An element has 15 protons, 11 neutrons, and 17 electrons. What is the name of the
element?

When silver nitrate and sodium chloride are combined with water, silver chloride will solidify and precipitate out of solution. In this instance, silver chloride is the precipitate.

Precipitation includes the following: rain, hail, sleet, and snow. Rain forms when water vapour in clouds condenses on dust particles, which eventually grow too big to stay in the cloud and fall to the ground, where they collect more water and enlarge further.

The chemical reaction between potassium chloride and silver nitrate, in which solid silver chloride precipitated out, is among the greatest examples of precipitation reactions. This precipitation reaction resulted in the formation of an insoluble salt.

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Answer:

7.21 x 103 kg/m3

Explanation:

Dimensional analysis has been the process to establish and convert the various units in the measurement. The density of manganese in kg/m3 is 7.21 × 10³ kg/m³.

Dimensional analysis has been the method that is also referred to as the unit factor or factor label method. It solves the mathematical expressions by multiplying the given value with another without changing its quantity and amount. It is used to change the units of the value.

Given,

Density of manganese = 7.21 g/cm³

The dimensional analysis method is used to convert grams per cubic centimeter into kilograms per cubic meter as:

1 gram / cubic centimeter = 1000 kilogram / cubic meter

So, 7.21 g/cm³ = X kilogram / cubic centimeter

Solving for X as:

X = 7.21 g/cm³ × 1000 kilogram / cubic centimeter

X = 7.21 × 10³ kg/m³

Therefore, 7.21 × 10³ kg/m³ is the density.

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2.02 g mass of oxygen are produced during the decomposition of 4.04 g of potassium nitrate.

According to the law of conservation of mass, the total mass of the reactants in a chemical reaction is equal to the total mass of the products. Therefore, we can use this law to determine the mass of oxygen produced in the decomposition of potassium nitrate.

Let's assume that x grams of oxygen (O2) are produced during the decomposition of 4.04 g of potassium nitrate (KNO3). The balanced chemical equation for the decomposition of KNO3 is:

2 KNO3 --> 2 KNO2 + O2

From the equation, we can see that 2 moles of KNO3 produce 1 mole of O2. We can use this information to set up a proportion to solve for x:

2 mol KNO3 / 1 mol O2 = 4.04 g KNO3 / x g O2

Solving for x, we get:

x = (1 mol O2 / 2 mol KNO3) x (4.04 g KNO3) = 2.02 g O2

Therefore, 2.02 g of oxygen are produced during the decomposition of 4.04 g of potassium nitrate using law of conservation of mass.

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Answer:

Its Concentration, diffusion, a selectively Premable membrane, osmosis, diffusion, a selectively permeable membrane, osmosis, and diffusion

Explanation:

To solve this we must be knowing each and every concept related to osmosis. Therefore, in below given ways blanks can be filled.

Osmosis is indeed a passive process that occurs without the need of any energy. It entails moving molecules from an area of greater concentration to an area of lower concentration till the concentrations on both sides of the membrane are equal.

1)Concentration  refers to the amount of a substance in a given space.

2) diffusion is the movement of particles from an area of higher concentration

3) A selectively permeable membrane allows some materials to pass through it but keeps other

4) osmosis is the diffusion of water molecules through a selectively

5) diffusion moves wastes from inside a cell to outside a cell.

6) A selectively permeable membrane can be compared to a window screen.

7) osmosis happens when water particles move from a place where their concentration is higher to a place where their concentration is lower.

8) diffusion is the process by which oxygen is moved into and carbon dioxide is moved into a cell.

Therefore, in above given ways blanks can be filled.

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The molar concentration of lithium ions in the Li3PO4 solution is 1.65 M.

To determine the molar concentration of lithium ions in a Li3PO4 solution, we need to consider the ratio of lithium ions to Li3PO4 in the compound.

In Li3PO4, there are three lithium ions (Li+) for every one formula unit of Li3PO4. Therefore, the molar concentration of lithium ions will be three times the molar concentration of Li3PO4.

Given that the molar concentration of Li3PO4 is 0.550 M, the molar concentration of lithium ions will be:

0.550 M × 3 = 1.65 M

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Metal carbonyls are characterized as volatile, low-melting-point compounds. They are created from the compound Mx(Co)y, which upon heating breaks down into metal and carbon monoxide. Contact with the skin can make them toxic.

In some cases, such as in nickel tetracarbonyl (Ni(CO)4), these complexes are homoleptic and only contain CO ligands, but more frequently, metal carbonyls are heteroleptic and contain a variety of ligands. Mononuclear metal carbonyls have a single metal atom at their core.

