1. The region north of 66½° N latitude is the Arctic Circle. Use the simulator to determine the length of the day during each time of year.
Answer:
Time of Year Length of Day (in hours)
Winter solstice
Spring equinox
Summer solstice
Fall equinox

The mass of the oxygen that reacted is 70.4 g.

The reaction between iron and oxygen is called rusting and is a oxidation process. The balanced chemical equation for the reaction is:

4 Fe + 3 O2 -> 2 Fe2O3

Number of moles of iron = 168 g/56 g/mol = 3 moles

Number of moles of iron III oxide = 232 g /160 g/mol

= 1.45 moles

The mass of the oxygen that reacted is;

If 3 moles of oxygen produces 2 moles of oxide

x moles of oxygen would produce 1.45 moles ofn the oxde

x = 3 * 1.45/2

= 2.2 moles

Mass of the oxygen = 2.2 moles * 32 g/mol

= 70.4 g

Learn more about reaction:https://brainly.com/question/28984750

#SPJ1

Answer:

43.4%

Explanation:

Answer: An Ecosystem

Explanation:

The median reaction at the second end point in the HCl and NaOH titration is: HCl + NaOH → NaCl + H2O

In a titration between hydrochloric acid (HCl) and sodium hydroxide (NaOH), the reaction involved is the neutralization reaction between an acid and a base. The balanced equation for this reaction is:

HCl + NaOH → NaCl + H2O

In this reaction, one mole of HCl reacts with one mole of NaOH to form one mole of NaCl (sodium chloride) and one mole of water.

During the titration process, the reaction occurs gradually as the base is added to the acid solution.

The first end point of the titration is reached when the moles of HCl and NaOH are stoichiometrically equivalent, meaning they react in a 1:1 ratio. At this point, all the HCl has been neutralized by the NaOH, and no excess of either reagent remains.

However, if the titration is continued beyond the first end point, the reaction between HCl and NaOH can still occur, albeit in a different ratio.

The second end point refers to the point where the moles of NaOH added exceed the stoichiometrically required amount to neutralize the HCl completely. As a result, any excess NaOH added after the second end point reacts with the excess HCl in a 1:1 ratio.

Therefore, the median reaction at the second end point in the HCl and NaOH titration is:

HCl + NaOH → NaCl + H2O

For more such question on  median reaction visit:

https://brainly.com/question/14189499

#SPJ8

The question requires us to calculate the percent composition of carbon (C) in Fluticasone, given that its molecular formular is:

The percent composition corresponds to the percent by mass of each element in a compound. We can calculate it for a given element by dividing the amount, in mass of this element, contained in the molecule by the total mass of the molecule.

To solve this question, we need to calculate:

1) how much of carbon is there in the molecule given (considering its atomic mass and number of C atoms in the molecule)

2) the molar mass of the compound, considering all elements that compose it

3) the percent composition of C.

Next, we'll go through the steps above to solve the problem:

1) The atomic mass of carbon is 12.0107 u and we can see that there are 22 atoms of carbon in the molecular formula of Fluticasone. Thus, we can calculate the total amount of carbon in Fluticasone as:

Therefore, there are 264.235g of C in the molecule of Fluticasone.

2) Now, we need to calculate the total molar mass of Fluticasone, considering all elements that are part of this molecule. We'll need the following atomic masses:

atomic mass (C) = 12.107 u

atomic mass (H) = 1.00784 u

atomic mass (F) = 18.9984 u

atomic mass (O) = 15.999 u

atomic mass (S) = 32.065 u

We can calculate the molar mass of Fluticasone from the number of atoms of each element and their respective atomic mass:

Therefore, the molar mass of Fluticasone is 446.62 g/mol.

3) Next, we calculate the percent composition of carbon in the molecule of Fluticasone by dividing the total amount of carbon in the molecule (264.235g of C) by the total mass of the molecule (446.62g of fluticasone), and then multiplying this value by 100%:

Therefore, there is 59.163% of C in the molecule of fluticasone.

