(URGENT!!!!!) the electron configuration of some elements are given. Based on the electron configuration which ELEMENTS can likely form ions with multiple charges?


a) zinc [Ar] 3d¹⁰4s²
b) iron [Ar] 3d⁶4s²
c) sodium [Ne] 3s¹
d) cobalt [Ar] 3d⁷ 4s²
e) silver [Kr] 4d¹⁰ 5s¹​

Using the ideal gas law, we can determine the pressure of carbon dioxide in the metal cartridge.

By assuming the volume of the tire remains constant, we can calculate the gauge pressure that the carbon dioxide can provide to inflate the tire.

We can use the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the given temperature of 299 K to Kelvin. Then, we can determine the number of moles of carbon dioxide in the cartridge by dividing the mass of carbon dioxide (16.0 g) by its molar mass.

Next, we substitute the values into the ideal gas law equation to solve for the pressure (P) of the carbon dioxide in the cartridge.

To find the gauge pressure, we need to subtract the atmospheric pressure (14.7 psi) from the total pressure calculated using the ideal gas law.

Finally, we assume the volume of the tire remains constant, and we can calculate the gauge pressure by dividing the pressure in the cartridge by the volume of the tire (3.81 L).

The resulting value will indicate the pressure to which the carbon dioxide in the cartridge can inflate the mountain bike tire.

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Answer:1. How many moles is 400.0 g of Al 2(SO4)3?

Mol = mass/molar mass

Mol = 400.0g/342g/mol = 1.169 mol

2. Which is the percent composition of bromine in the compound NaBr?

% Br = (mass Br/mass NaBr) x 100

% Br = (79.90g/102.88g) x 100 = 77.7%

3.How many molecules are in 3.6 grams of NaCl?

Molecules NaCl = 3.6g NaCl x 6.02 x 1023 NaCl molecules = 3.7 x 1022 molecules

58.43g NaCl

4.How many grams are in 1.946 moles of NaCl?

From Mol = mass/molar mass,

Mass = mol x molar mass

Mass NaCl = 1.946 mol x 58.43 g = 113.7 g

Explanation:

A 60 kg man would need a 8000 meters of total foot edge to be supported by surface tension.

Many insects can walk on the water, because of the surface tension at the water surface.

Surface water molecules attract more strongly to the water molecules around them and create a high surface tension with smaller surface area of a water.

The water molecules at the surface do not have other water molecules to form hydrogen bonds, only below and to either sides, like other water molecules that hydrogen bond with other water molecules on all sides.

The surface tension at the water surface is not strong enough to support man on the water.

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Answer: greater, stronger

Explanation: Bonds that form as a result of sharing their electrons are called covalent bonds. A lot of energy is contained in those bonds, especially if they are higher order. A single bons is bond order 1, A triple bond is bond order 3. An example of a triple bond is acetylene. It combusts with a very hot flame when it's triple bond is broken with oxygen.

The compound with molecular formula C₁₀H₁₂O that fits the spectroscopic data provided is an 1,3-dimethylcyclohexanol.


The infrared (IR) spectroscopy value of 1680 cm⁻¹ indicates the presence of an alkene functional group in the molecule.
The 1H nuclear magnetic resonance (NMR) spectroscopy data indicates the presence of three different types of hydrogens: 1.08 ppm (triplet, I=3), 1.5 ppm (sextet, I=2), 2.6 ppm (triplet, I=2), 7.4 ppm (triplet, I=2), 7.5 ppm (triplet, I=1) and 7.9 ppm (doublet, I=2). The multiplicities and chemical shift values suggest that there is an aromatic ring system in the molecule with methyl substituents, which is consistent with the structure of 1,3-dimethylcyclohexanol.

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Answer:

220g of CO2

Explanation:

Step 1:

The balanced equation for the reaction.

