The model represents a polynomial and its factors.
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Which equation is represented by the model?
Ox²-2x-3=(x − 3)(x + 1)
Ox²-4x+3=(x-3)(x-1)
Ox²+2x+3= (x+3)(x-1)
Ox²+4x-3= (x+3)(x + 1)
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Answer:

\(Li_2O\)

Explanation:

Hello!

In this case, when looking over the chemical formula of a compound formed when two elements interact, we need to realize about their location in the periodic table; thus, since lithium is a metal and oxygen a nonmetal, we infer lithium turns out the cation and oxygen the anion. Moreover, as the oxidation state of lithium is 1+ and that of oxygen is 2-, we can set up the chemical formula as follows:

\(Li^+O^{2-}\\\\Li_2O\)

Best regards!

Answer:f has 14 electrons in 7 sublevel orbitals,d has 10 electrons in 5 sublevel orbitals,p has 6 electrons in 3 sublevel orbitals,s has 2 electrons in 1 sublevel orbital.

Explanation:

Answer:

14 i think

Explanation:

i googled it

The grams of magnesium hydroxide needed to yield 8.00 moles of magnesium chlorate is approximately 466.64 g. None of the options provided match the calculated value of 466.64 g.

To determine the grams of magnesium hydroxide (Mg(OH)2) needed to yield 8.00 moles of magnesium chlorate (Mg(ClO3)2), we need to consider the balanced chemical equation for the reaction between magnesium hydroxide and chlorine.

The balanced equation is as follows:

2 Mg(OH)2 + 6 Cl2 → 2 Mg(ClO3)2 + 2 H2O

From the balanced equation, we can see that 2 moles of Mg(OH)2 react with 6 moles of Cl2 to produce 2 moles of Mg(ClO3)2.

Therefore, the stoichiometric ratio is 2 moles of Mg(OH)2 : 2 moles of Mg(ClO3)2.

To calculate the grams of Mg(OH)2 needed, we can use the stoichiometric ratio and the given moles of Mg(ClO3)2.

Given:

Moles of Mg(ClO3)2 = 8.00 moles

Using the stoichiometric ratio, we have:

8.00 moles Mg(ClO3)2 × (2 moles Mg(OH)2 / 2 moles Mg(ClO3)2) = 8.00 moles Mg(OH)2

To convert moles to grams, we need to multiply by the molar mass of Mg(OH)2.

The molar mass of Mg(OH)2 = (24.31 g/mol) + (2 * 16.00 g/mol) = 58.33 g/mol

Grams of Mg(OH)2 = 8.00 moles Mg(OH)2 × 58.33 g/mol = 466.64 g

Therefore, the grams of magnesium hydroxide needed to yield 8.00 moles of magnesium chlorate is approximately 466.64 g.

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Answer: Industrial processes including mining and manufacturing historically have been leading causes of soil pollution. Industrial areas typically have much higher levels of trace elements and organic contaminants. This is due to intentional and unintentional releases from industrial processes directly into the environment, including to the soil, adjacent water bodies, and the atmosphere.

Explanation:

The partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg (calculated by subtracting the partial pressure of water, 17.0 mm Hg, from the total atmospheric pressure, 750.0 mm Hg).

When a gas is collected over water, the presence of water vapor affects the total pressure observed. In this case, the total atmospheric pressure is given as 750.0 mm Hg, and the partial pressure of water vapor at 19.5°C is 17.0 mm Hg.

To determine the partial pressure of hydrogen, we need to subtract the partial pressure of water vapor from the total atmospheric pressure. Partial pressure refers to the pressure exerted by an individual gas component in a mixture. In this scenario, the collected gas is primarily hydrogen, with water vapor being the other component.

By subtracting the partial pressure of water vapor (17.0 mm Hg) from the total atmospheric pressure (750.0 mm Hg), we can find the partial pressure of hydrogen:

Partial pressure of hydrogen = Total atmospheric pressure - Partial pressure of water vapor

Partial pressure of hydrogen = 750.0 mm Hg - 17.0 mm Hg

Partial pressure of hydrogen = 733.0 mm Hg

Therefore, the partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg.

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If Q = Kp, the reaction is at equilibrium. If Q < Kp, the reaction will proceed to the right (toward products). If Q > Kp, the reaction will proceed to the left (toward reactants).

