Niacinamide (a.k.a. nicotinamide, and often referred to as vitamin B3. See Figure.) is a nitrogen containing organic molecule derived from niacin that makes its way into our metabolic pathways as coenzymes in the forms of NAD and NADP. It is also found in an acne treatment called Nicomide and some people take it as a nutritional supplement to combat high cholesterol. How many atoms of carbon are there in a 1317 mg dose of niacinamide? Enter your answer using scientific notation of the form 1.234e30 or 1.234e-30.
atoms of carbon

The release of a large amount of sewage and other organic wastes into a river would likely result in a sharp increase in the levels of organic matter.

When sewage is dumped into a river, it results in a high level of organic waste. This can be dangerous since it reduces the dissolved oxygen in the water. This occurs because bacteria decompose the organic matter, which uses up oxygen. When the levels of dissolved oxygen fall too low, fish and other aquatic organisms die.

The water's pH level is also lowered by the discharge of sewage into a river. The acids and other chemicals present in the waste are responsible for this. The water may become more acidic as a result of this, which can be harmful to both the water and the aquatic life that it contains. Sewage can be very harmful to human health as well. It may contain disease-causing bacteria and viruses that can spread quickly from one person to another.

Therefore, the release of a large amount of sewage and other organic wastes into a river would likely result in a sharp increase in the levels of organic matter.

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Answer:

A spectroscope breaks the light from a single material into its component colors the way a prism splits white light into a rainbow. It records this spectrum, which allows scientists to analyze the light and discover properties of the material interacting with it.

you decide to test your pillbugs' preference for an acidic environment versus a nonacidic environment. on one side of the chamber you place filter paper moistened with water. Dry filter paper is appropriate to place on the other side to test this variable.

Armadillidiidae (Pillbugs) is a family of woodlice, a terrestrial crustacean group in the order Isopoda. Unlike members of some other woodlice families, members of this family can roll into a ball, an ability they share with the outwardly similar but unrelated pill millipedes and other animals. This ability gives woodlice in this family their common names of pill bugs or roly polies.Other common names include slaters, potato bugs, and doodle bugs. Most species are native to the Mediterranean Basin, while a few species have wider European distributions. The best-known species, Armadillidium vulgare, was introduced to New England in the early 19th century and has become widespread throughout North America.

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Answer:

2 oxygen atoms make oxygen gas

A molecule of oxygen gas is composed of two oxygen atoms chemically bonded together. The symbol for oxygen is "O," and the atomic number is 8, indicating that each oxygen atom has 8 protons in its nucleus.

A covalent bond is a type of chemical bond that occurs between two atoms when they share one or more pairs of electrons. It is a strong bond that holds atoms together to form molecules.

In a covalent bond, atoms share electrons in order to achieve a more stable electron configuration, typically by filling their outermost energy levels (valence shells). By sharing electrons, both atoms involved in the bond can achieve a more stable configuration, similar to the noble gas configuration.

In an oxygen gas molecule, the two oxygen atoms are held together by a covalent bond. Covalent bonds involve the sharing of electron pairs between atoms. In the case of oxygen gas, each oxygen atom shares two electrons with the other oxygen atom, resulting in a stable molecule.

Therefore, a molecule of oxygen gas is made up of two oxygen atoms (O) bonded together by a covalent bond.

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The molar HCl concentration is 0.44 M.

Volume of NaOH solution in the burette at the start = 50 mL

Volume of NaOH solution in the burette at the end = 28 mL

Volume of NaOH solution dispensed = 22 mL

Volume of HCl solution in the flask = 5 mL

NaOH concentration = 0.100 M

To calculate the molar HCl concentration using the coarse titration results, we can use the following formula:

M₁V₁ = M₂V₂ where

M₁ = Molarity of NaOH, V₁ = Volume of NaOH used, M₂ = Molarity of HCl, V₂ = Volume of HCl used.

Before we apply the formula, let's calculate the volume of NaOH used by subtracting the final burette reading from the initial burette reading.

Volume of NaOH used = 50 mL - 28 mL = 22 mL

Now we can apply the formula:

M₁V₁ = M₂V₂

0.100 M × 22 mL = M₂ × 5 mL

M₂ = (0.100 M × 22 mL) / 5 mL= 0.44 M

Therefore, the molar HCl concentration is 0.44 M.

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Answer: Based on the stoichiometry 1 mole of carbon disulfide will produce 1 mole of carbon dioxide. Similarly we can apply the volume ratio, so 1.1L of carbon disulfide will produce 1.1L of carbon dioxide.

Answer:

sugar molecules......

From the thermal decomposition of a pure solid, you obtained a solid and a gas, each of which is a pure substance. From this information, you can conclude with certainty that the solid is a compound and the gas is an element. Thus, option (d) is correct.

Pure substances are elements and compounds, and each has its characteristics. A pure substance is a substance in which all of the atoms have the same number of protons. An element is a pure substance that cannot be broken down into smaller substances by chemical methods. Compounds are made up of two or more elements that are chemically combined. Their constituents are present in a particular proportion, and the proportion cannot be changed by physical means.

