calculate the volume in liters of a zinc oxalate solution that contains of zinc oxalate . round your answer to significant digits.

Viruses mutate to attack the vaccine molecules so new ones must be continually produced​ is why it's difficult to make for them.

This is defined as a  biological preparation that provides active acquired immunity to a particular infectious disease.

Viruses mutate and attack the vaccine molecules and continue its replication process which is why it's difficult to make vaccines for them.

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Answer: The ground state electronic configuration of an atom having atomic mass number 37 and number of neutrons 20 is \(1s^22s^22p^63s^23p^5\)

Explanation:

Atomic number is equal to the number of protons.

Mass number is the sum of number of neutrons and number of protons.

Mass number =  number of neutrons + number of protons

37 = 20 + number of protons

number of protons = 17

The atomic number is specific to an element, and the element with atomic number 17 is chlorine.

Electronic configuration represents the total number of electrons that a neutral element contains.

\(Cl:17:1s^22s^22p^63s^23p^5\)

Answer: (F) chemical energy

Explanation:

Answer:

its d, forming a hypothesis is always one of the first things you do, and d is the best answer from these 4

Answer:

D. A scientist should form a hypothesis, then conduct an experiment

The free energy change for the given reaction is - 193.96 KJ when entropy and temperature are given.

A measure of the unusable energy in a closed thermodynamic system that is also frequently regarded as a measure of the system's disorder, a characteristic of the system's state, and that varies inversely with the system's temperature and immediately with any reversible change in heat in the system.

The quantity of internal energy within a thermodynamic system that is readily used for work is referred to as free energy. Thermodynamic free energy comes in a variety of forms: The energy that can be used to produce work in a system with constant temperature and pressure is known as Gibbs free energy.

ΔS (universe) = ΔS (surrounding) + ΔS (system) ------- (1)

ΔS (surrounding) = heat change in surrounding/T(surrounding)-----(2)

ΔH (surrounding) = - ΔH (system)

T(system) = T(surrounding)

from equations 1,2 and 3

ΔS(universe) = -ΔH(system)/T(system) + ΔS(system)

T(system) ×ΔS(universe) = -(ΔH(system) + ΔS(system) ×T

-T(system) ×ΔS(universe) = ΔH(system) - T × ΔS(system) = ΔG°

ΔG° = -T(system) ×ΔS(universe)

      = -373K × 520J/K

      =  - 193,960 J

      =  - 193.96 KJ

Hence, the free energy change for the given reaction is - 193.96 KJ.

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Answer: B

Explanation: Because it has 4  things to up down right and left

Answer:

⁶¹₂₉Cu + ⁴₂He --->⁶⁵₃₁Ga

Explanation:

Nuclear reactions are reactions which occur with changes in the nucleus of an atom. Nuclear reactions usually occur with the release of large amounts of energy and radiation. Radiactive elements are elements that are involved in nuclearbreactions due to the unstable nature of their nucleus. They disintegrate spontaneously with the emission of radiations. The major types of radiations released during nuclear reactions are;

1, Alpha particles - these are positively charged radiations with strong ionizing power. Each alpha particle is a helium nucleus

2. Beta particles - these are very fast moving stream of electrons. They are negatively charged particles .

3. Gamma radiation - is a form of electromagnetic radiation.

In the alpha absorption of Cu-61, the proton number of the atom increases by 2 while the mass number increases by 4 and the Cu-61 atom is changed to Ga-65 atom. The nuclear equation is given as follows:

⁶¹₂₉Cu + ⁴₂He --->⁶⁵₃₁Ga

Answer:

the forces i think

Explanation:

The absorption of a free moving neutron by the atoms nucleus

(A P E X)

Answer:

725000

Explanation:

hope you find this helpfull

Answer: The reaction that occurs at anode is \(Zn(s)\rightarrow Zn^{2+}(aq.)+2e^-\)

Explanation:

Given : \(E^o_{Zn^{2+}/Zn}=-0.76V\)

\(E^o_{Cu^{2+}/Cu}=+0.34V\)

The substance having highest positive reduction potential will always get reduced and will undergo reduction reaction. Here, copper will undergo reduction reaction will get reduced.

The substance having highest negative reduction potential will always get oxidised and will undergo oxidation reaction. Here, zinc will undergo oxidation reaction will get oxidised.

Oxidation reaction occurs at anode and reduction reaction occurs at cathode.