2C5H11OH + 15O2 —> 10CO2 + 12H2O

Step 2:

Determination of the number of mole of CO2 produced by burning 1 mole of C5H11OH.

From the balanced equation above,

2 moles of C5H11OH produced 10 moles CO2.

Therefore, 1 mole of C5H11OH will produce = (1 x 10)/2 = 5 moles of CO2.

Therefore, 5 moles of CO2 is produced from the reaction.

Step 3:

Conversion of 5 moles of CO2 to grams.

Molar mass of CO2 = 12 + (2x16) = 44g/mol

Number of mole of CO2 = 5 moles

Mass of CO2 =...?

Mass = mole x molar mass

Mass of CO2 = 5 x 44

Mass of CO2 = 220g.

Therefore, 220g of CO2 were obtained from the reaction.

Answer:

1.57×10²³ molecules

Explanation:

Given data:

Number of molecules of ethanol = ?

Volume of ethanol = 15.0 mL

Density of ethanol = 0.789 g/mL

Solution:

Mass of ethanol :

Density = mass/ volume

0.789 g/mL = mass/ 15.0 mL

Mass = 0.789 g/mL× 15.0 mL

Mass = 11.84 g

Number of moles of ethanol:

Number of moles = mass/molar mass

Number of moles = 11.84 g / 46.07 g/mol

Number of moles = 0.26 mol

1  mole contain 6.022×10²³ molecules

0.26 mol × 6.022×10²³ molecules / 1mol

1.57×10²³ molecules

There are a lot you want to know about heat transfer.

If u understand the mode of heat transfer well, then heat transfer is easy to continue.

Answer:

1: They give to the body Vitamin  D 2: they give solar energy and that is what gives us revaluation around the sun (Drag) 3: it gives plants energy for photosynthesis (or dont know)

4:solar panels gives energy by the sun radio controlled area that gives us the battery's, lights etc...

Explanation:

EXPLAIN IT

This question is incomplete, here´s the complete question.  

How does the percentage of monounsaturated and polyunsaturated fatty acids in olive oil compare to that of canola oil? Match the words in the left column to the appropriate blanks in the sentences on the right.

Olive oil has about ____ monounsaturated fats, while canola oil has about ___.

Olive oil has about ___ polyunsaturated fats, while canola oil has about ___.

6%

10%

30%

84%

5%

65%

Answer:

Olive oil has about 84% monounsaturated fats, while canola oil has about 65%.

Olive oil has about 5% polyunsaturated fats, while canola oil has about 30%.

Explanation:

Olive and canola oil are the major sources of monounsaturated fatty acids. Although vegetable oils usually have high concentrations of polyunsaturated fatty acids and less monounsaturated fats, olive and canola oils have comparatively less polyunsaturated fatty acids, and more monounsaturated fatty acids.

1) Draw the reactants in their anti-periplanar conformation.

2) Eliminate one of the hydrogens, forming a double bond between the two remaining atoms.

3) Consider the stereochemistry of the reaction to determine if the double bond is in a cis or trans conformation.

4) The resulting product is the major product formed from the elimination reaction.

The reaction you have provided is an elimination reaction, in which an alkene product is formed. The products of this reaction will depend on the reactants provided and the conditions used for the reaction. In particular, the major product of this reaction will be the one that follows the Zaitsev’s rule. When considering the stereochemistry of the reaction, the anti-periplanar conformation of the reactants must be taken into account.

The major product of the following elimination reaction will be an alkene with the double bond formed in the anti-periplanar conformation that follows Zaitsev's rule.

