how many atoms does 2NaOH have

Answer:

Look up at the atom on the periodic table of elements and find out what its atomic mass is. Subtract the number of protons from the atomic mass. This is the number of neutrons that the regular version of the atom has. If the number of neutrons in the given atom is different, than it is an isotope.

Answer:

A periodic table is a tabular array of chemical display, arranged based on atomic number, into groups the coloumns and periods rows.

Answer:

periodic table, in full periodic table of the elements, in chemistry, the organized array of all the chemical elements in order of increasing atomic number—i.e., the total number of protons in the atomic nucleus. When the chemical elements are thus arranged, there is a recurring pattern called the “periodic law” in their properties, in which elements in the same column (group) have similar properties. The initial discovery, which was made by Dmitry I. Mendeleyev in the mid-19th century, has been of inestimable value in the development of chemistry.

A mixture of cis- and trans-3-methyl-2-hexene is hydroxylated, as shown in the diagram below. The most common definition of hydroxylation in chemistry is a chemical process.

A hydroxyl group is added to an organic molecule as a result (OH).The degree of hydroxylation refers to how many OH groups are present in a given molecule (ii). the process of hydroxylation. A hydrocarbon utilised in organic chemistry is hexene, which has the chemical formula C6H12. A chemical with two carbon atoms joined by a double bond is known as an alkene, and the prefix "-ene" denotes its presence. The word "hex" comes from the fact that the molecule has six carbon atoms in it.

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To determine how many moles of O2 can be produced by letting 12 mol of KClO3 react in the given equation, we first need to use stoichiometry. Stoichiometry is the study of the quantitative relationships between reactants and products in a chemical reaction. The coefficients in the balanced chemical equation tell us the mole ratios of the reactants and products.

From the balanced equation, we can see that for every 2 moles of KClO3 that react, 3 moles of O2 are produced. This means that the mole ratio of KClO3 to O2 is 2:3. To find out how many moles of O2 can be produced from 12 mol of KClO3, we can set up a proportion:
2 mol KClO3 / 3 mol O2 = 12 mol KClO3 / x mol O2
Solving for x, we get:
x = (3 mol O2 * 12 mol KClO3) / 2 mol KClO3
x = 18 mol O2
Therefore, 12 mol of KClO3 can produce 18 mol of O2 in the given equation.

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pH is a measure of the acidity or basicity of a solution. It is defined as the negative logarithm of the concentration of hydrogen ions (H+) in a solution.

A solution with a pH of 7 is considered neutral, while solutions with a pH below 7 are considered acidic and those above 7 are considered basic or alkaline. The pH scale is logarithmic, meaning that a change of one pH unit represents a tenfold change in the concentration of H+. The pH of a solution can be measured using a pH meter or indicator paper, and it is an important parameter in various chemical and biological processes, such as enzyme activity, drug solubility, and nutrient uptake by plants.

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Answer:

well person with a question it would be 356 an atom for eveyday of the year but every four years it would be 366 atoms

Explanation:

Answer:

b

Explanation:

Answer:

D. the quantity of heat that is required to raise 1 g of the sample by 1°C (or Kelvin) at a given pressure

Explanation:

CBr₄ has a higher vapor pressure at the same temperature than CCl₄. The statement is False.

The vapor pressure of a liquid is the pressure exerted by the vapor of the liquid in equilibrium with the liquid. The vapor pressure of a liquid depends on the strength of the intermolecular forces in the liquid. The stronger the intermolecular forces, the lower the vapor pressure.

In the case of CCl₄ and CBr₄, the intermolecular forces are London dispersion forces. The size of the atom or molecule affects the strength of the London dispersion forces. The larger the atom or molecule, the stronger the London dispersion forces.

Bromine is larger than chlorine, so the intermolecular forces in CBr₄ are stronger than the intermolecular forces in CCl₄. Therefore, CCl₄ will have a higher vapor pressure than CBr₄ at the same temperature.

