hypoxia may be associated with hydropic change

Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal and belongs to group 1 of the periodic table. Its only stable isotope is Na. Free metals do not exist in nature and must be made from compounds.

Summary. Table salt is a combination of two minerals, sodium, and chloride. Your body needs some sodium to function properly. Helps nerves and muscles work. It also helps maintain proper water balance in the body. The kidneys control the amount of sodium in the body.

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Methanotrophs oxidize only methane completely, while methylotrophs can oxidize any compound containing a methyl group.

Methanotrophs and methylotrophs are two kinds of microorganisms that are equipped for oxidizing various sorts of mixtures.

Methylotrophs can oxidize any compound containing a methyl bunch, including methane. Interestingly, methanotrophs are a subset of methylotrophs that are explicitly adjusted to oxidize methane as their only wellspring of carbon and energy. Methanotrophs can totally oxidize methane to carbon dioxide, while methylotrophs can somewhat oxidize methane to carbon dioxide.

Methanotrophs can't oxidize different mixtures containing a methyl bunch, while methylotrophs can oxidize a more extensive scope of methyl-containing compounds. This is on the grounds that methylotrophs have a more different arrangement of chemicals that can oxidize different methyl-containing compounds. Methanotrophs, then again, have a particular arrangement of catalysts that are adjusted explicitly for the oxidation of methane.

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0.01059 moles of FeSO4 would be oxidized by 100.0 ml of 0.02118 mol/L KMnO4 solution.

To determine the number of moles of FeSO4 that would be oxidized by 100.0 ml of 0.02118 mol/L KMnO4 solution, we need to use the stoichiometry of the balanced equation and the given concentration of KMnO4.

The balanced equation for the oxidation reaction is:

5Fe2+ + MnO4- + 8H+ → 5Fe3+ + Mn2+ + 4H2O

According to the balanced equation, 1 mole of KMnO4 reacts with 5 moles of Fe2+. Therefore, the stoichiometric ratio is 1:5.

First, we need to calculate the number of moles of KMnO4 used:

Volume of KMnO4 solution = 100.0 ml = 0.1000 L

Concentration of KMnO4 = 0.02118 mol/L

Number of moles of KMnO4 = Concentration × Volume = 0.02118 mol/L × 0.1000 L = 0.002118 mol

Since the stoichiometric ratio is 1:5, 0.002118 mol of KMnO4 will react with 5 × 0.002118 mol of Fe2+.

Number of moles of Fe2+ = 5 × 0.002118 mol = 0.01059 mol

Therefore, 0.01059 moles of FeSO4 would be oxidized by 100.0 ml of 0.02118 mol/L KMnO4 solution.

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The pair of amino acids that can form a salt bridge at physiological pH is aspartic acid and histidine. Hence the correct option is (A).

A salt bridge is formed when the carboxylic acid group (-COOH) of one amino acid donates a proton (H+) to the amino group (-NH2) of another amino acid, which becomes positively charged. This creates an electrostatic attraction between the positively charged amino acid and the negatively charged carboxylate ion of the other amino acid. At physiological pH (around 7.4), the carboxylic acid group of aspartic acid (Asp) is deprotonated and has a negative charge, while the amino group of histidine (His) is protonated and has a positive charge. Therefore, Asp and His can form a salt bridge through electrostatic attraction between the negatively charged carboxylate group of Asp and the positively charged amino group of His. The other pairs of amino acids listed do not form salt bridges at physiological pH for the following reasons:

(B) Glutamic acid (Glu) and aspartic acid (Asp) both have negatively charged carboxylate groups at physiological pH, so they repel each other and do not form salt bridges.

(C) Two cysteines (Cys) can form a disulfide bond through the oxidation of their sulfur-containing side chains, but they do not form salt bridges.

(D) Arginine (Arg) has a positively charged guanidino group at physiological pH, while tyrosine (Tyr) has a neutral hydroxyl group. They do not have complementary charges to form a salt bridge.

(E) Lysine (Lys) has a positively charged amino group, while glutamic acid (Glu) has a negatively charged carboxylate group. They have complementary charges to form a salt bridge, but the pH is too low for Glu to be deprotonated and have a negative charge. Therefore, they do not form a salt bridge at physiological pH.

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Question - Which of the pairs of amino acids can form a salt bridge at physiological pH? Select from the following options:-

(A) aspartic acid and histidine

(B) glutamic acid and aspartic acid

(C) two cysteines

(D) arginine and tyrosine

(E) lysine and glutamic acid

Answer:

sulfur and water

Explanation:

sulfur + water --> sulfuric acid

^ reactants. ^ product

Two isotopes of any particular element differs on the count of number of neutrons present on its nucleus.

Isotopes are particular atomic species (or nuclides, as specialized term) of a similar component. They have a similar nuclear number (number of protons in their cores) and position in the occasional table (and subsequently have a place with a similar synthetic component), however contrast in nucleon numbers (mass numbers) because of various quantities of neutrons in their cores. While all isotopes of a given component have practically similar substance properties, they have different nuclear masses and actual properties.

The term isotope is framed from the Greek roots isos and topos , signifying "a similar spot"; consequently, the importance behind the name is that various isotopes of a solitary component possess a similar situation on the periodic table. It was begat by Scottish specialist and essayist Margaret Todd in 1913 in an idea to the English scientist Frederick Soddy.

