In this list of elements, which one would have the least lone pairs in its Lewis structure?A) Ge B) Si C) Pb D) In.

Answer:

The electrical conductivity of metals come from the fact that their outer electrons have been delocalised (meaning that the elections are not locked into atoms but can move freely throughout the metal ) .

And , the electrical conductivity of a metal is determined by the ease of movement of the electrons past the atoms under the influence of an electric field.

Answer: part 1 of 2

1. The amount required of H₂ = 11.0 g.

2. The amount required of O₂ = 88.0 g.

Explanation:

The balanced equation for the mentioned reaction is:

2H₂(g) + O₂(g) → 2H₂O,

It is clear that 2.0 moles of H₂ react with 1.0 mole of O₂ to produce 2.0 moles of H₂O.

Q1: How much hydrogen would be required to produce 5.5 mol of water?

Using cross multiplication:

2.0 mol of H₂ produce → 2.0 mol of H₂O, from stichiometry.

??? mol of H₂ produce → 5.5 mol of H₂O.

∴ the no. of moles of H₂ needed to produce 5.5 mol of water = (2.0 mol)(5.5 mol)/(2.0 mol) = 5.5 mol.

Now, we can get the mass of H₂ needed to to produce 5.5 mol of water:

mass of H₂ = (no. of moles)(molar mass) = (5.5 mol)(2.0 g/mol) = 11.0 g.

Q2: How much oxygen would be required?

Using cross multiplication:

1.0 mol of O₂ produce → 2.0 mol of H₂O, from stichiometry.

??? mol of O₂ produce → 5.5 mol of H₂O.

∴ the no. of moles of O₂ needed to produce 5.5 mol of water = (1.0 mol)(5.5 mol)/(2.0 mol) = 2.75 mol.

Now, we can get the mass of O₂ needed to to produce 5.5 mol of water:

mass of O₂ = (no. of moles)(molar mass) = (2.75 mol)(32.0 g/mol) = 88.0 g.

There is 1.0 mole of KNO₃ in 500.0 mL of a 2.0 M KNO₃ solution.

To determine the number of moles of KNO₃ in 500.0 mL of a 2.0 M KNO₃ solution, we need to use the equation:

moles = concentration (M) × volume (L)

Since 1 liter is equal to 1000 milliliters, we divide 500.0 mL by 1000 to get 0.5 L.

Next, we substitute the values into the equation:

moles = 2.0 M × 0.5 L

The concentration of 2.0 M indicates that there are 2.0 moles of KNO₃ in 1 liter of the solution. Therefore, multiplying the concentration (2.0 M) by the volume (0.5 L) gives us the number of moles of KNO₃:

moles = 2.0 M × 0.5 L = 1.0 mol

Hence, there is 1.0 mole of KNO3 in 500.0 mL of a 2.0 M KNO₃ solution.

know more about volume here:

https://brainly.com/question/29796637

#SPJ8

Answer:

identify the atoms on each side

count the atoms on its side

use coefficients to increase the atoms on each side

check to make sure you have the same number of each type of atom on each side

Answer:

3,4,2,1

Explanation:

The value of the coefficient of determination is 0.49.

The coefficient of determination, also known as R-squared (R²), measures the proportion of the total variation in the dependent variable (energy content) that can be explained by the independent variable (protein content). It provides a measure of how well the regression model fits the data.

The coefficient of determination is calculated by squaring the correlation coefficient (r), which represents the strength and direction of the linear relationship between the two variables.

In this case, the given information provides the correlation coefficient (r = 0.7), which indicates a moderate positive correlation between protein content and energy content.

To find the coefficient of determination, we square the correlation coefficient:

R² = r² = (0.7)² = 0.49

Therefore, the value of the coefficient of determination is 0.49.

Learn more about coefficient of determination

brainly.com/question/29581430

#SPJ11

Answer:

citric acid us found in juice of of lemon.

vinegar contains acetic acid.

hope this helps you.

Answer:

Antarctica

Explanation:

Shiny surfaces and white colours are good radiators of heat and light, hence antarctica have these features will reflect more solar radiation

The formula mass of ammonium nitrate is 80.043 g/mol and number of moles, n = 0.0099 mol.