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The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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Answer:

C) ZnCl2(s) + H2(g)

Explanation:

On reaction between Zn and HCl, Zn is more reactive than Hydrogen thus displacing it from HCl making a bond with two atoms of chlorine and releases hydrogen gas.

The equation of reaction

Zn(s) + HCl(aq) => ZnCl2(s) + H2(g).

Therefore, the required products are ZnCl2(aq) and H2(g).

Two px atomic orbitals were used to form a sigma bonding MO (figureII, lower energy) and a sigma antibonding MO (figure I, higher energy). The bonding MO does not have a node separating the two halves of the orbital.

An atomic orbital is a function in atomic theory and quantum mechanics that describes the location and wave-like behavior of an electron in an atom. This formula can be used to calculate the likelihood of locating any atom's electron in any given location surrounding the nucleus. The phrase atomic orbital can also refer to the actual region or place where the electron is projected to be present given the orbital's mathematical form.

Each orbital in an atom is defined by a set of values of the three quantum numbers n, l, and ml, which correspond to the energy, angular momentum, and an angular momentum vector component of the electron, respectively (magnetic quantum number).

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We do not have enough information to deduce the isotope that would have nine neutrons. Option 5

The atom is composed of subatomic particles. The subatomic particles that are in the atom are such that we have the electrons that are negatively charged, the protons that are positively charged and the neutrons that are uncharged.

Now, we know that the number of neutrons is obtained as the difference between the mass number and the atomic number of the atom. In this case, we only have the mass numbers and not the atomic numbers thus we do not have sufficient information.

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Answer:

To determine the grams of silver phosphate produced and excess reagent, we need to use stoichiometry and identify the limiting reagent.

First, we need to find the number of moles of each reactant using their molar masses:

Number of moles of AgNO3 = 200 g / 169.87 g/mol = 1.177 mol

Number of moles of Na3PO4 = 200 g / 380.13 g/mol = 0.526 mol

Next, we need to use the balanced chemical equation to determine the theoretical yield of silver phosphate:

From the balanced equation, 3 moles of AgNO3 react with 1 mole of Na3PO4 to produce 1 mole of Ag3PO4. Therefore, the number of moles of Ag3PO4 produced is:

1.177 mol AgNO3 × (1 mol Ag3PO4 / 3 mol AgNO3) = 0.392 mol Ag3PO4

To convert moles of Ag3PO4 to grams, we use its molar mass:

0.392 mol Ag3PO4 × 418.58 g/mol = 164.0 g Ag3PO4

Therefore, 164.0 grams of Ag3PO4 are produced.

To determine the excess reagent, we need to identify the limiting reagent. The reactant that produces less product is the limiting reagent.

From the stoichiometry calculation above, we can see that 1.177 moles of AgNO3 are required to react with 0.526 moles of Na3PO4, so Na3PO4 is the limiting reagent. Therefore, we need to determine how much of the excess AgNO3 remains after the reaction is complete.

The amount of AgNO3 that reacted is:

0.526 mol Na3PO4 × (3 mol AgNO3 / 1 mol Na3PO4) × (169.87 g/mol AgNO3) = 85.3 g AgNO3

The amount of excess AgNO3 is:

200 g AgNO3 - 85.3 g AgNO3 = 114.7 g AgNO3

Therefore, 114.7 grams of AgNO3 is left over as excess reagent.

Answer:

this is the process that lowers or tears down the surface features of the earth.

gravity moves broken pieces of rock,large or small down slope.

glaciers move all sizes of sediments from extremely large Boulder to the tiniest fragments.

wind moves sand sized and smaller pieces through the air.

water moves all sizes of sediments.

The detection limit for this instrument is approximately 0.301 ng Al/L, and the quantitation limit is approximately 3.01 ng Al/L.

The detection limit and quantitation limit of the spectrometer can be calculated using the measurements of the standard solution.

To calculate the detection limit, we need to determine the mean and standard deviation of the measurements.

Mean = (0.71 + 0.90 + 1.40 + 1.13 + 0.89 + 1.27 + 0.99) / 7 = 1.04 ng Al/L

Standard deviation = √[(0.71 - 1.04)^2 + (0.90 - 1.04)^2 + (1.40 - 1.04)^2 + (1.13 - 1.04)^2 + (0.89 - 1.04)^2 + (1.27 - 1.04)^2 + (0.99 - 1.04)^2] / √(7-1)
= √[0.1153 + 0.0103 + 0.1313 + 0.0009 + 0.0243 + 0.0193 + 0.0024] / √6
= √0.3035 / √6
= 0.2465 / √6
≈ 0.1003 ng Al/L

The detection limit is determined as 3 times the standard deviation of the measurements. Therefore, the detection limit is 3 x 0.1003 ≈ 0.301 ng Al/L.

