How many P atoms are there in 4.35 moles of P?

Electronic configuration of carbon at excited state is 1s₂, 2s₂, 2p₂. so, option A is correct.

What is electronic configuration ?

According to electronic configurations, each electron moves individually within an orbital while being surrounded by an average field produced by all other orbitals.

Electronic configuration includes the number of shell, orbit, orbital. s, p, d, f different shell present in it.

One orbital can house a maximum of two electrons, and there are four different types of orbitals (s, p, d, and f). More electrons can be held in the p, d, and f orbitals since they contain various sublevels.

As was said, each element's position on the periodic table determines the specific electron configuration of that element.

Thus, option A is correct.

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Answer:

.. ..

:O = C - Cl:

.. | ..

:Cl:

..

The red line showing the IR spectrum emitted from the earth's surface does not match the blue line showing the expected IR spectrum from a 300˚C object because:

IR spectroscopy studies Infrared (IR) light in the electromagnetic spectrum.

Sensors are used by thermal detection systems, also known as infrared detection systems, to detect radiation in the infrared region of the electromagnetic spectrum.

In order to create an electronic signal, an infrared camera must first detect the thermal energy or heat, that the scene being seen emits. After processing this signal, an image is created.

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Answer:

20.4 miles.

Explanation:

We know he usually rides his bike at 15mph, and if we subtract 3 from that we get 12 miles per hour. Now if we multiply by the amount of time (1.7 hours) we'll find our answer. 12 x 1.7 = 20.4

Answer:

20.4

Explanation:

I just had the question.

We can be able to determine the amount of toxic lead in the water by thee use of  atomic absorption spectrophotometry.

A toxic metal is known as any metal that is able to affect the health of people. We know that toxic metals are mostly the metals that are in the group of the heavy metals.

Now we know lead as a metal that is able to cause brain damage especially in children. This is why it is very important that there should be a thorough examination in order to know the amount of lead that is present in water.

There are several methods that could be applied in the determination of lead and one of the most common methods is by the use of atomic absorption spectrophotometry which is able to detect even the minutest amount of the led in solution.

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Answer:

Wood

Explanation:

Matter is anything that has mass. Nor sound, fire or electricity have mass which leaves wood as the final answer.

Answer:

see below

Explanation:

K.E. = 1/2 * m * v^2

      = 1/2 * 2 * 5^2     j

Kilograms of HF are needed to completely react with 7.01 kg 0f UO₂ is 2.077 kg.

it is given that ,

mass of UO₂ = 7.01 kg = 7010 g

molar mass of UO₂ = 270.03 g/mol

molar mass of HF = 20.01 g/mol

mass of HF = ?

the balanced chemical equation is given as:

UO₂  +  4HF ------->   UF₄   +   2H₂O

NOW,

no. of moles of  UO₂ =  mass / molar mass

                         = 7010 g /270.03 g/mol

                         = 25.96 moles

from equation it is clear that 1 mole of UO₂ react with 4 moles of HF

25.96 moles of UO₂ = 4 × 25.96 moles of HF

                                  103.84 mol of HF

therefore,

mass of HF = no. of moles × molar mass

                   =   103.84 mol × 20.01 g/mol

                   =  2077.83 g

in kg , 2077,83 g = 2.077 kg

Thus, Kilograms of HF are needed to completely react with 7.01 kg 0f UO₂ is 2.077 kg.

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Answer:

130 Liters

Explanation:

if 1 mol is 22.4 L, then 5.8 mol is 130 L (129.92 but use sig figs)

Answer:

The lumps should be removed in brown sugar and to be rolled with rolling pin.

Explanation:

In preparing brown sugar as ingredients in baking and pastry, it is important to check if the sugar is lumpy. Although it is not the main ingredient in baking, it is important to check because it could affect the texture of the mixtures. Brown sugar is also much nutritious to white sugar  that is why it is more commonly use. The brown sugar become lumpy because when brown sugar is exposed to air it gets harder because the molasses that keeps its soft evaporates that makes the sugar stick together. The rolling pin helps the lump to break up.

CH3Cl would have a dipole moment, oriented from the H atoms towards the Cl atom.

This is because the Cl atom is more electronegative than the H atoms, so the electrons in the covalent bond between them will be pulled more towards the Cl atom. This creates an uneven distribution of charge and a net dipole moment.

CH3Cl, also known as chloromethane or methyl chloride, is a colorless, flammable gas with a sweet odor. It is a hydrocarbon, meaning it consists of hydrogen and carbon atoms, and is classified as a haloalkane due to the presence of a chlorine atom. CH3Cl is used in a variety of industrial processes, including as a refrigerant and a propellant. It is also used to produce other compounds, such as acetic acid and methylene chloride.

