Which polynomial expresses the difference of the two polynomials below? (8u7+5u5−5)−(4u7−8u5+4)

Answer:

1. is Molar (with capital M)

2. is molal (m)

Explanation:

By definition, 1 Molar solutions have 1 mol of solute in 1 L of solution and 1 molal solutions have 1 mol of solute in 1 Kg of solvent

Answer:

Screening

Explanation:

Screening is usually done in large amounts.

Thanks!!

Answer:

An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system. It may be a chemical process, such as dissolving ammonium nitrate in water, or a physical process, such as the melting of ice cubes.

Answer:

The answer is "\(0.157\ L\)"

Explanation:

Please find the complete question in the attached file.

\(M_1=13.5\ M\\\\V_1=58.0\ ml\\\\M_2=5.00\ M\\\\\)

Using formula:

\(M_1V_1=M_2V_2\\\\V_2 = \frac{(M_1V_1)}{M_2}\\\\\)

    \(= \frac{(13.5 \times 58.0)}{5.0}\\\\= 156.6 \ ml\\\\\)

    \(= \frac{156.6}{1000}\ L\\\\ =0.157\ L\\\\\)

INFORMATION:

We have the next compound:

- calcium nitrate

And we must find its molar mass using the periodic table

STEP BY STEP EXPLANATION:

First, we must identify the chemical formula for the compound:

- calcium nitrate: Ca(NO3)2

Second, we must identify the molecular weight of each element using the periodic table

- Ca: 40.08 g/mol

- N: 14.01 g/mol

- O: 16.00 g/mol

Third, We must replace the molecular weights in the chemical formula multiplying by the subscript

Finally, we must simplify and the result will be the molar mass of calcium nitrate

So, the molar mass would be 164.01 g/mol

ANSWER:

164.10 g/mol

To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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Phosphatidylserine is a type of phospholipid that is mainly found in cell membranes. Its structure is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule.

The fatty acid chains are hydrophobic, meaning they repel water, while the phosphate group and serine molecule are hydrophilic, meaning they attract water.

The glycerol molecule acts as a bridge that connects the two fatty acid chains to the phosphate group and serine molecule.
The structure of phosphatidylserine is important for its function in the cell membrane.

Because of the hydrophobic and hydrophilic components of its structure, phosphatidylserine is able to form a lipid bilayer, which is a barrier that separates the inside of the cell from the outside environment.

The hydrophilic heads of the phosphatidylserine molecules face outward and interact with water, while the hydrophobic tails face inward and repel water.
Phosphatidylserine also plays a role in cell signaling and apoptosis, which is programmed cell death.

It acts as a signaling molecule by binding to proteins that are involved in cellular pathways.

In addition, phosphatidylserine is translocated to the outer leaflet of the cell membrane during apoptosis, which signals to immune cells that the cell is ready to be removed.
In conclusion, the structure of phosphatidylserine is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule. Its hydrophobic and hydrophilic components allow it to form a lipid bilayer in cell membranes, and it also plays a role in cell signaling and apoptosis.

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To determine the concentration of vinegar (acetic acid) based on the titration with sodium hydroxide, we need to use the concept of stoichiometry and the volume and concentration of the sodium hydroxide solution.

Let's assume that each drop of the sodium hydroxide solution is approximately 0.03 mL. Based on this assumption, the volume of sodium hydroxide solution used would be:

Volume of NaOH = 43 drops × 0.03 mL/drop = 1.29 mL

Now, we need to determine the moles of sodium hydroxide used in the titration. Using the volume and concentration of the sodium hydroxide solution:

Moles of NaOH = Volume of NaOH (L) × Concentration of NaOH (mol/L)

             = 1.29 mL × (1 L / 1000 mL) × 0.600 mol/L

             = 0.000774 mol

Since acetic acid (CH3COOH) and sodium hydroxide (NaOH) react in a 1:1 molar ratio, the moles of acetic acid present in the vinegar can be determined as well:

Moles of CH3COOH = Moles of NaOH = 0.000774 mol

Finally, we need to calculate the concentration of acetic acid (vinegar) in the solution. Assuming the volume of vinegar is 1 L:

Concentration of CH3COOH = Moles of CH3COOH / Volume of CH3COOH

                      = 0.000774 mol / 1 L

                      = 0.000774 M

Therefore, the concentration of the vinegar (acetic acid) is approximately 0.000774 M.

