How many moles are in 7.00 x 10^24 atoms of N. Watch your significant figures
11.6 moles N
12.0 moles N
11 atoms N
11.6 atoms N

Answer:

potassium oxide

Explanation:

hope this helped have a good day bye bye

Answer:

Potassium oxide

Explanation:

Looking at the Periodic table of elements-

K - Potassium - Metal

O - Oxygen - Non - Metal

Knowing that K₂O is a ionic compound. It means that they are compounds that's made of a metal and nonmetal.

The name of the metal is written first, followed by the name of the nonmetal which its will end with –ide.

Based on the following information above, we can conclude that the chemical name of K₂O is Potassium Oxide

RevyBreeze

To purpose of this experiment is 'determine how temperature affects bounce height'

Warmer ball will bounce higher than colder one

Here given data is 3 balls and height of each ball is same except  temperature

Ball A = 70˚C bounced the highest at 40cm

Ball B =  25 ˚C bounced 10cm

Ball C =  0 ˚C bounced 2cm

From the given data purpose of this experiment is to determine how temperature affects bounce height because ball A is at 70˚C means temperature is more ball bounced more at 40cm and ball B is at 25 ˚C  bounced at 10 cm and ball C is at 0 ˚C temperature at 2cm means at low temperature ball bounced low and if temperature is high then ball  bounced at high

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Oxygen is a nonpolar molecule, meaning it does not have a significant separation of positive and negative charges. Consequently, oxygen will have the greatest solubility in a solvent that is also nonpolar. Option(c) completely nonpolar.

Oxygen molecules can interact with nonpolar solvents through London dispersion forces, which are weak intermolecular forces that arise from temporary fluctuations in electron distribution.

A nonpolar molecule is one in which the distribution of electrons is symmetrical, resulting in no significant separation of positive and negative charges. This leads to a lack of dipole moment and makes the molecule unreactive with polar substances.

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Answer:

True

Explanation:

Answer:

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Explanation:

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Answer:

Fossil fuel

Explanation:

Answer:

2

Explanation:

Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy. Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs.

A conjugate acid-base pair is the pair of two compounds which differ by the presence of a proton. An acid will donate protons to a base and become a conjugate base. A base will accept protons and become a conjugate acid.Conjugate acid/base pairs are as follows:H2PO4− and HPO42−H2CO3 and CO32−HCl and Cl−H3O+ and OH−Explanation:

H2PO4− and HPO42−H2PO4− can donate a proton to become HPO42− and the latter can accept a proton to become H2PO4−.H2CO3 and CO32−H2CO3 can donate a proton to become CO32− and the latter can accept a proton to become H2CO3.HCl and Cl−HCl can donate a proton to become Cl− and the latter can accept a proton to become HCl.H3O+ and OH−H3O+ can donate a proton to become OH− and the latter can accept a proton to become H3O+.Therefore, the following are conjugate acid/base pairs:H2PO4− and HPO42−H2CO3 and CO32−HCl and Cl−H3O+ and OH−

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Answer:

OH NO

Explanation:

Just try you best to that's what I do!

Answer: i no rite i dont ether

Explanation:

The current would need to be applied for approximately 0.71 hours (or 42.6 minutes) to plate out 4.90 g of nickel.

To determine how long the current must be applied to plate out a certain amount of nickel, we need to use Faraday's laws of electrolysis, which relate the amount of material deposited on an electrode during electrolysis to the amount of electric charge passed through the solution.

The first step is to calculate the amount of electric charge that would be passed through the solution during the plating of 4.90 g of nickel. We can do this using the following equation:

Q = nF

where Q is the amount of electric charge (in coulombs), n is the number of moles of nickel being plated out, and F is Faraday's constant (96485 coulombs per mole of electrons).

The number of moles of nickel being plated out can be calculated from its molar mass:

molar mass of nickel = 58.69 g/mol

moles of nickel = 4.90 g / 58.69 g/mol = 0.0834 mol

Substituting into the equation above, we get:

Q = 0.0834 mol × 96485 C/mol = 8040 C

The next step is to use the current to determine the time required to pass this amount of electric charge. We can use the following equation:

Q = It

where I is the current (in amperes), t is the time (in seconds), and Q is the amount of electric charge (in coulombs).