Oxidation half reaction (anode) : \(Zn(s)\rightarrow Zn^{2+}(aq.)+2e^-\)

Reduction half reaction (cathode) : \(Cu^{2+}(aq.)+2e^-\rightarrow Cu(s)\)

Answer:

here you are

Explanation:

Fertile soil has the following characteristics: It is rich in nutrients necessary for basic plant nourishment. This includes nitrogen, phosphorus and potassium. It consists of adequate minerals such as boron, chlorine, cobalt, copper, iron, manganese, magnesium, molybdenum, sulphur and zinc.

I copy ninja

The correct answer is:

B) Na⁺; Ca²⁺ for influx of ions.

An influx action potential that enters a presynaptic terminal activates Ca2+ channels and momentarily raises the local Ca2+ concentration in the presynaptic active zone. After activating synaptotagmins Ca2+, neurotransmitter release occurs within a few hundred microseconds. Through the interaction of their C2-domains with phospholipids and SNARE proteins, synaptotagmins' two C2-domains bind Ca2+ and translate the Ca2+ signal into a nanomechanical activation of the membrane fusion machinery. Synaptotagmins cannot initiate exocytosis on their own; instead, they need a necessary cofactor known as complexin, a tiny protein that binds to SNARE complexes and simultaneously activates and clamps the SNARE complexes, setting them up for later synaptotagmin action.

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The products of complete combustion of hydrocarbons are carbon dioxide and water.

When hydrocarbons undergo complete combustion, the products are carbon dioxide (CO2) and water (H2O), making option B, "Carbon dioxide and water," the correct answer.

Complete combustion occurs when there is an ample supply of oxygen, leading to the oxidation of hydrocarbon molecules. Hydrocarbons consist of carbon and hydrogen atoms bonded together, and during combustion, they react with oxygen (O2) to produce carbon dioxide and water vapor.

The balanced chemical equation for the combustion of a generic hydrocarbon can be represented as follows:

CnHm + (n + m/4)O2 → nCO2 + (m/2)H2O

Here, n represents the number of carbon atoms, and m represents the number of hydrogen atoms in the hydrocarbon molecule. The combustion reaction results in the formation of carbon dioxide and water as the sole products.

The other options mentioned, such as carbon monoxide (CO) and sweet money for oil companies, are incorrect. Carbon monoxide is produced during incomplete combustion when there is a limited oxygen supply.

Additionally, the statement about oil companies earning money does not pertain to the products of combustion, but rather to the industry's financial implications.

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The wavelength of the blue light emitted by a mercury lamp with a frequency of \(6.88 \times 10^{14} Hz\) is approximately 436 nm.

The relationship between wavelength, frequency, and the speed of light is given by the equation:

\(\[c = \lambda \cdot f\]\)

where c is the speed of light, \(\(\lambda\)\) is the wavelength, and f is the frequency. Rearranging the equation to solve for \(\(\lambda\)\), we have:

\(\[\lambda = \frac{c}{f}\]\)

The speed of light, c, is approximately \(\(3 \times 10^8\)\) meters per second. Converting the frequency to Hz, we get \(\(6.88 \times 10^{14}\) Hz\). Plugging these values into the equation, we can calculate the wavelength:

\(\[\lambda = \frac{3 \times 10^8 \, \text{m/s}}{6.88 \times 10^{14} \, \text{Hz}}\]\)

Simplifying the equation, we find:

\(\[\lambda \approx 436 \, \text{nm}\]\)

Therefore, the wavelength of the blue light emitted by the mercury lamp is approximately 436 nm, which corresponds to option B.

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The binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond.  Option b

Aminoacyl-tRNA is a complex molecule that plays a crucial role in protein synthesis. It consists of a tRNA molecule covalently linked to an amino acid. The amino acid is attached to the 3' end of the tRNA molecule through an ester bond.

An ester bond is formed between the carboxyl group (-COOH) of the amino acid and the hydroxyl group (-OH) of the ribose sugar at the 3' end of the tRNA molecule. This ester bond is also referred to as an ester linkage. The formation of the ester bond is catalyzed by the enzyme aminoacyl-tRNA synthetase.

The ester bond in aminoacyl-tRNA is essential for protein synthesis. During translation, the aminoacyl-tRNA molecule carries the specific amino acid to the ribosome, where it is incorporated into the growing polypeptide chain. The ester bond is later hydrolyzed, releasing the amino acid for further use in protein synthesis.