Answer:

Xylitol

Please give me the brainliest if you found this helpful

Answer:

\(density = \frac{mass}{volume} \\ density = \frac{48g}{9 {cm}^{3} } \\ = 5.33 \frac{g}{ {cm}^{3} } \)

The best description of the relationship between population size, carrying capacity, and limiting factors is: "The size of a population usually stays near its carrying capacity due to limiting factors."

Carrying capacity refers to the maximum number of individuals that a particular environment can sustainably support. It represents the limit to which a population can grow given the available resources, such as food, water, and habitat. Limiting factors, on the other hand, are the factors that restrict population growth by reducing birth rates, increasing death rates, or limiting access to resources.As a population approaches its carrying capacity, limiting factors come into play and regulate the population size. These limiting factors can include competition for resources, predation, disease, availability of suitable habitat, and other environmental factors. They act as checks on population growth, preventing it from exceeding the carrying capacity of the ecosystem.

Therefore, the size of a population usually stays near its carrying capacity because the limiting factors ensure that the population does not exceed the available resources and ecological limits of the environment. If the population surpasses the carrying capacity, the limiting factors will intensify, causing a decline in resources and an increase in mortality rates, which ultimately brings the population back towards the carrying capacity.It's important to note that the relationship between population size, carrying capacity, and limiting factors is dynamic and can vary depending on various ecological and environmental factors.

for such more questions on capacity

https://brainly.com/question/29792498

#SPJ8

(I think this is correct, I hope it is, and I hope you have a nice day!)

Okay so natural gas and oil are usually found from the same location because they are formed from decayed marine life, while coal is formed from decayed animals that live on land! :D

Nitrogen G is a colorless, tasteless gas that is the most plentiful element in Earth's atmosphere and is a constituent of all living matter of nitrogen.

Nitrogen is an essential gaseous element with an atomic number of 7 and an atomic weight of 14.0067. Nitrogen gas has two particles of Nitrogen therefore, the molecular formula of this gas is N2. It is a non-metallic element that settled Group 15

nitrogen. [ nī′trə-jən ] N. A nonmetallic element that constructs up about 78 percent of the atmosphere by capacity, Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table

So we can conclude that Nitrogen is the chemical element with the symbol N and atomic number 7.

Learn more about nitrogen here: https://brainly.com/question/1380063

#SPJ1

\( \fbox{ \sf Correct \: answer \: is \: +1}\)

The given data states that the 2-D diagram is representing Lithium molecule.

few things one must know before solving the question,

Lithium is a Alkali metal having 3 electrons, out of which two electrons lies in 1S orbital (K shell) & one electron lies in 2S orbital. To attain the stability ( nobel configuration) lithium requires 7 electron which is not possible at ordinary condition & it requires a huge amount of energy instead lithium loses one electron from outermost shell.

We know that when any atom loses a electron the oxidation number is written with plus(+) symbol.

Hence net charge on lithium ion is +1

\(\small \sf Thanks \: for \: joining \: brainly \: community! \: \)

The correct answer is 25% CH4, 50% O2, 12.5% CO2, and 25% H2O by percentage composition.

According to the chemical equation, for every molecule of CH4 burned, we need two molecules of O2. So we can assume that we have 10 mL of CH4 and 40 mL of O2, which will react completely.