Therefore, from the thermal decomposition of a pure solid, you obtained a solid and a gas, each of which is a pure substance. Thus, the original solid must be a compound because it yielded two pure substances. Since one of the products is a gas, it must be an element. Therefore, the solid is a compound, and the gas is an element. So, the correct option is d.

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U has a total of six electrons. This corresponds to carbon (C). A is the second most common element in the atmosphere.

The second most common element in the atmosphere is oxygen (O). E is a noble gas.

Noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Based on the given options, E could be xenon (Xe).

S is an alkali metal.

Alkali metals include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). Based on the given options, S could be sodium (Na).

O is a halogen.

Halogens include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Based on the given options, O could be bromine (Br).

O has an atomic number larger than V but smaller than W.

Based on the periodic table, the atomic number of oxygen (O) is 8, which is larger than the atomic number of vanadium (V) (23) and smaller than the atomic number of tungsten (W) (74).

The charge on an L ion is +2.

The charge of +2 indicates that L must lose two electrons to form the ion. Based on the given options, L could be calcium (Ca).

C has five electrons in its outer energy fever.

Carbon (C) has four valence electrons, not five. This contradicts the given statement, so we need to revisit the deductions.

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The enthalpy of sublimation of solid a at 300 K is -37.4 kJ/mol.

To calculate the enthalpy of sublimation, we can use the Clausius-Clapeyron equation: ln(P2/P1) = (-ΔHsub/R)(1/T2 - 1/T1), where P1 and P2 are the vapor pressures at temperatures T1 and T2, respectively, R is the gas constant, and ΔHsub is the enthalpy of sublimation. Using the given values, we can solve for ΔHsub to get -37.4 kJ/mol.

To account for the temperature variation of ΔHsub, we can use the equation: ΔHsub(T2) = ΔHsub(T1) + ∫(Cp)dT, where Cp is the heat capacity and the integral is taken from T1 to T2. Using the given heat capacity data and integrating, we can calculate the enthalpy of sublimation at 300 K to be -38.5 kJ/mol.

The error in the constant T assumption can be estimated by comparing the two values of ΔHsub obtained in parts (a) and (b). The difference between them, which is 1.1 kJ/mol, represents the maximum possible error due to the constant T assumption.

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The following is the correct electron configuration for a ground-state atom of magnesium (atomic number 12) is 1s2 2s2 2p6 3s2. The correct option is C.

The electronic configuration is the organization of electrons in the different orbital shells of an atom. The orbital is divided into s, p, d, f, and k, l, m, and n shells. The electrons are present in these shells. These shells are different energy levels.

The electronic configuration tells the position of an electron in the shell of atoms. And they are written in the given way.

Like in magnesium, the electronic configuration is 1s2 2s2 2p6 3s2. There are 2 electrons in the s shell, and in the last s shell, there are two electrons are present. Magnesium has the atomic number 12.

Thus, the correct option is C. 1s2 2s2 2p6 3s2.

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Answer:

The density of the block is 2.827 grams/ cubic inch

Explanation:

The density of the block can be obtained by dividing the given mass of the block by its volume.

Density = mass / volume

The mass of the block given is 435.5 grams

The volume of the block can be obtained by using the formula:

Volume = Length X breadth X height

Volume = 3.5 X 8 X 5.5 = 154 \(in^3\)

There fore the density will be 435.5 / 154 = 2.827 grams/ cubic inch

Answer:

A substance is basic or alkaline if it's pH is greater than 7.0.

The maximum number of electrons that can populate a given orbital is two assuming that the pauli exclusion principle remains valid.

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Answer:

Nvr XD

Explanation:

Answer:

the world may never know

Explanation:

Answer:Intermolecular forces

Explanation:See in a molecule these intermolecular forces hold the atoms together which decides the rigidity of the material.

I hope the answer was helpful

0.039 moles of Chalk were used.

To find the number of moles of chalk used, we need to first calculate the change in mass of the chalk:

Change in mass = initial mass - final mass

Change in mass = 43.5 g - 39.6 g

Change in mass = 3.9 g

Next, we need to convert the change in mass to moles of CaCO3:

Molar mass of CaCO3 = 40.08 g/mol + 12.01 g/mol + 3(16.00 g/mol) = 100.09 g/mol

Moles of CaCO3 used = (Change in mass of CaCO3) / (Molar mass of CaCO3)

Moles of CaCO3 used = 3.9 g / 100.09 g/mol

Moles of CaCO3 used = 0.039 moles

Therefore, 0.039 moles of CaCO3 were used.

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Answer:

Carbon monoxide is a colorless, odorless, and tasteless flammable gas that is slightly less dense than air.

Answer:

Oxytocin is a peptide of nine amino acids (a nonapeptide). 

Explanation:

Answer:Oxytocin is a peptide of nine amino acids (a nonapeptide). The sequence is cysteine - tyrosine - isoleucine - glutamine - asparagine - cysteine - proline - leucine - glycine (CYIQNCPLG).