To determine whether the reaction mixture is at equilibrium at 450 K, we need to calculate the reaction quotient (Q) and compare it to the equilibrium constant (Kp). The reaction for the given system is:
\(PCl_5 (g) = PCl_3 (g) + Cl_2 (g)\)
1. Write the expression for the reaction quotient (Q):
\(Q = (P_{PCl_3} * P_{Cl_2}) / P_{PCl_5}\)
where \(P_{PCl_3}\), \(P_{Cl_2}\), and \(P_{PCl_5}\) are the partial pressures of \(PCl_3\), \(Cl_2\), and \(PCl_5\), respectively.
2. Plug in the given values:
Q = (0.21 atm * 0.41 atm) / (0.59 atm)
3. Calculate Q:
Q ≈ 0.146
4. Compare Q to Kp:
To determine whether the reaction mixture is at equilibrium, compare Q to the equilibrium constant (Kp) for the reaction at 450 K. If Q = Kp, the reaction is at equilibrium. If Q < Kp, the reaction will proceed to the right (toward products). If Q > Kp, the reaction will proceed to the left (toward reactants).
Unfortunately, we do not have the value of Kp for the reaction at 450 K.

Therefore, we cannot definitively determine whether the reaction mixture is at equilibrium.

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The evidence of chemical reactions can be given as:

Blue colour solution=iron and copper(II) sulfate  

no reaction=copper and hydrochloric acid

Brown colour solution=zinc and iron(III) nitrate

Brown colour solution=zinc and magnesium sulfate

hydrogen gas liberate= zinc and hydrochloric acid

hydrogen gas liberate=iron and hydrochloric acid

Chemical reaction is the process by which a number of chemicals (the reactants) change into a number of unique compounds (the products). Materials are composed of chemical components or chemical elements. The atoms which make comprised the reactants of a chemical reaction are rearranged to create different products.

Blue colour solution=iron and copper(II) sulfate  

no reaction=copper and hydrochloric acid

Brown colour solution=zinc and iron(III) nitrate

Brown colour solution=zinc and magnesium sulfate

hydrogen gas liberate= zinc and hydrochloric acid

hydrogen gas liberate=iron and hydrochloric acid

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Answer:

\([OH^-]=3.33x10^{-7}M\)

Explanation:

Hello,

In this case, for the given concentration of hydronium, we can compute the pH as shown below:

\(pH=-log([H^+])=-log(3.0x10^{-8})=7.52\)

Now, given the relationship between pH and pOH we can compute the pOH which is directly related with the concentration of hydroxyl in the solution:

\(pOH=14-pH=14-7.52=6.48\)

Then, the concentration of hydroxyl turns out:

\([OH^-]=10^{-pOH}=10^{-6.48}\)

\([OH^-]=3.33x10^{-7}M\)

Best regards.

The mass percentage of the solution that we have in the question is  5 g.

Percent w/w (weight/weight) concentration is a way to express the concentration of a solute in a solution as a percentage by mass. It represents the mass of the solute in grams per 100 grams of the solution.

Percent w/w concentration is commonly used in industries such as pharmaceuticals, food and beverage, and cosmetics to measure the concentration of active ingredients or additives in their products.

We know that;

%w/w = weight of the solute/Weight of the solution

Let the weight of the solute be x

1 = x/500 * 100/1

1 = 100x/500

500 = 100x

x = 5 g

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Answer:

1. Because a Francium atom is deeper down the alkali metals, it is much easier to lose a valence electron.

2. A fluorine atom can easily gain a valence electron, but it could not easily lose a valence electron because it is one electron away from filling the outer shell

Explanation:

The answer is the explanation

Answer:

Explanation:

Determine the treatments you’ll be using on your eggs, and prepare the substances you’ll need. You can make salt-water solutions by dissolving different amounts of table salt in containers of water (e.g. 100g, 200g, 300g of salt (NaCl) per liter). You can make solutions of food coloring by adding a few drops of each color into containers of  

The Eggsperiment with Vinegar solution. The first experiment conducted was the egg placed in vinegar solution which allowed the egg to become soft and bouncy . Vinegar is a weak acid which is 5% acetic acid in water (meaning vinegar is largely just water). The egg has a shell that is made up of calcium carbonate   an air cell forms at the large end of the egg. While the embryo is growing, the shell membranes surround and contain the white or albumen of the egg. The albumen provides the liquid medium in which the embryo develops, and it also contains a large amount of the protein necessary for proper development. I hope this was hopeful

In the image we can see that there are 1 phosphorus (P4) molecules and 7 fluorine molecules.

According to the stoichiometry of the reaction, one molecule of phosphorus (P4) and 6 molecules of fluorine (F2) are needed to form 4 molecules of PF3.

The answer is:

The limiting reagent is phosphorus (P4)

The number pf PF3 molecules formed is 4 and

The number of fluorine atoms/molecules in excess is 1.

Answer:

The granite block transferred 4080 joules of energy, and the mass of the water is 35.84 grams.