To calculate the quantitation limit, we multiply the detection limit by 10. Therefore, the quantitation limit is 10 x 0.301 = 3.01 ng Al/L.

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Answer:

N2O is an empirical formula

Explanation:

A.) P4O10   NO:  Can be reduced to P2O5

B.) C2H4    NO:  Can be reduced to CH2

C.) H2O2     NO:  Can be reduced to H O

D.) N2O     YES, the formula cannot be reduced any further.

Answer:

the mass of a tree is primary carbon

Explanation:

the the carbon comes from carbon dioxide during photosynthesis

Answer:

Plants get all the carbon, hydrogen, and oxygen they need from carbon dioxide and water, which they use to build carbohydrates during photosynthesis. To build other kinds of molecules they also need elements like nitrogen, phosphorous, and sulfur. Plants get these as well as other elements from the soil.

Explanation:

Answer:

The atomic number is written on top of the element symbol.

Explanation:

From top to bottom:

-Atomic Number

-Element Symbol

-Name

-Atomic Mass

~

Answer:

2Fe₂O₃

Explanation:

If the number of atoms of each element are the same on reactant and product sides, it is a balanced equation. This is not a balanced equation because the number of atoms of each element are not the same on reactant and product sides.

To balance an equation, let's first list the atoms:

Then, we count the number of atoms on both sides:

We multiply the number of atoms for each element on either side by the number of molecules (aka coefficient, or "big number"):

To balance the equation, we need the total number for Fe on the right side to be 4, and the total number for O on the right side to be 6. We can do that by adding a "big number", or coefficient in front, which when multiplied by the number of atoms for each element, makes a balanced equation.

2 is a good value: 2 × 2 = 4, and 2 × 3 = 6.

As such:

4Fe + 3O₂ → 2Fe₂O₃

Answer:

The third option is correct

The compound that is a non-electrolyte when dissolved in water is CCl4.

When CCl4 dissolves in water, it does not break down into ions, and it does not conduct electricity.What is an electrolyte?An electrolyte is a compound that dissolves in water, and its solution conducts electricity due to the presence of ions. A compound must dissociate in water to produce ions to be considered an electrolyte. The ions can move freely through the solution, allowing for the conduction of electricity.There are three types of electrolytes: strong electrolytes, weak electrolytes, and nonelectrolytes. Strong electrolytes dissociate fully into ions in water and conduct electricity very efficiently. Weak electrolytes only partially dissociate, and they conduct electricity less efficiently than strong electrolytes.Nonelectrolytes are substances that do not dissolve in water or dissolve but do not dissociate into ions. Because they do not have ions, they do not conduct electricity. CCl4 is a nonelectrolyte, as it does not produce any ions when it dissolves in water.

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Answer:

-27.2 kJ

Explanation:

We can use the heat-transfer formula. Recall that:

\(\displaystyle q = mC\Delta T\)

Where m is the mass, C is the substance's specific heat, and ΔT is the change in temperature.

Hence substitute:

\(\displaystyle \begin{aligned} q & = (100.0\text{ g})\left(\frac{4.18\text{ J}}{\text{g-$^\circ$C}}\right)(20.0\text{ $^\circ$C} - 85.0\text{ $^\circ$C}) \\ \\ & =(100.0\text{ g})\left(\frac{4.18\text{ J}}{\text{g-$^\circ$C}}\right)(-65.0\text{ $^\circ$C}) \\ \\ & = -2.72\times 10^4\text{ J} = -27.2\text{ kJ}\end{aligned}\)

Therefore, the cooling of the water released about 27.2 kJ of heat.

B. intermolecular attractions.

Answer:

Digital scales /weight scales (the stuff you weigh yourself to see how much lbs you are)

Explanation:

The approximate pH of a 0.2 M solution of boric acid as an eye wash is around 5.14.


To understand how the pH is calculated for a solution of boric acid, it's helpful to have a basic understanding of acid-base chemistry. When an acid is dissolved in water, it donates a hydrogen ion (H+) to the water molecules, forming hydronium ions (H3O+). The more hydrogen ions present in the solution, the lower the pH (since pH is a measure of the concentration of hydrogen ions).

Boric acid (H3BO3) is a weak acid, which means it only partially dissociates in water. It donates a hydrogen ion to form the conjugate base (H2BO3^-), but some of the molecules remain undissociated. The acid dissociation constant (Ka) is a measure of how much of the acid dissociates, and is calculated by dividing the concentration of the conjugate base by the concentration of the acid.