Explanation:

cde PLZ BRAINLEST PLZ

Answer:

I am not sure but I think it is D

Brainliest please ;-)

Answer:

NH₄Cl  ------> NH₃  +  HCl

Explanation:

Ammonium Chloride =(NH₄Cl

Ammonia = NH₃

Hydrochloric Acid = HCl

NH₄Cl  ------> NH₃  +  HCl

In decomposition reaction, the reactant is breaking down into smaller parts. In this case, all of the coefficients are 1. The reaction is already balanced.

The 2 mol Al moles of Fe2O3 are formed when 4.2 moles of Fe reacts completely with oxygen.

What is moles?

A mole is an extremely important unit of measurement for chemists. A mole of anything denotes 602,214,076,000,000,000,000,000 of that thing, just as possessing a dozen eggs denotes having twelve eggs. Chemists use moles to measure extremely small substances like atoms, molecules, and other particles.

What is oxygen?

Because oxygen contains only one type of atom, it is a chemical element, which is a type of substance. Since oxygen has an atomic number of 8, it is represented by the letter O in its formal chemical formula and has eight protons in its nucleus. In nature, molecular oxygen can be discovered.

2 mol Al, 3 mol Fe.

Therefore,  2 mol Al moles of Fe2O3 are formed when 4.2 moles of Fe reacts completely with oxygen.

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The frequency is 7.5 x 10¹⁴ Hz and the energy is 4.97 x 10⁻¹⁹ J of blue light that has a wavelength of 400 nm.

The length of the a wave is expressed by its wavelength. The wavelength is the distance between one wave's crest and the following wave's crest. The wavelength can also be determined by measuring from of the "trough" (bottom) with one waveform to the "trough" of the following wave.

v = c/λ

v = 3.0 x 10⁸/4.0 x 10⁻⁷

v = 7.5 x 10¹⁴ Hz

400 nm = 4.0 x 10⁻⁷

E = hv

E = (6.63 x 10⁻³⁴)(7.5 x 10¹⁴)

E = 4.97 x 10⁻¹⁹ J

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Based on the given information, we have:
(a) Syndiotactic with a degree of polymerization of 1000.
(b) Atactic with a degree of polymerization twice that of syndiotactic.
(c) Isotactic with a number-average molecular weight of 58,234.5 g/mol.

To calculate the percent crystallinity of the atactic material specimen, we need to compare its density to that of purely amorphous and purely crystalline structures.
The density of the purely amorphous structure is 2.0 g/cm³, while the density of the purely crystalline structure is 2.2 g/cm³.Let's assume the density of the atactic material is x g/cm³.
Using the formula for percent crystallinity:
Percent Crystallinity = (Density - Density(amorphous)) / (Density(crystalline) - Density(amorphous)) * 100
Plugging in the values, we get:
Percent Crystallinity = (x - 2.0) / (2.2 - 2.0) * 100
Now, to calculate the tacticity expected to crystallize the least, we need to compare the structures. The syndiotactic structure is expected to crystallize the least.
(a) For syndiotactic, the number of monomer units polymerized is 1000.
(b) For atactic, the degree of polymerization is twice that of syndiotactic, so it would be 2000.
(c) For isotactic, the number-average molecular weight is given as 58,234.5 g/mol.
(d) The number of carbon atoms in the atactic structure can be calculated by multiplying the degree of polymerization (2000) by the number of carbon atoms in each monomer unit.
(e) The number of chlorine atoms in the isotactic structure can be calculated by dividing the number-average molecular weight (58,234.5 g/mol) by the molecular weight of a single monomer unit and then multiplying by the number of chlorine atoms in each monomer unit.
To calculate the percent crystallinity, we need the measured density of the atactic material, which is given as 2.1 g/cm³.
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To use Stokes' Theorem, we need to calculate the circulation of the given field around the curve. First, we find the curl of the field by taking the partial derivatives of each component with respect to the corresponding variable. Then, we calculate the surface integral of the curl over the surface bounded by the given curve.

To use Stokes' Theorem, we first need to find the curl of the given field. Taking the partial derivatives of each component with respect to the corresponding variable, we find that the curl of f is given by curl(f) = (2y - 2z)i + (2x - 2y)j + (2x - 2y)k.

Next, we determine the orientation of the surface bounded by the given curve. This is important as it affects the sign of the surface integral in Stokes' Theorem. Once we have determined the orientation, we can proceed to calculate the surface integral of the curl over the surface bounded by the given curve.

The result of this surface integral gives us the circulation of the field around the curve. It quantifies the extent to which the field flows around the curve. By applying Stokes' Theorem, we are able to relate the circulation of the field to the surface integral of the curl, which simplifies the calculation process.

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Answer:

Alkaline Earth Metals

Explanation:

Answer:

Explanation:

Satellite acts as a relay station for earth sources. A transmission station sends the information to the satellite, which in turn retransmits to the receiving stations. The original signal being transmitted from the earth station to the satellite is called uplink of 6 GHz The retransmitted signal from the satellite to the receiving station is called downlink of 4 GH frequency. The transponder is the transmitter-receiver combination in a transponder.