Molar Mass of ammonium nitrate

80.043 g/mol

n = m / M

n = 0.800g / 80.043 g/mol

n = 0.0099 mol

No. Moles (mol) = Molarity (M) x Volume (L)

=0.800 / 44.0124 g/mol

0.0182 mole - 0.0099 = 0.0083

= 0.0083

Ammonium nitrate is frequently used in the production of nitrous oxide, fertilizers, pyrotechnics, herbicides, and insecticides. It serves as a nitrogen oxide absorbent, a component of freezing mixtures, a rocket propellant oxidizer, and a yeast and antibiotic nutrient.

To know more about Molarity :

https://brainly.com/question/8732513

#SPJ9

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

For more such questions on hydrocarbon visit:

https://brainly.com/question/21281906

#SPJ8

Water (and everything else) stays on Earth due to the combination of gravity and atmospheric pressure.

What is Atmosphericc Pressure?

Atmospheric pressure is the force exerted by the weight of the Earth's atmosphere on the surface below it. The Earth's atmosphere is composed of a mixture of gases, primarily nitrogen (78%) and oxygen (21%), along with other trace gases. These gases have mass and are attracted towards the center of the Earth by the force of gravity.

The pressure of the atmosphere decreases with increasing altitude because there is less atmosphere above, meaning that there is less weight and therefore less force pressing down. At sea level, the average atmospheric pressure is around 101.3 kilopascals (kPa) or 14.7 pounds per square inch (psi). This pressure can be measured with devices such as barometers.

Water on Earth does not fall off into space due to the force of gravity. Gravity is the force that attracts objects towards each other. The Earth's gravity is what keeps everything on the planet, including water, from floating away into space. As long as an object is within the Earth's gravitational field, it will be attracted towards the center of the planet.

Furthermore, the Earth's atmosphere also helps to keep water from falling off the planet. The atmosphere creates a layer of air around the Earth, which creates pressure that holds water molecules in place. This pressure is also caused by gravity, as the weight of the atmosphere presses down on everything below it, including water.

In summary, water (and everything else) stays on Earth due to the combination of gravity and atmospheric pressure.

Learn more about Atmosphericc Pressure from given link

https://brainly.com/question/19587559

#SPJ1

When the same solution and cuvette are used, the absorptivity coefficient and path length will be constant.

Absorptivity coefficient, also known as absorptivity, is a term used in chemistry to describe the amount of light or other electromagnetic radiation absorbed by a given substance when it passes through it. In simpler terms, it is the ratio of the absorbed energy to the incident energy. It is used to measure the ability of a substance to absorb light or radiation.

In analytical chemistry, the path length refers to the distance travelled by a beam of light or other radiation as it passes through a sample solution or gas. The path length is an important factor in determining the amount of light absorbed by a sample, which in turn can be used to measure the concentration of the sample.The relationship between absorptivity coefficient, path length and concentration is given by the Beer-Lambert law. This law states that the absorbance of a sample is directly proportional to the concentration of the sample and the path length, and inversely proportional to the absorptivity coefficient. When the same solution and cuvette are used, the absorptivity coefficient and path length will be constant.

To learn more about electromagnetic radiation check the link below-

https://brainly.com/question/1408043

#SPJ11

Answer:

Wavelength (λ) = 1.875 × 10⁻⁶ m

Explanation:

Given:

Energy (e) =  1.06 × 10⁻¹⁹ J

Find:

Wavelength (λ) = ?

Computation:

e = hc / λ

λ = hc / e

where c = 3 × 10⁸

Planck's constant (h) = 6.625 × 10⁻³⁴

So,

Wavelength (λ) = (6.625 × 10⁻³⁴)(3 × 10⁸) / (1.06 × 10⁻¹⁹)

1. Wavelength (λ) = 1.875 × 10⁻⁶ m

2. Given n = 4 to n = 3 both are integer not fraction so, electron is quantize

Iron-55 (55Fe) is a radioactive isotope of iron with a nucleus containing 26 protons and 29 neutrons.