In summary, the binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond between the carboxyl group of the amino acid and the hydroxyl group of the ribose sugar in the tRNA molecule.

Option b

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1.Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. 

2.Because predators were able to spot the light moths more easily, the dark moths were more likely to survive and reproduce. ... The peppered moth case is an example of natural selection. In this case, changes in the environment caused changes in the characteristics that were most beneficial for survival

Distillation technique is used to separate a mixture of two colorless liquids of varying boiling point.

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The first two chemical equations are reversible while the other two are irreversible.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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The number of moles of NaCl = 0.103

Given

6 gram sample of NaCl

Required

moles

Solution

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

mole = mass : molar mass

Molar mass of NaCl = 58.5 g/mol

Input the value :

mole = 6 g : 58.5 g/mol

mole = 0.103

\(\text{Molar mass of KBr},~ M = 119.002~ \text{g mol}^{-1}\)

\(\text{No. of moles,}~ n = 3~ \text{mol.}\\\\\text{Mass of KBr},~ w = nM = 3 \times 119.002= 357.006~ g\\\\\text{Hence, there are 357.006 grams in 3 moles of KBr.}\)

A primary explosive is a sensitive explosive that almost always explodes with a single ignition from a primary heat source of sufficient intensity, such as a spark, flame, impact, or other primary heat source.

Primary explosives can explode as a result of a spark or a relatively weak mechanical stress. They start the primary explosive when used as blasting caps (detonators). Additionally, they are loaded with friction-mixed materials and other ingredients in percussion caps.

A highly brisant starting explosive with a high triggering velocity is required. Mercury fulminate, lead azide, lead trinitroresorcinate, silver azide, diazodinitrophenol, and tetrazene, which is a primer additive, are the most significant primary explosives.

Only if they have already been pressed into capsules must initiation charges be transported.

Therefore, A primary explosive is a sensitive explosive that almost always explodes with a single ignition from a primary heat source of sufficient intensity, such as a spark, flame, impact, or other primary heat source.

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Answer:

To determine the percent composition by mass of sulfur in the compound MgSO4, we need to first determine the molecular weight of sulfur in this compound. The molecular weight of a compound is the sum of the atomic weights of all of the atoms in the compound. In the case of MgSO4, the molecular weight is equal to the sum of the atomic weight of magnesium, the atomic weight of sulfur, the atomic weight of oxygen, and the atomic weight of oxygen.

The atomic weight of magnesium is 24.31 grams per mole, the atomic weight of sulfur is 32.06 grams per mole, and the atomic weight of oxygen is 15.999 grams per mole. Therefore, the molecular weight of MgSO4 is equal to 24.31 + 32.06 + 15.999 + 15.999 = 98.369 grams per mole.

To determine the percent composition by mass of sulfur in this compound, we need to divide the molecular weight of sulfur in the compound by the molecular weight of the compound, and then multiply by 100%. In this case, the molecular weight of sulfur in the compound is 32.06 grams per mole, and the molecular weight of the compound is 98.369 grams per mole. Therefore, the percent composition by mass of sulfur in MgSO4 is equal to (32.06 / 98.369) * 100% = 32.5%.

This means that 32.5% of the mass of MgSO4 is due to the sulfur atoms in the compound. The remaining 67.5% of the mass is due to the magnesium, oxygen, and sulfur atoms.

The approximate difference between the largest and smallest angle measures is:∠M - ∠N ≈ 34.05° - 10.83° ≈ 23.22° Rounded to the nearest degree, the answer is 23°. Therefore, the correct option is 28°.

The largest and smallest angle measures in a triangle are always the angle opposite the longest side and the angle opposite the shortest side, respectively. Thus, in triangle MNO, the longest side is NO (15 units) and the shortest side is MO (18 units).

Therefore, the largest angle is ∠M, and the smallest angle is ∠N.