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the climate sensitivity parameter represents how much the Earth's temperature will change in response to changes in greenhouse gas concentrations. It is calculated using the ratio of the change in temperature to the change in radiative forcing in the energy balance model.

The climate sensitivity parameter is a measure of how much the Earth's surface temperature will increase in response to a doubling of atmospheric carbon dioxide (CO2) concentration. It quantifies the sensitivity of the climate system to changes in greenhouse gases.

In the energy balance model, the climate sensitivity parameter (λ) is mathematically expressed as the change in global surface temperature (ΔT) divided by the radiative forcing (ΔF). Radiative forcing refers to the change in the Earth's energy balance caused by external factors like greenhouse gas emissions. The equation for climate sensitivity parameter is:

λ = ΔT / ΔF

This equation shows that the climate sensitivity parameter is the ratio of the change in global surface temperature to the change in radiative forcing. A higher value of λ indicates a greater sensitivity of the climate system to changes in greenhouse gases, implying larger temperature increases for a given increase in radiative forcing.

For example, if the climate sensitivity parameter is 3 °C per W/m2, it means that for every additional watt of radiative forcing, the global surface temperature will increase by an average of 3 degrees Celsius.
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Answer:

They will form a hydrogen bond with the oxygen atom and the polar hydrogen atom.

Between a water molecule and an ethanol molecule, a hydrogen bond can occur between a lone pair of electrons on the Oxygen and  a Hydrogen in water and the Polar hydrogen of an ethanol molecule.

Hydrogen bonding is an interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons.

It is a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces.

In the given question, They will form a hydrogen bond with the oxygen atom and the polar hydrogen atom.

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Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual density = 7.80 g/cm³

error = 7.30 - 7.80 = 0.5

We have

\(p(\%) = \frac{0.5}{7.8} \times 100 \\ = 6.410256...\)

We have the final answer as

Hope this helps you

Sc-42 is unstable because it has an imbalance of protons and neutrons in its nucleus.

Scandium-42 (Sc-42) is unstable because it falls outside the zone of stability in terms of the ratio of protons to neutrons in its nucleus. Stable nuclei typically have a balanced ratio of protons to neutrons. In the case of Sc-42, it has 21 protons and 21 neutrons. While this may seem balanced, it is important to consider the nuclear binding forces. In larger nuclei, such as Sc-42, the strong nuclear force that binds protons and neutrons together becomes less effective, resulting in a weaker nuclear stability. As a result, Sc-42 is prone to nuclear decay, such as beta decay, in order to achieve a more stable configuration by adjusting the proton-neutron ratio.

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Answer:

C

Explanation:

I would say different points of view and listening to an argument. The local news just to "stay up to date" won't teach you much.

Answer:

b

Explanation:

all of them shows different point of veiws. none of them are biest

Answer:

1. Metal.

2. Atom.

3. Homogeneous

4. Compounds.

5. Lustrous

6. Saturated.

7. Colloidal; true.

8. Homogeneous.

Explanation:

1. An element which are sonorous are called metal.

2. An element is made up of only one kind of atom.

3. Alloys are homogeneous mixtures.

4. Elements chemically combines in fixed proportion to form compounds.

5. Metals are lustrous and can be polished.

6. A solution in which no more solute can be dissolved is called a saturated solution.

7. Milk is a colloidal solution but vinegar is a true solution.

8. A solution is a homogeneous mixture.

Answer: they are the same because they both convert and deal with thermal energy because it’s not created or destroyed

Explanation:

Answer:

Explanation:

What does it mean by are represented by is it like cells when things can a cell molecule?

Answer:

Substances can change phase—often because of a temperature change. At low temperatures, most substances are solid; as the temperature increases, they become liquid; at higher temperatures still, they become gaseous.