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The pressure of the H2 collected if the temperature was 26°C is 2.2195 x 10⁵ Pa

Pressure is described as the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

The ideal gas law may be written as

P = pRT/M

where

p = pressure

ρ =density

T = temperature

M = molar mass

R = 8.314 J/(mol-K)

For the given scenario,

ρ = 0.09 g/L = 0.09 kg/m³

T = 26°C = 26+273 K = 299 K

M = 1.008 g/mol = 1.008 x 10⁻³ kg/mol

Substituting into the equation of P = pRT/M, we have

P = 2.2195 x 10^5 pa.

we know that 1 atm = 101325 Pa

Therefore

p = 2.2195 x 10⁵ Pa

  = 221.95 kPa

  = (2.295 x 10⁵)/101325 atm

  = 2.19 atm

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An aqueous potassium iodate (KIO₃) solution is made by dissolving 545 grams of KIO₃ in sufficient water so that the final volume of the solution is 2.10 L. The molarity of the KIO₃ solution is 1.21 M.

The given details are,

Mass of KIO₃ = 545 g

The volume of solution = 2.10 L

The formula for Molarity (M) is: Molarity (M) = (Number of moles of solute) / (Volume of solution in litres)

Now, we need to find out the molarity of the given potassium iodate (KIO₃) solution.

First, we need to find the number of moles of KIO₃ present in the given solution by using the formula,

Number of moles of solute = (Given Mass of solute) / (Molar mass of solute)

The molar mass of KIO₃:

K = 39.1 g/molI = 126.9 g/molO = 16 g/mol

Total molar mass of KIO₃ = (39.1 + 126.9 + 48) g/mol = 214 g/mol

Now,

Number of moles of KIO₃ = (Given Mass of KIO₃) / (Molar mass of KIO₃)

= 545 / 214

= 2.545 mol

Now, we can calculate the molarity of the solution.

Molarity (M) = (Number of moles of solute) / (Volume of solution in liters)

= 2.545 / 2.10

= 1.21 M

Thus, the molarity of the given potassium iodate (KIO₃) solution is 1.21 M.

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Avogadro’s wide variety, the wide variety of gadgets in a single mole of any substance (described as its molecular weight in grams), is the same as 6.02214076 × 1023. The gadgets can be electrons, atoms, ions, or molecules, relying on the character of the substance and the individual of the reaction (if any).

Avogadro's Law

Avogadro's law states that an "equal volume of all gases at the same temperature and pressure contain the same number of molecules"

For example:-

18g of water = 1 mole = 6.022* 10²³ molecules of water

1.008g of hydrogen = 1 mole = 6.022 *10²³ atoms of hydrogen

96.06g of SO₄²- ion = 6.022*10²³ ions of SO₄²-.

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When an ester is hydrolyzed with water and sulfuric acid, the products formed are an alcohol and a carboxylic acid. This reaction is also known as saponification.

During the reaction, the ester bond is broken and the water molecule is split into a hydrogen ion (H+) and a hydroxide ion (OH-). The H+ ion reacts with the ester, causing it to break down into its alcohol and carboxylic acid components. The carboxylic acid is formed by the addition of the hydroxide ion to the carbonyl group of the ester. The alcohol is formed by the addition of the hydrogen ion to the oxygen atom of the ester. The resulting products are a carboxylic acid and an alcohol that are both hydrolyzed from the original ester.

1. Identify the ester you want to hydrolyze. An ester has the general structure RCOOR', where R and R' are alkyl or aryl groups.
2. In the hydrolysis reaction, water (H2O) is used as a reactant along with sulfuric acid (H2SO4) as a catalyst.
3. The ester (RCOOR') reacts with water (H2O) in the presence of sulfuric acid (H2SO4).
4. The hydrolyzed products formed are a carboxylic acid (RCOOH) and an alcohol (R'OH).

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By finding the vertex of the parabola, we will see that the firework reaches the maximum height in 2.25 seconds.

The height of the firework is given by:

h = -16*t^2 + 72*t + 520

This is a quadratic equation, the maximum will be at the vertex.

Remember that for a quadratic equation:

y = a*x^2 + b*x + c

The x-value of the vertex is:

x = -b/2a.

Then for our equation:

h = -16*t^2 + 72*t + 520

The vertex will be at:

t = -72/(2*-16) = 2.25s

This means that the firework will reach the maximum height in 2.25 seconds.