Using the ideal gas law, we can find the number of moles of each gas present:

n(CH4) = (0.020 L)(1.00 atm)/(0.0821 L atm/mol K)(298 K) = 0.000964 mol

n(O2) = (0.080 L)(1.00 atm)/(0.0821 L atm/mol K)(298 K) = 0.00386 mol

From the balanced equation, we see that the volume ratio of CH4 to CO2 to H2O is 1:1:2. Therefore:

n(CO2) = n(CH4) = 0.000964 mol

n(H2O) = 2n(CH4) = 0.00193 mol

The total number of moles in the mixture is:

n(total) = n(CH4) + n(O2) + n(CO2) + n(H2O) = 0.000964 + 0.00386 + 0.000964 + 0.00193 = 0.00772 mol

The percentage composition by volume of each gas is equal to the number of moles of the gas divided by the total number of moles, multiplied by 100%:

% CH4 = (0.000964 mol/0.00772 mol) x 100% = 12.5%

% O2 = (0.00386 mol/0.00772 mol) x 100% = 50%

% CO2 = (0.000964 mol/0.00772 mol) x 100% = 12.5%

% H2O = (0.00193 mol/0.00772 mol) x 100% = 25%

To know more about chemical equation visit:-

brainly.com/question/30087623

#SPJ1

Answer:

1120 gm

Explanation:

6. Consider the reaction: CzHo (g) + 02 (8) - 4 CO2(g) + 6H2O (1)

(a) Balance the equation.

(b) How many grams of oxygen are required to react with 10 moles of ethane for a complete

combustion reaction?

FIRST, CORRECT THE EQUATION THEN BALANCE

2C2H6(G) + 7O2------------>  4CO2  + 6H2O

so for 10 moles of ethane, we need

7 X 5 = 35 MOLES O2

=35 MOLES O2

O2 HAS A MOLAR MASS OF 2X16 = 32 gm

35 MOLES OF O2 HAS A MASS OF 35 X 32 =1120 gm

The number of electrons that enter the 3d subshell of an atom whose atomic number is 22​ is 2.

An atom with an atomic number of 22 is Titanium. It is a strong, lightweight metal that is resistant to corrosion and is used in a variety of applications, including aircraft, spacecraft, medical implants, and jewelry.

The 3d subshell can hold up to 10 electrons, but Titanium only has 2 electrons in the 3d subshell. This is because the 4s subshell is lower in energy than the 3d subshell, so the electrons are filled in the 4s subshell before they are filled in the 3d subshell.

Find out more on Titanium at https://brainly.com/question/20525872

#SPJ1

Answer:

the rest mass of an electron is 9.1093837915

Answer:

Fundamental properties. The invariant mass of an electron is approximately 9.109×10−31 kilograms, or 5.489×10−4 atomic mass units. On the basis of Einstein's principle of mass–energy equivalence, this mass corresponds to a rest energy of 0.511

Answer:

E. More people from African American ethnic group is affected by AIDS than other groups.

Explanation:

because it is supported by the data provided in the circle graph. The graph shows that 48% of new AIDS cases in 2000 were in the African American population, while only 31% were in the white population and 20% were in the Hispanic population. This indicates that a disproportionate number of African Americans were affected by the AIDS epidemic in 2000. While option D "Many people are still misinformed about the severity of AIDS" is a possible conclusion, but it is not directly stated or implied by the data provided in the graph.

Answer: Topical Anesthesia.

Explanation:

Topical anesthetics are used to treat ailments including small burns, insect bites, poison ivy, poison oak, poison sumac, and minor cuts and scratches that cause discomfort and irritation.

The nerve terminals in the skin are numbed by topical anesthesia. They don't render patients unconscious like general anesthetics used during surgery do. The majority of topical anesthetics are accessible over-the-counter, but your doctor may have specific recommendations for their usage and dosage given your particular medical condition.

According to the claim, Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303. (orange is 1.303 times more effused than blue).Relative rate of effusion for the orange to blue spheres = 1.531.

The process of effusion is when a gas escapes from a container through a hole that is significantly smaller in diameter than the molecules' mean free path.

Gas molecules flow through a small opening in one container and into another by effusion. Graham's law allows rates of effusion to be compared at the same temperature. Diffusion is the random molecular motion-based movement of gas molecules through one or more other types of gas.