Using the law of cosines, we can find the measure of angle ∠M as follows:

cos ∠M = (NO² + MO² - MN²) / (2 × NO × MO)

cos ∠M = (15² + 18² - 20²) / (2 × 15 × 18)

cos ∠M = 0.80556

∠M = cos⁻¹(0.80556)

∠M ≈ 34.05°

Using the law of sines, we can find the measure of angle ∠N as follows:sin ∠N / NO = sin ∠M / MOsin ∠N / 15 = sin 34.05° / 18sin ∠N ≈ 0.18881∠N ≈ sin⁻¹(0.18881)∠N ≈ 10.83°

Therefore, the approximate difference between the largest and smallest angle measures is:∠M - ∠N ≈ 34.05° - 10.83° ≈ 23.22°Rounded to the nearest degree, the answer is 23°.Therefore, the correct option is 28°.

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When the dry ingredients of a cake are combined, the result is a mixture. Option 3.

In chemistry, mixtures are substances that are obtained by mixing two or more chemically different substances together with each substance maintaining its chemical identity. In other words, the components of a mixture are still chemically unique and can be separated by physical means.

Mixtures can be homogeneous or heterogeneous. Homogenous mixtures are mixtures in which the components are uniformly dispersed throughout the entire mixture. For heterogeneous mixtures, the components are not uniform throughout the mixture.

Thus, when the dry ingredients of a cake, such as flour, sugar, etc., are combined, what we are going to have is a mixture. Whether this mixture would be homogenous or heterogeneous will depend on the level of mixing. Whatever the case may be, the components can still be separated by physical means.

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Answer:

36 electrons

Explanation:

Answer:

By far the most abundant volcanic gas is water vapor, which is harmless. However, significant amounts of carbon dioxide, sulfur dioxide, hydrogen sulfide and hydrogen halides can also be emitted from volcanoes

Explanation:

Answer:

The final total pressure in the cylinder = 8.53 atm

Explanation:

From the information given:

The volume of liquid ethanol = 22.5 mL

The density of the liquid ethanol = 0.789 g/mL

The volume of the cylinder = 10.0 L

The pressure of the cylinder = 4.50 atm

The temperature of the cylinder = 25°C = (273.15 + 25) K = 298.15 K

Using the ideal gas equation:

PV = nRT

where n is the number of moles before the reaction:

\(n = \dfrac{PV}{RT}\)

\(n = \dfrac{4.5 \ \times 10 }{0.08205 \times 298.15}\)

n = 1.8395 moles

Recall that:

Density = mass /volume

Thus; the mass of liquid ethanol = (Density × volume ) of liquid ethanol

the mass of liquid ethanol = 0.789g/mL  × 22.5 mL

the mass of liquid ethanol = 17.7525 g

Since we know the mass of the liquid ethanol =  17.7525 g and the standard molar mass of liquid ethanol = 46.07 g/mol

Then:

the number of moles of liquid ethanol = 17.7525 g / 46.07 g/mol

the number of moles of liquid ethanol = 0.38534 mol

The chemical equation for the reaction can be represented as:

\(C_2H_5OH + 3O_2 \to 2CO_{2(g)} + 3H_2O_{(g)}\)

From above 1 mole of ethanol react with 3 moles of oxygen to produce 2 moles of carbon dioxide and 3 moles of water

Since each mole of ethanol reacts with 3 moles of oxygen

Then:

0.38534 mol of ethanol = (0.38534 mol × 3) oxygen

Therefore, the amount of oxygen molecule left in the cylinder after the reaction = 1.8395 mol - (0.38534 mol × 3)

= 1.8395 mol - 1.15602 mol

= 0.68348 mol

The number of moles of carbon dioxide formed = 2 × moles of ethanol

number of moles of carbon dioxide formed =  2 × 0.38534 mol

number of moles of carbon dioxide formed =   0.77068 mol

The number of moles of water vapour formed = 3 × 0.38534 mol

The number of moles of water vapour formed = 1.15602 mol

∴

The total moles of gas = moles of oxygen left + moles of water vapour + moles of carbon dioxide

The total moles of gas =  0.68348 mol + 0.77068 mol + 1.15602 mol

The total moles of gas = 2.61018 mol

Finally, to find the total pressure in the cylinder when the temperature is 125°C = (273.15 + 125)K

= 398.15 K

Then; using the ideal gas equation PV = nRT

P = nRT/V

P = ( 2.61018  × 0.08205 × 398.15 ) / 10

P = 85.2699/10

P = 8.52699 atm

P ≅ 8.53 atm

Answer:

Bi (Bismuth)

Ag (Silver)

Li (Lithium)

Explanation:

Xe (Xenon) and I (Iodine) are non-metals. They cannot from a metallic bond because metallic bonds are bonds between metals only.