Explanation:

The equation needed to answer both parts of the question is:

Q = mcΔT

In this equation,

-----> Q = energy/heat (J)

-----> m = mass (g)

-----> c = specific heat (J/g°C)

-----> ΔT = change in temperature (°C)

Part #1:

First, you need to find the energy transferred from granite block using the previous equation. You have been given the mass, specific heat, and change in temperature.

Q = ? J                            c = 0.795 J/g°C

m = 126.1 g                     ΔT = 92.6 °C - 51.9 °C = 40.7 °C

Q = mcΔT

Q = (126.1 g)(0.795 J/g°C)(40.7 )

Q = 4080

Part #2:

Secondly, using the energy calculated in Part #1, you need to calculate the mass of the water. You have calculated the energy transferred, and have been given the specific heat and change in temperature.

Q = 4080 J                     c = 4.186 J/g°C

m = ? g                            ΔT = 51.9 °C - 24.7 °C = 27.2 °C

Q = mcΔT

4080 J = m(4.186 J/g°C)(27.2 °C)

4080 J = m(113.8592)

35.84 = m

Answer: blank 1: 4,080 joules

Blank 2: 35.8 grams

Explanation:

Answer:

1st step : mix the mixture with water that way A will dissolve while B will remain insoluble.

2nd step :To get B from the solution, filter the mixture and get B

3rd step : To get A from the solution evaporate the new solution

Explanation:

Assuming 2mg of impurity B to be present

100 mg of A is present as well

Method of purifying A given that B is of same solubility

Dissolve the 100 mg of A with 30 mL

1st step : mix the mixture with water that way A will dissolve while B will remain insoluble.

2nd step :To get B from the solution, filter the mixture and get B

3rd step : To get A from the solution evaporate the new solution

The sections between the lines on a phase diagram represent Option B. The regions in which temperature and pressure change a substance's phase .

A phase diagram is a graphical representation that shows the conditions at which a substance exists as a solid, liquid, or gas.

It is a graph that represents the relationship between pressure and temperature under which a substance exists as a solid, liquid, or gas.

The sections between the lines on a phase diagram represent the regions in which temperature and pressure change a substance's phase.

Answer: B. The regions in which temperature and pressure change a substance's phase.

Explanation:A phase diagram is a graphical representation of the state of matter that exists under certain conditions of pressure and temperature.

A phase diagram is also known as a phase equilibrium diagram, a phase transition diagram, or a P-T diagram (pressure-temperature).

A phase diagram has three regions, solid, liquid, and gas, which are separated by phase boundaries.

Each boundary represents the conditions of temperature and pressure under which a phase change occurs.

The triple point is the point where all three phases coexist.

The critical point is the point at which the gas and liquid phases become indistinguishable.

The sections between the lines on a phase diagram represent the regions in which temperature and pressure change a substance's phase.

These sections are also called phase boundaries or phase transitions.

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Answer:

Kinetic energy might transferred from one particle to another during an elastic collision, but  i don't think that there is going to be any change in the total energy of the colliding particles. Because there are no forces of attraction or repulsion between gas particles .

Explanation:

Heavy rainfall causes a landslide. Hence, option A is correct.

A landslide is defined as the movement of a mass of rock, debris, or earth down a slope.

Water can trigger landslides and mudslides because it alters the pressure within the slope, which leads to slope instability.

Consequently, the heavy water-laden slope materials (soil, rock, etc.) will succumb to the forces of gravity.

Hence, option A is correct.

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Answer:

aerosols

Explanation:

If more energy is absorbed than what is released during bond breaking and forming, the reaction is endothermic.

When bonds in the reactants are broken in endothermic reactions, greater energy is absorbed than emitted when new bonds are created in the products.

The energy required to break existing bonds in endothermic processes is more than the energy released when new bonds are generated. In an exothermic process, more energy is generated when new bonds are created than is consumed when old ones are broken.

If more energy is absorbed than what is released during bond breaking and forming, the reaction is endothermic.

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Answer:

Therefore Mass of 6.022 x10^23 molecules= 32 g.

Explanation:

Answer:

\(w_{Cl}=0.5028\)

Explanation:

Hello.

In this case, a partial chemical reaction can be written as:

\(NH_3+SgCl_6\rightarrow HCl+solid\)

Thus, the mass of chlorine in the initial seaborgium hexachloride (molar mass: 475.718 g/mol) is:

\(m_{Cl}=5.137gSgCl_6*\frac{6*35.45gCl}{475.718 gSgCl_6} =2.297gCl\)

Which is also the total chlorine. Moreover, the chlorine from the HCl is:

\(m_{Cl\ in \ HCl}=1.174gHCl*0.9723=1.142g\)

It means that the chlorine in the solid is:

\(m_{Cl\ in\ solid}=2.297gCl-1.142gCl=1.155gCl\)

Therefore, the required fraction (w) is computed by dividing the mass of chlorine in the solid by the mass of chlorine in the initial seaborgium hexachloride as the only source of chlorine at the beginning:

\(w_{Cl}=\frac{1.155g}{2.297g}\\ \\w_{Cl}=0.5028\)

Best regards.