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Answer:a

Explanation:

The NO₂ sample will occupy approximately 13.18 liters at the same temperature if the pressure is decreased to 225 mm Hg.

To solve this problem, we can use the combined gas law, which relates the initial and final conditions of pressure, volume, and temperature. The combined gas law equation is as follows:

(P1 * V1) / (T1) = (P2 * V2) / (T2)

Where:

P1 = Initial pressure

V1 = Initial volume

T1 = Initial temperature (in Kelvin)

P2 = Final pressure

V2 = Final volume

T2 = Final temperature (in Kelvin)

We know that,

P1 = 745 mm Hg

V1 = 4.00 L

T1 = 25°C = 25 + 273.15 = 298.15 K

P2 = 225 mm Hg

T2 = 298.15 K (same temperature)

Let's substitute the values into the combined gas law equation and solve for V2:

(P1 * V1) / (T1) = (P2 * V2) / (T2)

(745 mm Hg * 4.00 L) / (298.15 K) = (225 mm Hg * V2) / (298.15 K)

Cross-multiplying and rearranging the equation:

(745 mm Hg * 4.00 L) = (225 mm Hg * V2)

V2 = (745 mm Hg * 4.00 L) / (225 mm Hg)

V2 ≈ 13.18 L

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Answer:

2O L

Explanation:

The balanced chemical equation is 2NO+O  

2

​  

→2NO  

2

​  

Thus, 2 moles of NO will produce 2 moles of NO  

2

​  

.

Also, the volume is directly proportional to the number of moles.

Therefore, 20 L of NO will produce 20×  

2

2

​  

=20 L of NO  

2

​  

Formula of hydrated sodium carbonate : Na₂CO₃.10H₂O, so moles of water in one mole of hydrated salt = 10

Hydrate is a compound that binds water (H₂O), usually in the form of crystals/ solids

If these compounds are dissolved in water or heated, the hydrates can decompose:

Example: X.YH₂O (s) → X (aq) + YH₂O (l)

The formula for the hydrated compound contains: YH2O

The mole ratio shows the ratio of the coefficients of the hydrate compound

10.45 hydrated sodium carbonate(Na₂CO₃.xH₂O) were heated until 3.87 of 3.87of anhydrous (Na₂CO₃) remained, so

mass H₂O released :

\(\tt 10.45-3.87=6.58~g\)

mass Na₂CO₃ = 3.87 g

mol ratio Na₂CO₃(MW= g/mol) : H₂O(MW=18 g/mol) =

\(\tt \dfrac{3.87}{105,9888}\div \dfrac{6.58}{18}=0.0365\div 0.3655=1\div 10\)

Answer:

AMBANTOT MO MALIGO KANA

Answer:

NAP+ accepts hydrogen and releases oxygen.

That's just from my hunch

Explanation:

The light dependent reactions release oxygen from the hydrolysis of water as a by product.

The size of micropipette that you would select to deliver 215 microliters would be a micropipette with a volume range of 200-1000 microliters.

What is a micropipette?

A micropipette is a laboratory instrument used to measure and dispense small volumes of liquid, typically in the range of microliters (µL) or nanoliters (nL). They are commonly used in chemistry, biology, and biochemistry experiments, as well as in clinical and industrial settings.

Micropipettes consist of a handle, a digital or manual volume adjustment mechanism, and a tip that is placed into the liquid to be dispensed. They work by creating a vacuum or positive pressure inside the tip, which draws or pushes the liquid out of the tip.

Micropipettes come in different volume ranges and it is important to select the right one to ensure accurate delivery of the desired volume. For example, a micropipette with a volume range of 2-10 microliters would not be suitable for delivering 215 microliters, while a micropipette with a volume range of 200-1000 microliters would be more appropriate.

It's also important to note that, even if the micropipette is able to deliver 215 microliters, you should always check the calibration of the micropipette before use, to make sure that it's delivering the correct volume.

Hence, a micropipette with a volume range of 200-1000 microliters is suitable to deliver 215 microliters.

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Sodium chloride is an ionic compound because it is composed of ions, specifically sodium cations (Na+) and chloride anions (Cl-), which are held together by electrostatic forces.

When sodium chloride is dissolved in water, the polar water molecules surround the ions and separate them from each other.

This process is called hydration or solvation. The water molecules form a hydration shell around each ion, with the positively charged sodium ions surrounded by the negatively charged ends of water molecules (oxygen atoms), and the negatively charged chloride ions surrounded by the positively charged ends of water molecules (hydrogen atoms). This dissociation of the ionic compound in water leads to the formation of a solution that conducts electricity due to the presence of the separated ions. Overall, the dissolution of sodium chloride in water is an example of an ionic compound undergoing dissociation and solvation.

Sodium chloride (NaCl) is an ionic compound. When NaCl is dissolved in water, the sodium (Na+) and chloride (Cl-) ions separate from each other due to the polar nature of water molecules. The positively charged Na+ ions are attracted to the negative oxygen ends of the water molecules, while the negatively charged Cl- ions are attracted to the positive hydrogen ends of the water molecules. This results in the formation of a hydration shell around each ion, leading to the dissolution of NaCl in water.

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Answer: it attaches to the fur of an animal, and it sprouts after it falls from the animal’s fur

Explanation:

Answer:

wait are you talking about the bottom question??