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Answer:

3.5 * 10^24

Explanation:

1 mole of anything is equal to 6.022*10^23 (like how 1 dozen of anything is equal to 12).
5.8 mole would therefor be 5.8 * 6.022 * 10^23, since you have 5.8 moles.
5.8 * 6.022 * 10^23 simplifies to 3.49276*10^24, but since only 2 significant figures are given, the number should be rounded to 3.5*10^24

Answer:

b

Explanation:

Answer:

answer b I think so I'm.not clear about it ,I think its CRT ans plz follow me

Answer:

don't understand make it clear

Answer:

C) one magnesium and one oxygen

Answer:

C. Carbon monoxide

Explanation:

Chemical substance which has a triple covalent bond is carbon monoxide.

Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.

Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.

Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.

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Answer:

covalent bond

Explanation:

a covalent bond forms when electrons are shared between two nonmetals

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Answer:

b) spruce tree

Explanation:

Producers have the capability to produce their own food and energy and are often at the bottom of the food chain. Of the given answers, a white spruce is the only organism that is capapble of producing its own food, therefore it is a producer.

Answer:

AgNO3

Explanation:

Silver nitrate (AgNO3) is an inorganic compound. Organic compounds usually have 1+ C.

Answer:

c

Explanation:

Answer:

Infer and form a hypothesis

Answer:

To find the pressure at which the solubility of the gas would be 0.2 g/L, we can use the concept of Henry's Law. Henry's Law states that the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid.

The equation for Henry's Law is:

S = k * P

Where:

S is the solubility of the gas in the liquid (in g/L)

k is the Henry's Law constant (which depends on the specific gas and liquid)

P is the partial pressure of the gas above the liquid (in atm)

We can set up a proportion to find the unknown pressure (P2) when the solubility (S2) is 0.2 g/L:

S1 / P1 = S2 / P2

Substituting the given values:

0.028 g/L / 3.5 atm = 0.2 g/L / P2

Now we can solve for P2:

P2 = (0.2 g/L * 3.5 atm) / 0.028 g/L

P2 = 24.5 atm

Therefore, at a pressure of 24.5 atm, the solubility of the gas would be 0.2 g/L.

Explanation:

• Na ( Sodium ) has atomic number 11 and hence 11 electrons.

[Cation :- ions with positive charge ( atoms which donate one electron gains one positive charge ) ]

[ anion :- ions with negative charge ]

• Mg^(+1) after loosing one electron gains +1 charge

• Al^(+2) after loosing two electrons gains +2 charge .

Chemical symbols for three different atoms or atomic cations with 11 electrons are;\(Al^{2+}, Na, Mg^+\)

Atoms or atomic cations with 11 electrons would typically have the electron configuration of 1s² 2s² 2p⁶ 3s². Atoms or ions with 11 electrons typically fill the first three energy levels with the electron configuration 1s² 2s² 2p⁶ 3s². Sodium (Na) has 11 electrons and forms the sodium ion (Na⁺) by losing one electron.

Magnesium (Mg), with an atomic number of 12, loses one electrons to form the magnesium ion (Mg⁺). These examples illustrate how atoms or ions with 11 electrons can have different chemical symbols and charges based on their electron interactions.

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The percent by mass of nitrogen in ammonia (NH3) is approximately 82.15%

Calculating the mass of nitrogen to the total mass of the compound and then expressing the result as a percentage will allow us to determine the percent by mass of nitrogen in NH3 (ammonia).

Ammonia's molecular structure, NH3, indicates that it is made up of one nitrogen atom (N) and three hydrogen atoms (H). We must take both the molar masses of nitrogen and ammonia into account when calculating the percent by mass of nitrogen.

Nitrogen's (N) molar mass is roughly 14.01 g/mol. The molar masses of nitrogen and hydrogen are added to determine the molar mass of ammonia (NH3). Since hydrogen's molar mass is around 1.01 g/mol, ammonia's molar mass is:

(3 mol H 1.01 g/mol) + (1 mol N 14.01 g/mol) = 17.03 g/mol = NH3.

Now, we can use the following formula to get the nitrogen content of ammonia in percent by mass:

(Mass of nitrogen / Mass of ammonia) / 100% is the percentage of nitrogen by mass.

Ammonia weighs 17.03 g/mol and contains 14.01 g/mol of nitrogen by mass. By entering these values, we obtain:

(14.01 g/mol / 17.03 g/mol) 100% 82.15 % of nitrogen by mass

Ammonia (NH3) has a nitrogen content that is roughly 82.15 percent by mass.