Answer:

Choice A. Ammonium chloride.

Explanation:

Consider the bonds in each of the four compounds.

Ammonium chloride \(\rm NH_4Cl\) is an ionic compound. Each

The \(\rm {NH_4}^{+}\) and \(\rm Cl^{-}\) ions in \(\rm NH_4Cl\) are connected with ionic bonds.

What make \(\rm NH_4Cl\) special is that its cation \(\rm {NH_4}^{+}\) is polyatomic. In other words, each \(\rm {NH_4}^{+}\) ion contains more than one atoms. These atoms (one \(\rm N\) atom and four \(\rm H\) atoms) are connected with covalent bonds. Therefore, \(\rm NH_4Cl\) has both ionic and covalent bonds.

Carbon dioxide \(\rm CO_2\) is a covalent compound. Each \(\rm CO_2\) molecule contains two \(\rm C=O\) double bonds in total. \(\rm CO_2\) molecules have no ionic bond.

The name "ethyl ethanoate" might sound like the name of a salt (think about sodium ethanoate.) However, in reality, ethyl ethanoate \(\rm CH_3COOCH_2CH3\) is an ester. The "ethyl" here refers to the \(\rm -OCH_2CH3\) part, originating from ethanol. On the other hand, "ethanoate" refers to the \(\rm CH_3C(O)-\) part, which can be obtained from ethanoic acid.

These two parts are connected with a covalent \(\rm C-O\) single bond. (The \(\rm C\) in ethanoic acid is connected to the \(\rm O\) in ethanol.) As a result, there's no ionic bond in ethyl ethanoate, either.

Sodium chloride \(\rm NaCl\) is an ionic compound. Both the \(\rm Na^{+}\) ion and the \(\rm Cl^{-}\) are monoatomic. While the \(\rm Na^{+}\) and \(\rm Cl^{-}\) in sodium chloride are connected with ionic bonds, neither \(\rm Na^{+}\) nor \(\rm Cl^{-}\) contains covalent bond.

Answer:

it would fall-

Answer: 13.5 minutes to run 3.2 km.

Explanation: To solve this problem, you need to convert the distance from kilometers to miles and the speed from miles per hour to kilometers per hour. 3.2 km is approximately 1.988 miles and 5.5 mph is approximately 8.851 kph. To find the time it takes to run 1.988 miles at 8.851 kph, you can use the formula time = distance ÷ speed. Plugging in the values, you get time = 1.988 miles ÷ 8.851 kph, which simplifies to approximately 0.225 hours or 13.5 minutes.

Therefore, it will take the student approximately 13.5 minutes to run 3.2 km.

The process by which the molecules of the gas can be able to move is the process of diffusion.

We know that according to the Graham's law, the rate of the diffusion  of the gas is inversely proportional to the molar mass of the gas. When we open the bottles, the molecules of the perfume would begin to move.

As the bottle is opened, the molecules would escape from the bottle and then be able to travel through the room and get to where you are by the principle of diffusion.

Hence, the movement of the perfume is according to the Graham's law of diffusion in gases.

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Answer:

5.6L

Explanation:

16.0g. =?

(16.0×22.4)÷64.07

=5.5939

approximately 5.6L

Answer:

The chemical symbols for three different atomic cations that all have 5 protons are; \(B^+, B^2+, B^3+\).

A cation simply means a positive ion. Cations are formed when a neutral atoms loose one or more electron(s).

In the periodic table, there exists a single element that has five protons and that element is boron (B).

Boron can form three cations and this depends  on the number of electrons lost from the neutral boron atom in each case. These cations are; \(B^+, B^2+, B^3+\).

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Answer:

Mass and force

Explanation:

Using Newton's Second law we get the equation F=MA.

250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.

w/v = [ mass of solute (g) / volume of solution (mL) ] × 100

5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100

volume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100

volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100

volume of solution (mL) = [ 125 g / 0.05 ] x 100

Answer:

2.409 x 10²⁴

Explanation:

There are two nitrogens for every mole of NH₄NO₃

Since there are two moles, that means there are 4 nitrogens

There are 6.022 x 10²³ atoms in every mole of any element

(6.022 x 10²³) x 4 = 2.4088 x 10²⁴

Use sig figs to round it to 2.409 x 10²⁴