Option B is the correct answer.

A disaccharide is a molecule which is made of two units of monosaccharide which is linked together by a glycosidic bond.

Example: Sucrose, lactose

Disaccharides, also called double sugar, is any substance that is composed of two molecules of simple sugars (monosaccharides) linked to each other. Disaccharides are crystalline water-soluble compounds.

Hence, option B is the correct answer.

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Braxtons dog eats 3 times more than Abbys

Answer:

Braxton's dog eats 3 times more food.

Explanation:

One mole or 12 g of carbon reacts with one of oxygen molecule weighs 32 g will produce one mole of carbon dioxide. One mole of carbon dioxide weighs 44 g.

Carbon dioxide is an inorganic gas formed by the covalent bonding between carbon and oxygen gas. Carbon dioxide is an essential gas to maintain the living atmosphere in earth.

The balanced chemical equation of the reaction between oxygen gas and carbon is given below:

\(\rm C+O_{2} \rightarrow CO_{2}\)

As per this equation, one mole of carbon reacts with one mole of oxygen gas:

Atomic mass of carbon = 12g

molecular mass of oxygen = 32 g

then molar mass of carbon dioxide = 32+ 12 = 44 h=g.

Therefore, 44 g of carbon dioxide is produced in this reaction.

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Considering the combined law, the volume of the sample is 81.639 L at 423 K and 1.00 atm.

Charles's law establishes the relationship between the temperature and the volume of a gas when the pressure is constant. This law says that the volume is directly proportional to the temperature of the gas: if the temperature increases, the volume of the gas increases while if the temperature of the gas decreases, the volume decreases.

Mathematically, Charles's law states:

\(\frac{V}{T}=k\)

Boyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant. That is, if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.

Mathematically, this law is expressed as:

P×V= k

Gay-Lussac's law establishes the relationship between the temperature and pressure of a gas when the volume is constant. This law says that the pressure of a gas is directly proportional to its temperature: if the temperature increases, the pressure will increase, while if the temperature decreases, the pressure will decrease.

Mathematically, Gay-Lussac's law states:

\(\frac{P}{T}=k\)

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

\(\frac{VxP}{T}=k\)

Considering an initial state 1 and a final state 2, it is fulfilled:

\(\frac{V1xP1}{T1}=\frac{V2xP2}{T2}\)

In this case, you know:

Replacing in combined law equation:

\(\frac{57.9 Lx1 atm}{300 K}=\frac{V2x1 atm}{423 K}\)

Solving:

\(V2= \frac{423 K}{1 atm} \frac{57.9 Lx1 atm}{300 K}\)

V2= 81.639 L

Finally, the volume of the sample is 81.639 L at 423 K and 1.00 atm.

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Answer: A light year is a measure of distance, for example, there is a big comet 5 light years away, it takes 5 years for light to get to the comet, and just like the galaxy, it would take 25,000 years for light to reach the center of the galaxy.

The relative atomic mass of the given element is 40.372 amu.

The relative atomic mass of an element is considered as the sum of the isotopes masses each multiplied by the percentage which is found in nature.

The formula which is used to calculate the relative atomic mass is

Relative atomic mass = sum of all atomic masses of isotopes × fractional abundance

Given,

Mass of isotopes 1 = 19.19 amu

Mass of isotopes 2 = 20.99 amu

Mass of isotopes 3 = 21.99 amu

Fractional abundance of isotope 1 = 0.9092

Fractional abundance of isotope 2 = 0.0025

Fractional abundance of isotope 3 = 0.0883

By substituting all the values, we get

[( 19.19 × 0.9092) + (20.99 × 0.0025) + (21.99 × 0.883)]

= 17.447 + 0.052 + 22.873

= 40.372 amu.

Thus, we concluded that the relative atomic mass of the given element is 40.372 amu.

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0.0625 mol of NO gas is formed at stp.