Rate of effusion of Orange / Rate of effusion of blue

= [Mblue / Morange]^1/2

Vrms = sqrt [(3RT/M)]

Vorange / Vblue = [ Mblue / Morange]^1/2

Rate of effusion of Orange / Rate of effusion of blue

= 565/ 369

= 1.531

Thus,  Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303.

To learn more about the effusion, follow the link;

https://brainly.com/question/26882632

#SPJ1

Answer:

Neither

Explanation:

None of the answer choices is the correct definition of erosion. Erosion is actually the removal of weathered materials and particle from the surface of rocks and soils.

Erosion is a serious problem in Agriculture as it removes rich and fertile soil cover. This therefore renders the soil barren and stripped of available nutrients.

Answer:

The process of breaking down rock and soil.

Explanation:

Answer:

204.8 K

Explanation:

(P1 * V1)/T1 = (P2 * V2)/T2

"If the pressure remains constant" means

you can cancel the pressure part of the equation

T2 = (V2 * T1)/(V1)

T2 = (2.64 L * 453 K)/(5.82 L)

T2 = 204.8 K

chatgpt

A sample of xenon gas occupies a volume of 5.82 L at 453 K. If the pressure remains constant, the temperature that will make this same xenon gas sample have a volume of 2.64 L is 220K.

The combined gas law is the law of of gaseous state which is made by combination of Boyle's law, Charle's law, Avogadro's law and Gay Lussac's law.

It is a mathematical expression that relates Pressure, Volume and Temperature.

(P1 × V1)÷T1 = (P2 × V2)÷T2

We can also use the following relation-

PV = nRT

At constant pressure,

V1÷T1 = V2÷T2

This is Charles's law.

V1 = 5.82L

T1 = 453K

V2 = 2.64L

T2 = ?

T2 = 220K

Therefore, A sample of xenon gas occupies a volume of 5.82 L at 453 K. If the pressure remains constant, the temperature that will make this same xenon gas sample have a volume of 2.64 L is 220K.

Learn more about combined gas law, here:

https://brainly.com/question/30458409

#SPJ2

Answer:

The balanced molecular equation for the reaction is:

\(2HNO_{3_{(aq)} }\) + \(K_{2} CO_{3} _{(s)}\) → \(2KNO_{3} _{(s)}\) + \(H_{2} O_{(l)\) + \(CO_{2} _{(g)}\)↑

Explanation:

The weak nitric acid reacts with the strong potassium base to produce salt, water and carbon dioxide which is given off.

Molecular ratio of reactants is 2 : 1.

All phases are represented in the equation: aq for aqueous, l for liquid and g for gas (notice how they are written in subscript).

I hope this was helpful.

Pond water is poured through a paper cone Filtration, Water containing fine sand is allowed to stand for an hour Sedimentation,Hot tea turns cold due to this method Cooling.

Filtration is a process used to separate particles and substances from a mixture or solution. It is commonly used in water treatment, pharmaceutical production, and many other industrial processes. Filtration works by passing the mixture or solution through a porous material or filter medium, which traps the particles and substances while allowing the fluid or air to pass through. Depending on the type of filter used, different sized particles can be filtered out. Some of the most common filtration methods are sedimentation, screening, and centrifugal filtration. Sedimentation involves the settling of particles in a water or other liquid, usually caused by gravity. Screening utilizes a mesh or sieve to separate particles of different sizes.

Pond water is poured through a paper cone Filtration, Water containing fine sand is allowed to stand for an hour Sedimentation,Hot tea turns cold due to this method Cooling,Water used in injections is prepared by this method Distillation,Method used at home for killing germs in drinking water is Boiling.