The process of a solid becoming a liquid is called melting. (an older term that you may see sometimes is fusion). The opposite process, a liquid becoming a solid, is called solidification. For any pure substance, the temperature at which melting occurs—known as the melting point—is a characteristic of that substance. It requires energy for a solid to melt into a liquid. Every pure substance has a certain amount of energy it needs to change from a solid to a liquid. This amount is called the enthalpy of fusion (or heat of fusion) of the substance, represented as ΔHfus. Some ΔHfus values are listed in Table 10.2 “Enthalpies of Fusion for Various Substances”; it is assumed that these values are for the melting point of the substance. Note that the unit of ΔHfus is kilojoules per mole, so we need to know the quantity of material to know how much energy is involved. The ΔHfus is always tabulated as a positive number. However, it can be used for both the melting and the solidification processes as long as you keep in mind that melting is always endothermic (so ΔH will be positive), while solidification is always exothermic (so ΔH will be negative).

The calculator answer obtained from multiplying the measurements 36.0 and 17.12 is 616.32. This answer is correct.

To double check, we can use the formula for multiplying two numbers:

Multiplication = A * B

Where A is the first number and B is the second number.

In this case, A = 36.0 and B = 17.12.

Plugging these values into the formula, we get:

Multiplication = 36.0 * 17.12

Multiplication = 616.32

So the calculator answer is correct.

It is important to double check calculator answers to ensure that there are no mistakes or typos. This helps to ensure that the final answer is accurate and reliable.

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The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.

...

Liquids Solids and Gases:

NON OF THESE

Answer:

Answer: A. 3 mol  3 mol Al:

Explanation:

Te given balanced chemical equation is :

According to the stochiometry :

A: 3 mol  3 mol Al:

3 moles of chlorine reacts with 2 moles of aluminium

B. 2 mol  3 mol :

2 moles of aluminium  reacts with 3 moles of chlorine

C.  2 mol  2 mol Al

2 mol of aluminium produces 2 mol of  

D. 3 mol  2 mol  

3 moles of chlorine produces with 2 moles of  

Thus the conversion factor not used for mole to mole calculations is  3 mol  3 mol Al:

Explanation:

Answer:

Part 1 calcium and strontium have same properties as magnesium because all three are in same group.

Part 2 As atomic number of potassium is 19 so it contains 19 protons and 19 electrons because it is neutral

Potassium has 20 neutrons because its mass is 39

We can find neutron = atomic mass - atomic number

Explanation:

In the highest occupied molecular orbital, E = 5.72 x 10⁻¹⁸ J and the probability that the electron is located in the region 0 < x < L/2 and 0 < y < L/2 is 1/4.

The energy of a particle in a two-dimensional box is given by:
E = (h²/8mL²)(n²x + n²y) Where h is the Planck constant, m is the mass of the electron, L is the length of the box, and nx and ny are the quantum numbers.

The highest occupied molecular orbital (HOMO) corresponds to the highest energy level, which is given by the maximum value of nx and ny. Since there are 26 π electrons, the HOMO corresponds to the 13th energy level. The quantum numbers for this level are nx = 4 and ny = 3, or vice versa.  Therefore, the energy of an electron in the HOMO is:

E = (h²/8mL²)(4² + 3²) = (h²/8mL²)(25)
Substituting the values of h, m, and L, we obtain:
E = (6.626 x 10⁻³⁴ J.s)²/(8 x 9.11 x 10⁻³¹ kg x (1 x 10⁻⁹ m)²) x 25
E = 5.72 x 10⁻¹⁸ J

The probability that the electron is located in the region 0 < x < L/2 and 0 < y < L/2 is given by the square of the wave function integrated over this region:
P = ∫∫|Ψ(x,y)|²dxdy

The wave function for a particle in a two-dimensional box is given by:
Ψ(x,y) = (2/L) sin(nxπx/L) sin(nyπy/L) Substituting the values of nx and ny for the HOMO, and the value of L, we obtain:
Ψ(x,y) = (2/1 x 10⁻⁹ m) sin(4πx/1 x 10⁻⁹ m) sin(3πy/1 x 10⁻⁹ m)