Answer:

54

Explanation:

yep

Answer:

A because density DOES have a unit

Explanation:

The coefficient of \(PCl_3\) that will show that the law of conservation of mass is obeyed by the equation would be 2.

It states that mass can neither be created nor destroyed in chemical reactions but can be converted from one form to another.

Thus, in the reaction represented by the equation below:

\(2P + 3Cl_2 ---- > 2PCl_3\)

The coefficient of \(PCl_3\) must be 2 in order for the equation to balance and thus, obey the law of conservation of mass.

More on the law of conservation of mass can be found here:https://brainly.com/question/13383562

#SPJ4

Answer:

ummm

Explanation:

it’s B:)

Answer:

18,75 litres

Explanation:

4 NH3 + 3 O2 ---> 2 N2 + 6 H2O

n (NH3) : n (O2) = 4 : 3

<=>

V (NH3) : V (O2) = 4 : 3

Hence, V(O2) = 3 × V (NH3) ÷ 4 litres

V(O2) = 3 × 25.0 ÷ 4 litres

V(O2) = 75 ÷ 4 litres

V(O2) = 18,75 litres

If you have any questions, feel free to ask :)

Answer #1: Lithospheric plates are part of a planetary scale thermal convection system. The energy source for plate tectonics is Earth's internal heat while the forces moving the plates are the “ridge push” and “slab pull” gravity forces. It was once thought that mantle convection could drive plate motions.

Answer #2:Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. Subduction zones are sites that usually have a high rate of volcanism and earthquakes.

hope you find what you looking for

The amount of energy needed to raise the temperature of 20 grams of water from 25°C to 30°C is 418.4 Joules.

The specific heat capacity of water is approximately 4.184 J/(g·°C). To calculate the amount of energy needed to raise the temperature of 20 grams of water from 25°C to 30°C, we can use the following formula:

Q = m × c × ΔT

where Q is the amount of energy (in Joules), m is the mass of water (in grams), c is the specific heat capacity of water (in J/(g·°C)), and ΔT is the change in temperature (in °C).

Substituting the given values, we get:

Q = 20 g × 4.184 J/(g·°C) × (30°C - 25°C)

Q = 20 g × 4.184 J/(g·°C) × 5°C

Q = 418.4 J.

Learn more about specific heat capacity here:

https://brainly.com/question/29766819

#SPJ4

Explanation:

Balance the following equation: C3H8 + O2 ----> CO2 + H2O. (There will be no need for state symbols.) First of all, to balance these equations, list the number of each atom, for both sides of the equation. In this example, it would be: The first step would be to balance out the carbons on the products side by multiplying CO2 by 3.  The balanced chemical equation for C3H8 +O2 = CO2 + H2O is C3H8 +5O2 = 3CO2 +4H2O. This is the chemical reaction in which C3H8 or propane burns in air or oxygen to produce carbon dioxide and water.

The atmospheric concentration of a gas depends on its emission into the atmosphere and its rates of physical, chemical and biological removal. The time to lower the concentration of the gas to 37% of its original amount is its atmospheric lifetime.

The measurements of CO2 equivalents in parts per million CO2 is termed as atmospheric concentration. The pressure exerted by the atmosphere on the gas is called atmospheric pressure.

The atmospheric lifetime of a species mainly measures the time which is require to restore equilibrium in the atmosphere that follows a sudden decrease or increase in the concentration of the species in the atmosphere.

Emission is something which can be released, emitted or discharge.

Types of emission

Thus, we concluded that the atmospheric concentration of a gas depends on its emission into the atmosphere and its rates of physical, chemical and biological removal. The time to lower the concentration of the gas to 37% of its original amount is its atmospheric lifetime.

learn more about atmospheric concentration:

https://brainly.com/question/16657469

#SPJ4

Answer:

Parasitism. A symbiotic relationship between two species in which one benefits and the other is harmed.

Explanation:

:)

Answer:

omega.

Explanation:

The omega numbers simply reference how many carbons away from the methyl end of the fatty acid chain that the first carbon-carbon double bond appears. If the double bond is three carbons away, it's called an omega-3 fatty acid.