To learn more about filtration

https://brainly.com/question/29756050

#SPJ1

In this question, we have the following reaction:

CuSO4 + Zn -> Cu + ZnSO4, as the question already says, this is a single replacement reaction

We have:

145.0 grams of Cu (Copper)

We have to find out how much Zn we had at the beginning of the reaction

First thing we need to do is find out how many moles of Copper we have, we will do it by using its molar mass, 63.55g/mol, and the given mass in the question, 145g

63.55g = 1 mol

145g = x moles

x = 2.28 moles of Copper in 145 grams

Now, according to the molar ratio, if we have 1 mol of Zn, we will produce 1 mol of Cu, therefore if we have 2.28 moles of Cu, we will have 2.28 moles of Zinc as well

Now we will find the mass of Zinc, using the number of moles, 2.28 moles and its molar mass, 65.38g/mol

65.38g = 1 mol

x grams = 2.28 moles

x = 149.1 grams of Zinc was used

Answer:

I think the answer is A

Explanation:

the temperature of solids , liquids and gases can be easily measured

Answer:

vxxbvfdb

Explanation:

Answer:

sorry dude

Explanation:

i got no clue

20 g of calcium would release the same number of valence electrons as 23 g of sodium.

The atomic number of calcium (Ca) is 20, which means it has 20 electrons in its neutral state. When calcium loses two electrons, it becomes a Ca2+ ion with 18 electrons.

On the other hand, the atomic number of sodium (Na) is 11, which means it has 11 electrons in its neutral state. When sodium loses one electron, it becomes a Na+ ion with 10 electrons.

To release the same number of valence electrons as 23 g of Na, we need to calculate how many moles of Na there are in 23 g:

Molar mass of Na = 23 g/mol

Number of moles of Na = 23 g / 23 g/mol = 1 mol

Since each Na+ ion has lost one electron, 1 mol of Na+ ions has lost 1 mol of valence electrons.

To release the same number of valence electrons as 1 mol of Na+ ions, we need to calculate how many moles of Ca2+ ions are required:

1 mol of Na+ ions = 1 mol of valence electrons

1 mol of Ca2+ ions = 2 mol of valence electrons

Therefore, we need 0.5 mol of Ca2+ ions to release the same number of valence electrons as 1 mol of Na+ ions.

Finally, we can calculate the mass of calcium that would release the same number of valence electrons as 23 g of Na:

Molar mass of Ca = 40 g/mol

Mass of Ca required = 0.5 mol x 40 g/mol = 20 g

Therefore, 20 g of calcium would release the same number of valence electrons as 23 g of sodium.

learn more about valence electrons here

https://brainly.com/question/371590

#SPJ1

Answer:

HfCl3

Explanation:

Step 1:  Find the compounds relative atomic mass

Step 2: Divide the percentage given by the relative atomic mass

Hf = 62.2/178.5         CI = 37.4/35.5

  Hf = .348                 CI = 1.054

Step 3: Divide every given number by its lowest ratio. (0.348)

Hf - .348/.348          CI - 1.054/.348

    Hf= 1                           CI = 3

This means, the empirical formula for this compound would end up being

HfCI3.

Hope this helps!

Several transfers of energy must occur to produce this electrical energy.  First, an uneven transfer of Earth's atmosphere produces solar energy. As the wind rotates the blades of a turbine, turbine. This transferred energy then turns generators inside the turbine to produce mechanical energy.

This is seen as a method that is used for generating electricity that uses solar energy. It makes use of solar panels, which are frequently placed on buildings or gathered in solar farms to speed up a process that turns solar light radiation into electricity.

Therefore, note that Mechanical energy, also known as kinetic energy or potential energy, is the energy that an object possesses when it is in motion or the energy that an object stores due to its location. Renewable energy is also fueled by mechanical energy.

Learn more about mechanical energy from

https://brainly.com/question/2856050

#SPJ1

Answer:

Several transfers of energy must occur to produce this electrical energy. First, an uneven transfer of -solar- energy to Earth's atmosphere produces wind energy. As the wind rotates the blades of a turbine, -mechanical- energy is transferred to the turbine. This transferred energy then turns generators inside the turbine to produce electrical energy.

Explanation: They use energy from the sun to create movement mechanical/kinetic energy.