Therefore, the probability is:
P = ∫₀^(L/2)∫₀^(L/2)|(2/1 x 10⁻⁹ m) sin(4πx/1 x 10⁻⁹ m) sin(3πy/1 x 10⁻⁹ m)|²dxdy
P = (4/1 x 10⁻¹⁸ m²) ∫₀^(L/2)∫₀^(L/2) sin²(4πx/1 x 10⁻⁹ m) sin²(3πy/1 x 10⁻⁹ m) dxdy

Using the double angle formula for sine, we can rewrite the integrand as:
P = (4/1 x 10⁻¹⁸ m²) ∫₀^(L/2)∫₀^(L/2) (1 - cos(8πx/1 x 10⁻⁹ m))/2 (1 - cos(6πy/1 x 10⁻⁹ m))/2 dxdy
Integrating and substituting the limits of integration, we obtain:
P = (4/1 x 10⁻¹⁸ m²) (L/2)²/4 = 1/4

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Answer:

1. Hyphothesis 2.Theory 3. law

Explanation:

not sure, but law is observation, theory is based on knowledge things before.

Answer: it’s false

Explanation: In chemical changes the amount of particular substances may change but the total amount of materials does not. In chemical changes as in physical changes matter cannot disappear nor appear from nowhere. It can only react to form something else

Answer:

Ionic compound

Explanation:

Lithium gives away an electron and Bromine takes an electron

Hope this helps! :)

The composition and growth method, which enable the development of BCN films predominating between insulating BN and semimetallic graphite, determine the properties of BCN thin films. The influence of synthesis settings on various BCN characteristics are investigated in this regard.

Van der Waals bonds, of which hydrogen bonding is an example, are crucial to the characteristics of water and to how it behaves in biology. Dipole-dipole interactions with bonds between hydrogen and other atoms are thought to be the cause.

Both inorganic materials like water and biological compounds like DNA and proteins include hydrogen bonding. Van der Waals attractions, which depend on tiny variations in the electron concentrations, can happen between any two or more molecules.

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Answer:

5 dollars per unit

Explanation:

When there is an unexpected legal impediment, the company decides to change the name of the product so this one that has a cost of $5 per When there is an unexpected legal impediment, the company decides to change the name of the product so this one that has a cost of $5 per unit is going to have a much higher cost than originally calculated.  This is because you will have to pay a designer or a marketing company to establish the new name of the product, which will generate expenses in the new advertising and product launch.

If it had not changed its decision, it would have to face a fine and withdrawal of the product by the FDA and a lawsuit for the possible damages caused to the other company that has a product with the same name.  This generates a greater loss than the option of changing the name because it is not only an economic cost but also a cost in the image of the company that can cause a deterioration in the confidence of its customers, causing sales to fall.

Answer:

In equation form, Newton's second law of motion is a=Fnetm a = F net m . This is often written in the more familiar form: Fnet = ma. The weight w of an object is defined as the force of gravity acting on an object of mass m. ... Friction is a force that opposes the motion past each other of objects that are touching.

F = ma, or force equals mass times acceleration, is Newton's second law of motion.

According to the first law, an object's motion will not change unless a force acts on it.

According to the second law, the force acting on an object is equal to its mass multiplied by its acceleration.

When two objects interact, they apply forces of equal magnitude and opposite direction to each other, according to the third law.

His second law states that a force is defined as the change in momentum divided by the change in time. Newton's second law of motion is F = ma, or force equals mass times acceleration.

F → A B = − F → B A. The conservation of momentum is associated with Newton's third law of motion.

Every action must have an equal and opposite reaction, according to the law.

Thus, this is the equation for Newton's second law of motion.

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Answer:

the 3rd one

Explanation:

The substance 3 will represent an element.

Element is defined as a pure substance made up of only one sort of atom with the same number of protons in its nucleus.

It can also be defined as a material that cannot be broken down into another material.

There are basically three types of elements.

A substance is a stuff with a distinct makeup and qualities. It is any pure element or pure compound.

A pure substance's properties/composition are fixed.

A chemical substance is a type of matter with a consistent chemical makeup and behavior.

Thus, the substance 3 will represent an element.

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