To convert hours to seconds, we multiply by 3600:

t = Q / I = 8040 C / 3.16 A = 2544 s = 2544/3600 hours

Therefore, by calculating we can say that the current would need to be applied for approximately 0.71 hours (or 42.6 minutes) to plate out 4.90 g of nickel.

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Answer:

24.66%

Explanation:

To find the percent of water (H2O) in the following compound: Zn3(PO4)2. 7H2O

The atomic mass of the elements are as follows:

Zn = 65g/mol

P = 31g/mol

O = 16g/mol

H = 1g/mol

Hence, molar mass of the compound is as follows:

65(3) + {31 + 16(4)} 2 + 7{1(2) + 16}

195 + 95(2) + 7(18)

195 + 190 + 126

511g/mol

Molar mass of 7H2O

= 7(18)

= 126g/mol

Hence, the percent of H2O in the compound is:

Molar Mass of 7H2O/molar mass of compound × 100

= 126/511 × 100

= 0.2466 × 100

= 24.66%

Answer:

C

Explanation:

Answer:

2 in each

Explanation:

Answer:Calor y temperatura son dos conceptos diferentes pero estrechamente relacionados. Observa que tienen diferentes unidades: la temperatura típicamente tiene unidades de grados Celsius (^\circ\text C  

∘

Cdegrees, start text, C, end text) o Kelvin (\text KKstart text, K, end text), y el calor tiene unidades de energía, joules (\text JJstart text, J, end text). La temperatura es una medida de la energía cinética promedio de los átomos o moléculas en el sistema. Las moléculas de agua en una taza de café caliente tienen una mayor energía cinética promedio que las moléculas de agua en una taza de té helado, lo que también significa que están moviéndose a una velocidad más alta. La temperatura también es una propiedad intensiva. Esto significa que no depende de qué tanta cantidad tengas de una sustancia (¡siempre y cuando esté toda a la misma temperatura!). Por esta razón, los químicos pueden utilizar el punto de fusión para poder identificar una sustancia pura: la temperatura a la cual se derrite es una propiedad de la sustancia que no depende de la masa de una muestra.

A nivel atómico, las moléculas en cada objeto están constantemente en movimiento y chocando entre sí. Cada vez que chocan, pueden transferir energía cinética. Cuando dos sistemas están en contacto, se va a transferir calor del sistema más caliente al más frío por medio de choques moleculares. La energía térmica va a fluir en esa dirección hasta que los dos objetos están a la misma temperatura. Cuando esto ocurre, decimos que están en equilibrio térmico.

Explanation:

Al calor a veces se le llama una magnitud de proceso, porque está definido en el contexto de un proceso por el cual se puede transferir energía. No decimos que una taza de café contiene calor, pero podemos hablar del calor transferido de la taza de café caliente a tu mano. El calor también es una propiedad extensiva, así que el cambio de temperatura que resulta al transferir calor a un sistema depende de cuántas moléculas hay en el sistema.

The specific gravity of urine is a measure of the concentration of dissolved particles in the urine. These particles include salts, minerals, and waste products, among others. The specific gravity of urine varies depending on factors such as fluid intake, diet, and health status.

When fluid intake is normal, the specific gravity of urine should be between 1.010 and 1.025. This range reflects a healthy balance of hydration and waste elimination. If the specific gravity is lower than 1.010, it may indicate that the person is overhydrated or has a condition that affects the kidneys' ability to concentrate urine. On the other hand, if the specific gravity is higher than 1.025, it may indicate dehydration, a high-protein diet, or a condition that affects the kidneys' ability to dilute urine.

It is important to note that specific gravity measurements are not definitive and should be interpreted in conjunction with other clinical data. For example, if a person has a high specific gravity but no symptoms of dehydration, further tests may be needed to determine the cause. Similarly, a person with a low specific gravity may need additional tests to rule out kidney disease or other conditions.