The balanced equation for the reaction is,

3Ag + 4HNO3 → 3AgNO3 + NO + 2H2O

Moles of nitric acid = 5 x 50 x 10 ^ -3 = 0.25 mol

From the shown balanced equation of reaction, 3 moles of silver react with 4 mole of HNO3

0.30 mol of Ag react with = 4/3 x 0.30 HNO3 = 0.4 mol HNO3

So, clearly HNO3 is limiting reagent. A reactant in a chemical reaction that determines the amount of product that is produced is the limiting reactant or limiting reagent.

now, 4 mol of HNO3 will give 1 mol of NO

0.25 mol of HNO3 will give = 1/4 x 0.25 mol NO

=  0.0625 moles of NO

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7.54 *\(10^8\) meters is  75.4 nanometers.

To convert 7.54 *  \(10^8\) meters to nanometers, you can multiply the value by \(10^9\)

as,  \(10^9\)nanometers = 1  meter.

7.54 * \(10^8\) m * \(10^9\) =  7.54 x \(10^1\) nm

Therefore, 7.54 *\(10^8\) meters is equal to 75.4 nanometers.

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To convert 7.54 x 10^-8 meters to nanometers, you multiply 7.54 x 10^-8 by 1 x 10^9 to get 75.4 nanometers.

To convert meters to nanometers, you need to know that 1 meter is equivalent to 1 x 109 nanometers. Therefore, if you were to convert 7.54 x 10-8 m to nanometers, you would multiply 7.54 x 10-8 by 1 x 109.

Here's how you'd do it: 7.54 x 10-8 m * 1 x 109 nm/m = 75.4 nm. So, 7.54 x 10-8 meters is equivalent to 75.4 nanometers.

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The value of Kc for the given reaction is 0.0579 (rounded to four decimal places).

The formula for the equilibrium constant, Kc, of a reaction is given by the ratio of the product of the concentrations of the products raised to their respective stoichiometric coefficients to the product of the concentrations of the reactants raised to their respective stoichiometric coefficients.

The stoichiometric coefficients are the coefficients in the balanced chemical equation.

To determine the value of Kc for the reaction given by the following chemical equation:N2(g) + 3 H2(g) ⇌ 2 NH3(g)

we first need to write the expression for Kc.

The expression for Kc is given by the following formula:Kc = [NH3]² / [N2][H2]³.

We are given the equilibrium concentrations as follows:[N2]eq = 2.66 M[H2]eq = 0.64 M[NH3]eq = 3.34 M

We can substitute these values into the expression for Kc and obtain the following:Kc = (3.34)² / (2.66)(0.64)³ = 0.0579 (rounded to four decimal places).

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Answer:

NH3 + HCl → NH4Cl: this equation is balanced as it has one nitrogen atom, four hydrogen atoms and one chlorine atom at each side of the equation.

Explanation:

Hello there!

In this case, according to the law of conservation of mass, we need to have the same number of atoms of each element at both sides of the equation; therefore we analyze each reaction:

NaOH + H2CO3 → Na2CO3 + H2O : three hydrogens at the left and two at the right, so this is not balanced.

N2 + H2 → 2NH3: two hydrogens at the left and six at the right, so this is not balanced.

NH3 + HCl → NH4Cl: this equation is balanced as it has one nitrogen atom, four hydrogen atoms and one chlorine atom at each side of the equation.

AlCl3 + Li → Al + LiCl​: three chlorines at the left and one of the right, so this is not balanced.

Best regards!  

Review and analyze the data recorded during the experiment to draw conclusions and better understand the types of  physical and  chemical changes that occurred.