You can just write omega.

The AGO' (standard free energy change) can be calculated using the equation:
ΔG° = -RT ln(K)
where R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin, and K is the equilibrium constant.

Since the question does not specify a temperature, we cannot calculate an exact value for ΔG°. However, we can use the given equilibrium constant and some approximations to find the closest answer choice.

Using the given equilibrium constant of 1.38 x 10^4, we can take the natural logarithm of both sides to get:
ln(K) = ln(1.38 x 10^4)

Using a calculator, we find that ln(K) ≈ 9.53.

Assuming a temperature of 298 K (standard conditions), we can substitute the values into the equation above to get:
ΔG° = -RT ln(K) = -(8.314 J/mol·K)(298 K)(9.53) ≈ -19,870 J/mol ≈ -19.9 kJ/mol

Therefore, the closest answer choice is D) -16.96 kJ/mol.

Visit here to learn more about free energy  : https://brainly.com/question/15319033
#SPJ11

The standard free energy change (∆G°) can be calculated using the equilibrium constant (K) by the equation: ∆G° = -RT ln(K), where R is the gas constant (8.314 J/mol K) and T is the temperature in Kelvin. The Correct option is B -16.3 kJ/mol.

Given: K = 1.38 x \(10^4\)

We don't have the temperature, so we cannot calculate the exact value of ∆G°. However, we can determine the sign of ∆G° based on the value of K.

If K > 1, then ln(K) > 0 and ∆G° < 0 (exergonic reaction).

If K < 1, then ln(K) < 0 and ∆G° > 0 (endergonic reaction).

Since K = 1.38 x \(10^4\) > 1, we know that the reaction is exergonic and ∆G° is negative.

Therefore, the answer is (B) -16.3 kJ/mol.

Learn more about equilibrium constant

https://brainly.com/question/31321186

#SPJ4

Both students have correctly prepared a 1.0 M aqueous solution of potassium phosphate.

To determine which student has correctly prepared a 1.0 M aqueous solution of potassium phosphate (K₃PO₄), we need to compare their procedures.

Jennifer filled a 1.0 liter volumetric flask to calibration line having with water and then weighs out 212.3 g of potassium phosphate to add to the flask.

Joe, on the other hand, weighs out 212.3 g of the potassium phosphate as well as adds it to a 1.0 liter volumetric flask. He then fills the flask to the calibration line with water.

To determine the correct preparation method, we need to consider the molar mass of potassium phosphate (K₃PO₄), which we calculated previously as 212.27 g/mol.

Comparing the two methods;

Jennifer uses the correct amount of potassium phosphate (212.3 g), which corresponds to approximately 1 mole of K₃PO₄.

Joe also uses the correct amount of potassium phosphate (212.3 g), which corresponds to approximately 1 mole of K₃PO₄.

Both students have used the correct amount of potassium phosphate, which matches the molar mass of K₃PO₄. Therefore, both students have correctly prepared a 1.0 M aqueous solution of potassium phosphate.

To know more about aqueous solution here

https://brainly.com/question/1382478

#SPJ4

--The given question is incomplete, the complete question is

"An experiment in chm 2045 requires students to prepare a 1.0 M aqueous solution of potassium phosphate. Jennifer fills a 1.0 liter volumetric flask to the calibration line with water. She then weighs out 212.3 g of potassium phosphate and adds it to the volumetric flask. Joe weighs out 212.3 g of potassium phosphate and adds it to a 1.0 liter volumetric flask. He then fills the volumetric flask to the calibration line with water. Which student has correctly prepared a 1.0 M aqueous solution of potassium phosphate?"--

Both polarity and the ionic bond have positive and negative charges.

The term ionic bond has to do with the kind of bond in which there is a transfer of electrons from one atom to the other. The fact that there is a transfer of electrons means that one of the atoms would be positively charged while the other atom would be negatively charged.

We say that a bond is polar if there is an unequal sharing of electrons between the bonds in the compound. This is not a total transfer of electrons but a partial positive and negative charge that is developed based on the proximity of the electron pair.

Learn more about ionic bond:https://brainly.com/question/9075398

#SPJ1