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he consequence likely to occur because of Misha's inconsistent recording of checks in her check register is an inaccurate account balance and potential financial difficulties.

By failing to consistently record checks in her check register, Misha may lose track of the accurate balance in her account. This can lead to several negative consequences:

Overdrawing: If Misha forgets to record checks and withdraws more money than she has recorded, she may accidentally overdraw her account, resulting in overdraft fees and potential financial penalties.

Bounced Checks: Inaccurate record-keeping can lead to writing checks without sufficient funds in the account. These "bounced checks" can incur additional fees, damage Misha's credit score, and strain her relationships with payees.

Difficulty Budgeting: Without accurate records, Misha may struggle to budget effectively and plan for upcoming expenses, potentially leading to financial stress and the inability to meet financial obligations.

Overall, the consequence of the inconsistent recording of checks in Misha's check register is an inaccurate account balance, which can result in financial difficulties and other negative consequences.

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Le Chatelier's principle predicts that the moles of H2 in a reaction container will increase if the equilibrium is disturbed by a decrease in pressure or an increase in temperature.

This is because, in order to counteract the change in conditions and maintain equilibrium, the reaction will shift in the direction that produces more moles of gas.

Consider the reaction N2(g) + 3H2(g) 2NH3 as an example (g). If the pressure is reduced, the equilibrium will shift to the side with more moles of gas (in this case, the reactants) to compensate for the pressure reduction. This means that the number of moles of H2 will rise. Similarly, as the temperature rises, the equilibrium shifts in the direction of producing more moles of gas, resulting in an increase in the moles of H2.

Le Chatelier's principle states that when a system at equilibrium is subjected to a change in temperature, pressure, or concentration of reactants or products, the system will adjust its equilibrium position in a way that tends to counteract that change. This principle helps predict how a system will respond to changes and can be used to optimize reaction conditions for a desired outcome.

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The net ionic equation for potassium fluoride and ammonium chloride is

NH_4^++F^-(aq)--->NH_3(aq)+HF(aq)

Generally, The net ionic equation can simply be defined as a chemical equation that records solely those species experiencing the reaction.

Therefore,  net ionic equation for potassium fluoride and ammonium chloride

NH_4Cl(aq) and KF(aq) are both salys

Therefore, the ionic equation excludes them and is

NH_4^++F^-(aq)--->NH_3(aq)+HF(aq)

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The opposite of heterotroph is autotroph.

What is heterotroph?

An organism is referred to as a heterotroph if it consumes other plants or animals for food and energy. Its origins are in the Greek words hetero, which means "other," and trophe, which means "nutrition."

Examples - Human, birds, dogs, etc.

What is autotroph?

A primary producer, also known as an autotroph, is an organism that uses energy from light or inorganic chemical reactions to create complex organic chemicals from simple ones, such as carbon dioxide.

Example - plants, algae etc.

The opposite of heterotroph is autotroph.

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Answer:

94.1 %

Explanation:

We firstly determine the equation:

2H₂O + O₂ →  2H₂O₂

2 moles of water react to 1 mol of oxygen in order to produce 2 moles of oxygen peroxide.

We convert the mass of oxygen to moles:50 g . 1mol /32g = 1.56 mol

Certainly oxygen is the limiting reactant.

2 moles of water react to 1 mol of oxygen.

13 moles of water may react to 13/2 = 6.5 moles. (And we only have 1.56)

As we determine the limiting reactant we continue to the products:

1 mol of O₂ can produce 2 moles of H₂O₂

Then 1.56 moles of O₂ will produce (1.56 . 2) = 3.125 moles

We convert the moles to mass: 3.125 mol . 34 g/mol= 106.25 g

That's the 100% yield or it can be called theoretical yield.