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In Atlanta, GA, certain seasons are associated with poorer air quality due to various factors such as weather conditions, human activities, and geographical location.

Typically, the seasons with the worst AQI in Atlanta, GA, are summer and early fall. This is primarily due to the combination of high temperatures, stagnant air masses, and increased pollution from various sources.

During the summer months, Atlanta experiences hot and humid weather, which can contribute to the formation of ground-level ozone. Ozone is a harmful pollutant that is created when pollutants from vehicles, power plants, and industrial activities react with sunlight and heat. High levels of ozone can cause respiratory issues and other health problems.

In addition to ozone, Atlanta also experiences increased levels of particulate matter (PM) during the summer and early fall. PM refers to tiny particles suspended in the air, which can come from sources such as vehicle exhaust, industrial emissions, and wildfires.

These particles can be inhaled into the lungs and can have detrimental effects on respiratory health.

It's important to note that air quality can vary from year to year and is influenced by various factors. Local regulations, weather patterns, and changes in pollutant emissions can all impact the AQI during different seasons.

Monitoring air quality reports and taking necessary precautions such as reducing outdoor activities during times of poor air quality can help individuals stay informed and protect their health.

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Answer:

Robert Delaunay's Homage to Blériot (1914) was inspired by the first flight across the English channel.

Drinking water contains a mixture of anions and cations which are monitored and managed to avoid adverse health or environmental effects.

What is an anion?

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Carbon-14 is a radioisotope of carbon that decays following first-order kinetics. There are four values of interest in this problem: the "normal" (or original) amount of carbon-14 for a jawbone (\(\mathrm{N_0}\)), the actual amount of carbon-14 in a jawbone (\(\mathrm{N}\)), the half-life of carbon-14 (\(\mathrm{t_{1/2}}\)), and the actual time elapsed (\(\mathrm{t}\)) from the original time. There is an equation that ties all these values in together,

\(N= N_0 e^{-kt}\)

where k is the rate constant, which, for first-order decay, is related to the half-life by

\(k = \dfrac{\ln 2}{ t_{1/2} }.\)

What you want to find here is the time elapsed (t). So, you can substitute the latter equation for k into the k in the former equation to get

\(N= N_0 e^{\frac{-\ln 2 \;t}{t_{1/2}}.\)

Rearranging to solve for t, the equation becomes

\(t = \left(\dfrac{\ln \dfrac{N_0}{N}}{\ln 2} \right) t_{1/2}.\)

You are given all three of the values necessary to solve for t: The normal amount of carbon-14 is 200 mg; the actual amount of carbon-14 in the sample is 50 mg; and the half-life of carbon-14 is 5730 years. Plugging them into the above equation, we get

\(t = \left(\dfrac{\ln \dfrac{200 \text{ mg}}{50 \text{ mg}}}{\ln 2} \right) \left(5730 \text{ years} \right) = 11460 \text{ years}.\)

So the jawbone found is 11460 years old (or 11000 if accounting for sig figs).

The heat in KG needed to warm up 1.25 pounds of ice from -5.00 Fahrenheit to 135 Fahrenheit specific heat for water 1.00 cal/g C is 347.1 kJ

First, we need to convert the given values to the metric system, which is the standard system for scientific calculations:

1.25 pounds = 0.567 kilograms (1 pound = 0.453592 kilograms)

-5.00 Fahrenheit = -20.56 Celsius (using the formula (°F - 32) x 5/9 = °C)

135 Fahrenheit = 57.22 Celsius

Next, we need to calculate the amount of heat required to warm up the ice from -20.56 °C to 0 °C (the melting point of ice) and then to warm up the resulting water from 0 °C to 57.22 °C:

Heating ice from -20.56 °C to 0 °C:

Heat required = mass x specific heat x

= 23,464.27 J

Melting ice to water at 0 °C:

Heat required = mass x heat of fusion of ice

Heat required = 0.567 kg x 334,000 J/kg

Heat required = 189,678 J

Heating water from 0 °C to 57.22 °C:

Heat required = mass x specific heat x temperature change

Heat required = 0.567 kg x 4.184 J/g°C x (57.22 - 0)

Heat required = 133,951.13 J

The total heat required to warm up 1.25 pounds of ice from -5.00 Fahrenheit to 135 Fahrenheit is the sum of the heat required in each step:

Total heat required = 23,464.27 J + 189,678 J + 133,951.13 J

Total heat required = 347,093.4 J

Finally, we can convert the result to kilojoules (kJ) by dividing by 1000:

Total heat required = 347.0934 kJ

Therefore, approximately 347.1 kJ of heat is needed to warm up 1.25 pounds of ice from -5.00 Fahrenheit to 135 Fahrenheit.

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