Step 1: Organize your data in a table format in your lab notebook or the space provided.
Step 2: Record the initial material, Calcium carbonate.
Step 3: When Calcium carbonate reacts with hydrochloric acid, the changes observed would be the formation of bubbles and fizzing. This is a chemical change due to the formation of a new substance, calcium chloride, and the release of carbon dioxide gas.
Step 4: For water, there is no reaction observed. This step represents a physical change, as water does not alter the chemical composition of the other materials.
Step 5: When Copper sulfate pentahydrate is added to water, the change observed is the dissolution of the solid into the water, forming a blue solution. This is a physical change because the chemical composition of the copper sulfate remains the same.
Step 6: When Iron filings and sulfur are mixed together, no observable change occurs. This is a physical change since the individual substances are not chemically reacting.
Step 7: When Lead nitrate reacts with potassium iodide, a yellow precipitate (Lead iodide) forms. This is a chemical change due to the formation of new substances.
Step 8: When Magnesium reacts with hydrochloric acid, the change observed is the formation of bubbles and the disappearance of the magnesium. This is a chemical change due to the formation of magnesium chloride and the release of hydrogen gas.
Step 9: When a candle is burned, the change observed is the flame and the production of heat and light. This is a chemical change as new substances are formed, such as carbon dioxide and water vapor.
Remember to review and analyze the data recorded during the experiment to draw conclusions and better understand the types of changes (physical or chemical) that occurred.

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The stage that this most accurately describes while using the PCR is the initiation of DNA synthesis, also known as the denaturation stage.

In the denaturation stage of Polymerase Chain Reaction (PCR), the double-stranded DNA template is heated to a high temperature to separate the two complementary strands and create single-stranded DNA. The denaturation stage is the first step in the PCR cycle.

In this stage, the heat-stable DNA polymerase denatures the DNA and the primers anneal to the complementary single-stranded template. This marks the beginning of the extension stage, where the DNA polymerase synthesizes new complementary strands along the template DNA.

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Answer:

a lithium atom (Z=3, A=7 AMU) contains three protons (found from Z), three electrons (as the number of protons is equal to the number of electrons in an atom), and four neutrons (7 – 3 = 4).

Explanation:

Molarity = (moles of solute / volume of solution). Since the moles of solute (trypticase) stays the same, the molarity increases when the volume of solution decreases.

The volume of a word is an expression of the amount of content in a written piece. It can be measured in terms of the number of words, pages, or characters contained within a text. A text with a high volume will contain more content than a text with a low volume. Plagiarism-free writing is essential for a text to have a high volume, as plagiarized content does not contribute to the overall value of the piece.

The new molarity of trypticase in the cell growth medium would be 48 μM.

Molarity = (moles of solute / volume of solution)

Molarity (original) = (12 μM / 58 mL)

Molarity (new) = moles of solute (original) / volume of solution (new)

Molarity (new) = (12 μM * 58 mL) / 16 mL

Molarity (new) = 48 μM

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Answer:

To resolve this, we need to place the coefficient “2” in front of the sodium in the reactant, to give the equation shown below. 2 Na (s) + Cl 2 (g) → 2 NaCl (s) In this equation, there are two sodiums in the reactants, two sodiums in the products, two chlorines in the reactants and two chlorines in the products; the equation is now balanced.

Explanation:

Simple atomic models called Bohr-Rutherford diagrams display how many electrons are present in each of an atom's outermost shells.

The Bohr theory only applies to organisms with a single electron. Three electrons make up the lithium atom. Hence, the lithium atom does not fit into Bohr's hypothesis.

Lithium is an air-reactive alkali metal that tarnishes quickly to a dull silvery-grey and finally black. It is a silvery-white to grey alkali metal with a metal-lic lustre when new. At 20 °C, it is the least dense and lightest metal of all the elements that are not gases, and it floats on water.

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This is a perfect answer

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Answer:

There are 92 naturally occurring elements.

Explanation:

Answer:

synthesis

Explanation:

The reaction given is a synthesis reaction or combination reaction.

Given equation:

                        NH₃  +  HCl   →   NH₄Cl

In a synthesis reaction, a single product is formed from two or more reactants

                          A + B →  C

The formation of compounds from the union of constituent elements also falls into this category.

So the given reaction is a synthesis reaction.

In a decomposition reaction two or more products are formed from a single reactant

In a single replacement reaction, one substance replaces another.

In double replacement reactions partners in a chemical specie are exchanged.

Therefore the given reaction is a synthesis reaction

Answer:

NASA stands for National Aeronautics and Space Administration

Answer:

National Aeronautics and Space Administration

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