Percent yield = (Yield produced / Theoretical yield) . 100

(100g / 106.25 g) . 100 = 94.1 %

Answer:

then it is 5

Explanation:

because i said it is

Answer:

C. Partial charges in water molecules attract the charges in the atoms of the ionic crystal, pulling the atoms off the crystal.

Explanation:

Water consists of partial positive and hydrogen ions and partial negative oxygen ions. The ionic crystals also dissociate into ions when in water.These partial charges and ability of ionic compounds to dissociate in water are the main reason why ionic crystals dissolve in water.

The partial charges in the water molecules form a strong attraction towards the charges in the atoms of ionic crystals. This then pulls the atoms from the crystals and ends up in the dissolution of the ionic crystals.

Answer:

90 grams. Input mass = output mass

Explanation:

The final temperature of the two substances after they are allowed to reach thermal equilibrium will be closer to the initial temperature of substance B.

This is because the specific heat capacity of substance B is two times that of substance A, meaning it takes twice as much energy to change the temperature of substance B by one degree. Additionally, the mass of substance A is four times the mass of substance B, meaning it has more thermal energy to transfer to substance B.

When the two substances are brought together and allowed to reach thermal equilibrium, the thermal energy will transfer from the substance with the higher temperature to the substance with the lower temperature until they are at the same temperature. Since substance B has a higher specific heat capacity and a lower mass, it will require more thermal energy to reach the same temperature as substance A. Therefore, the final temperature of the two substances will be closer to the initial temperature of substance B.

In conclusion, the final temperature of the two substances after they are allowed to reach thermal equilibrium will be closer to the initial temperature of substance B due to its higher specific heat capacity and lower mass.

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Here O2 is the limiting reactant and the corresponding theoretical yield of water is 3.00 g of H_2O

Here 0.23 moles of acetic acid and 8 grams of oxygen gas are placed in a reaction vessel and a combustion reaction takes place.

To find out the limiting reactant and corresponding theoretical yield of water, we need to solve this question by following the below steps:

Step 1: Balanced chemical equation for the combustion of acetic acid.`2C2H4O2 + 6O2 → 4CO2 + 4H2O`

Step 2: Find the molar mass of each compound.`

Molar mass of C2H4O2 = (2 x 12.01) + (4 x 1.01) + (2 x 16.00) = 60.05 g/mol

Molar mass of O2 = (2 x 16.00) = 32.00 g/mol

`Step 3: Calculate the number of moles of each compound.`Moles of C2H4O2 = 0.23 mol

Moles of O2 = (8 g / 32.00 g/mol) = 0.25 mol

Step 4: Determine the limiting reactant. The limiting reactant is the reactant that is completely consumed in the reaction.

Moles of C2H4O2 = 0.23 mol

Moles of O2 = 0.25 mol

Now 2C2H4O2 + 6O2 → 4CO2 + 4H2O

Therefore, O2 is the limiting reactant.

`Step 5: Next we have to calculate the theoretical yield of water.Theoretical yield is the maximum amount of product that can be produced from the limiting reactant.`Moles of O2 = 0.25 mol

We can see that for every 6 moles of oxygen, we get 4 moles of water .So, for 0.25 moles of oxygen, we get the following amount of water:(4/6) x 0.25 = 0.1667 moles of water

Molar mass of H2O = (2 x 1.01) + 16.00 = 18.02 g/mol

Theoretical yield of water = Number of moles of water x Molar mass of water`= 0.1667 mol x 18.02 g/mol = 3.00 g of H2O`So,

The limiting reactant is O2 and the corresponding theoretical yield of water is 3.00 g of H_2O.

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Answer:

A chemical formula tells us the number of atoms of each element in a compound.

Explanation:

Explanation:

formula shows

Answer:

D. The flesh should return to normal after you press it.

Explanation:

The water content stored in the flesh of the fish, paired with the elasticity are both indicators of freshness, and will cause the flesh to return to normal after its been pressed.