For boric acid, Ka is 5.8 x 10^-10. This is a very small number, which means the acid is not very strong. To calculate the pH of a 0.2 M solution of boric acid, we use the formula:

pH = (1/2) x (-log(Ka) + log([HA]))

where [HA] is the concentration of the acid (0.2 M). The factor of 1/2 is because boric acid donates two protons (H+) when it dissociates, but the dissociation is incomplete, so we only count half of the protons.

Plugging in the values, we get:

pH = (1/2) x (-log(5.8 x 10^-10) + log(0.2)) = 5.14

So the pH of a 0.2 M solution of boric acid as an eye wash is approximately 5.14. This is slightly acidic, but still within the safe range for eye wash solutions.

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Answer:

2, strong acid

Explanation:

Data obtained from the question. This includes:

[H+] = 0.01 M

pH =?

pH of a solution can be obtained by using the following formula:

pH = –Log [H+]

pH = –Log 0.01

pH = 2

The pH of a solution ranging between 0 and 6 is declared to be an acid solution. The smaller the pH value, the stronger the acid.

Since the pH of the above solution is 2, it means the solution is a strong acid.

The mass percentage of methane in the gaseous mixture of methane, ethane, and propane is approximately 43.5%.

The mass percentage of a gas in a mixture can be calculated by dividing the mass of the gas by the total mass of the mixture and then multiplying by 100%.

To calculate the mass of each gas, the ideal gas law, PV = nRT, can be used. Here, P is the partial pressure of the gas, V is the volume of the mixture, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature.

Assuming a constant temperature and volume, the number of moles of each gas can be determined from the partial pressures of the gases:

n_methane = (95 kPa * V) / (R * T)

n_ethane = (105 kPa * V) / (R * T)

n_propane = (50 kPa * V) / (R * T)

The mass of each gas can be calculated using the molar mass of the gas:

m_methane = n_methane * M_methane

m_ethane = n_ethane * M_ethane

m_propane = n_propane * M_propane

Where M is the molar mass of the gas. The molar mass of methane is 16.04 g/mol, the molar mass of ethane is 30.07 g/mol, and the molar mass of propane is 44.10 g/mol.

The total mass of the mixture can be calculated as the sum of the masses of each gas:

total mass = m_methane + m_ethane + m_propane

Finally, the mass percentage of methane in the mixture can be calculated as:

mass percentage of methane = (m_methane / total mass) * 100%

Approximating the values, the mass percentage of methane in the gaseous mixture of methane, ethane, and propane is approximately 43.5%.

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Explanation:

Density = mass / volume

ρ = 640 g / (4 cm)³

ρ = 10 g/cm³

It would be helpful if you provided the reaction that you are referring to in your question. Without knowing the specific reaction, it is difficult to accurately answer whether the reaction favors the reactants or products. However, I will provide a general explanation of how to determine if a reaction favors the reactants or products.

In a chemical reaction, the reactants are the substances that are present before the reaction occurs, and the products are the substances that are formed as a result of the reaction. The direction that a reaction proceeds in is determined by the relative amounts of reactants and products, as well as the energy of the system. If a reaction releases energy (exothermic), it will generally favor the products. If a reaction requires energy (endothermic), it will generally favor the reactants.

Another factor that can influence the direction of a reaction is the equilibrium constant, K. The equilibrium constant is a measure of the relative amounts of reactants and products at equilibrium. If K is greater than 1, the reaction favors the products. If K is less than 1, the reaction favors the reactants.

Overall, whether a reaction favors the reactants or products depends on a variety of factors, including the relative amounts of reactants and products, the energy of the system, and the equilibrium constant.

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Answer: a. cause nuclear decay

Explanation:

This is because there would be a dilution of the solution if more of the water is added by increasing the pool.

The concentration of HOCl drops when the pH of the pool water rises (becomes more alkaline). This is due to the fact that HOCl reacts with the water's hydroxide ions (OH-), turning it into the less potent hypochlorite ion (OCl-), as the water gets more alkaline. Compared to HOCl, the hypochlorite ion is less effective as a disinfectant. As a result, the concentration of the more potent HOCl declines as the pH rises, decreasing the pool water's ability to disinfect itself.

On the other hand, the concentration of HOCl rises when the pH of the pool water decreases (pH becomes more acidic). HOCl is more likely to develop from the dissociation of chlorine-based compounds in acidic circumstances. The equilibrium between HOCl and OCl- changes in an acidic environment.

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