In conclusion, when fluid intake is normal, the specific gravity of urine should be between 1.010 and 1.025. However, specific gravity measurements should be interpreted in the context of other clinical data to accurately assess a person's health status.

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Answer:

Chemical energy

Explanation:

Chemical Energy

Changes in a gas-phase exothermic reaction affect the value of the equilibrium constant. These changes include removal of a reactant, removal of a product, decrease in volume, decrease in temperature, and addition of a catalyst.

The effects of these changes on the value of the equilibrium constant are given below:

1. Removal of a reactant: If a reactant is removed from a gas-phase exothermic reaction, then the equilibrium constant will decrease. The decrease in reactant concentration causes the reaction to shift in the forward direction to replace the missing reactant.

2. Removal of a product: If a product is removed from a gas-phase exothermic reaction, then the equilibrium constant will increase.

The decrease in product concentration causes the reaction to shift in the reverse direction to replace the missing product.

3. Decrease in volume: If the volume of the container holding the gas-phase exothermic reaction is decreased, then the equilibrium constant will increase. This is because the decrease in volume increases the pressure of the system, causing the reaction to shift in the direction with fewer gas moles.

4. Decrease in temperature: If the temperature of a gas-phase exothermic reaction is decreased, then the equilibrium constant will increase. The decrease in temperature causes the reaction to shift in the exothermic direction to produce more heat.

5. Addition of a catalyst: The addition of a catalyst to a gas-phase exothermic reaction has no effect on the equilibrium constant.

A catalyst increases the rate of the forward and reverse reactions equally, but it does not change the position of the equilibrium. Therefore, it does not affect the value of the equilibrium constant.

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At 20°C, caesium will exist as a solid due to its melting point being higher than the given temperature.

Caesium (Cs) is an alkali metal with a melting point of 28.5°C and a boiling point of 671°C. At 20°C, which is below its melting point but significantly higher than room temperature, caesium will exist in a solid state.

The state of a substance at a given temperature is determined by its melting and boiling points. If the temperature is below the melting point, the substance will be in a solid state. In the case of caesium, its melting point is higher than 20°C, indicating that it will remain in the solid state at this temperature.

Caesium is a soft, silvery-white metal that is highly reactive and has a low melting point compared to other metals. At room temperature, it is already a solid. Since 20°C is lower than its melting point, there would be no significant change in the state of caesium. It will still be in its solid form.

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Answer:

D

Explanation:

The picture depicts the data of the chemical, explaining that as the temperature rises, the chemical reaction rate would increase as well.

Answer: 22.5 percent of incoming solar radiation goes directly to the surface of the Earth and is absorbed.

Explanation: Transfer of radiation through a planet's atmosphere. A planet and its atmosphere, in our solar system, can radiate back to space only as much energy as it absorbs from incoming solar radiation.

Answer:

Explanation:

I have the notes

"Only about 40 percent actually reaches the surface of the earth"

"our atmosphere and clouds reflect bout 40 percent of incoming solar radiation back into outer space"

"The remaining 60 percent is responsible for warming the earth"

"About 20 percent of this radiation is absorbed directly by the atmosphere"

The mass percent of the sodium fluoride solution is approximately 29.8%.

Given:

Moles of sodium fluoride (NaF) = 0.64 mol

Mass of water (\(H_2O\)) = 63.5 g

To find the mass of sodium fluoride, we can use its molar mass, which is 41.99 g/mol (sodium = 22.99 g/mol, fluorine = 18.99 g/mol):

Mass of NaF = Moles of NaF * Molar mass of NaF

\(= 0.64 mol * 41.99 g/mol \\= 26.91 g\)

The total mass of the solution is the sum of the mass of sodium fluoride and the mass of water:

The total mass of solution = Mass of NaF + Mass of \(H_2O\)

\(= 26.91 g + 63.5 g \\= 90.41 g\)

Now we can calculate the mass percent:

Mass percent = (Mass of NaF / Total mass of solution) * 100

\(= (26.91 g / 90.41 g) * 100 \\= 29.8%\)

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Answer:

option c

Explanation:

ffuunkie. tfnhc dhrhrjebrjeieie

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 63.5 g

volume = 11.6 cm³

The density is

\(density = \frac{63.5}{11.6} \\ = 5.4741379310...\)

We have the final answer as

5.474 cm³

Hope this helps you

Answer:

"Hydrogen is still available outside the core, so hydrogen fusion continues in a shell surrounding the core. The increasingly hot core also pushes the outer layers of the star outward, causing them to expand and cool, transforming the star into a red giant."

250 kJ of energy are removed from a 4.00 x 102 g sample of water at 60˚C. Will the sample of water completely freeze: Yes, because there is enough energy.

250 kJ of energy are removed from a 4.00 x 102 g sample of water at 60˚C. Will the sample of water completely freeze: Yes, because there is enough energy.

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The elements of Group 1 of the periodic table are kept in the table given below. Group 1, also known as the alkali metals. The difference in reactivity between top and bottom of periodic table is the reactivity increases as you move down the group. This is due to the outermost electron configuration of these elements.

The elements of Group 1 of the periodic table are kept in the table given below. Group 1, also known as the alkali metals, includes elements such as lithium (Li), sodium (Na), potassium (K), and so on. These elements exhibit similar chemical properties, which is why they are grouped together.

When observing the reactivity of alkali metals from the top of the group to the bottom, a significant difference can be observed. The reactivity increases as you move down the group. This is due to the outermost electron configuration of these elements.

Alkali metals have one electron in their outermost energy level, which is easily lost to form a positive ion. As you move down the group, the atomic radius increases, and the outermost electron is further from the nucleus. This leads to a decrease in the attractive force between the nucleus and the electron, making it easier for the outer electron to be lost. Hence, the reactivity increases from top to bottom in Group 1 of the periodic table.

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The percent of CaCO3 in the sample = mass of CaCO3 / mass of the sample. The average value is calculated by adding the values from two trails and dividing it by two.

What is Molar mass?

In chemistry, the molar mass of a compound is defined as the mass of a sample of that compound divided by the amount of substance, which is the number of moles in that sample, and is measured in moles. Molecules, properties of matter. Molar mass is the average of many instances of a compound, which often differ in mass due to the presence of isotopes. Most commonly, molar mass is calculated from standard atomic masses, so it is a global average and a function of the relative isotopic abundances of constituent atoms on Earth. Molar mass is useful for converting between the mass of a substance and the quantity of a bulk substance.

Molecular weight and formula mass are commonly used synonyms for molecular weight, especially for molecular compounds. However, most authoritative sources define it differently. The difference is that molecular weight is the mass of a particular particle or molecule whereas molar mass is the average of many particles or molecules.

Therefore, The percent of CaCO3 in the sample = mass of CaCO3 / mass of the sample. The average value is calculated by adding the values from two trails and dividing it by two.

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The wind tends to flow parallel to the isobars above the friction level due to the balance between the pressure gradient force and the Coriolis force.

The pressure gradient force is responsible for the wind's movement from areas of high pressure to areas of low pressure. Isobars are lines connecting points of equal pressure on a weather map. The closer the isobars are to each other, the steeper the pressure gradient and the stronger the pressure gradient force.

The Coriolis force is an apparent force resulting from the Earth's rotation. It deflects the wind to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. The Coriolis force increases with increasing wind speed.

Above the friction level, where the influence of surface roughness is minimal, the pressure gradient force and the Coriolis force are the primary factors determining wind direction. The wind tends to flow parallel to the isobars because the pressure gradient force is balanced by the Coriolis force. This balance results in a geostrophic wind flow, which is characterized by winds moving parallel to the isobars at a constant speed.

In conclusion, above the friction level, the wind flows parallel to the isobars due to the balance between the pressure gradient force and the Coriolis force. This geostrophic wind flow pattern is observed in the upper levels of the atmosphere where the influence of surface friction is minimal.

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