what special equipment did niels bohr use to develop his atomic model?

The correct statement about Dunite is that it is formed when magma cooled slowly below the ground; Option B.

Rocks are large aggregates of minerals that occur in the earth's crusts as a result of the cooling ad solidification of molten magma or the deposition of the remains of dead organic matter which changes from pressure ad heat.

There are three types of rocks, and they are:

Learn more about igneous rocks at: https://brainly.com/question/18297174

#SPJ1

When an element undergoes positron emission, the mass number remains the same, but the atomic number decreases by one unit.

Positron emission, also known as beta-plus decay, occurs when an unstable nucleus emits a positron (a positively charged electron). In this process, one of the protons in the nucleus is converted into a neutron, reducing the atomic number by one. The mass number, which represents the total number of protons and neutrons in the nucleus, remains unchanged because the total number of particles (protons + neutrons) is conserved.

The emission of a positron balances the charge in the nucleus since a proton (positive charge) is converted into a neutron (neutral charge) and a positron (positive charge) is emitted. This decay process occurs in certain radionuclides to achieve a more stable nuclear configuration.

To learn more about positron emission click here: brainly.com/question/4598666

#SPJ11

Among the given options, the ion that is unlikely to form a colored coordination complex in an octahedral ligand environment is d. Ag+ (silver ion).

Color in coordination complexes arises from the absorption of certain wavelengths of light due to electronic transitions within the metal's d orbitals. Transition metal ions, such as Sc3+, Fe2+, Co3+, and Cr3+, typically have partially filled d orbitals and can exhibit a wide range of colors when forming coordination complexes.

However, Ag+ is a d^10 ion, meaning its d orbitals are fully filled. As a result, it does not have any available d electrons for electronic transitions that can absorb visible light and produce color. Therefore, Ag+ ions are generally not involved in the formation of colored coordination complexes in an octahedral ligand environment.

It's worth noting that while Ag+ does not usually form colored complexes in an octahedral environment, it can form colored complexes in different ligand environments, such as linear or tetrahedral, where the electronic transitions may be allowed.

Learn more about coordination complexes and the factors influencing their colors here:

https://brainly.com/question/25792306?referrer=searchResults

#SPJ11

Answer:

Explanation:

conversion factor is used to make sure that all the units cancels with the other units and we only remain with the mass of Ag I which is 51.2g but since the number of moles can be calculated by dividing with the relative molecular mass therefore 51.2g/234.7gmol=0.22mol

There are 680,000 microliters in 0.68 liters.

Answer:

665

Explanatio

Answer:

$665

Explanation:

5 hours per week × $7 per hour = $35 per week

$35 per week × 19 weeks = $665

When we talk about an adiabatic system, it is a system where no heat can transfer between the system and its surroundings. An adiabatic system is thermally insulated so that no heat is exchanged between the system and its surroundings.

A good example of an adiabatic system is a thermos that can keep hot drinks hot and cold drinks cold for a long time. Considering just two components "your body and the insulation" and running up and down through the U. campus in freezing weather, we can draw the system boundary for an adiabatic system as follows:

First, we have to identify the system, which is the region of space and matter we're interested in. In this case, the system is made up of two components: your body and the insulation. So, the system boundary can be drawn around your body and insulation, which is the region of space that contains these two components. The system boundary should be drawn such that it encloses the entire system and separates it from the surroundings. The system boundary should be made adiabatic, which means it should be thermally insulated so that no heat can enter or leave the system.

In this case, the fancy gear that lets sweat evaporate but keeps you almost completely insulated can act as the adiabatic boundary. This means that the system boundary should be drawn around your body and the insulation provided by the fancy gear so that no heat can transfer between the system and its surroundings. This would ensure that the system is an adiabatic system.

To know more about adiabatic visit :

https://brainly.com/question/13002309

#SPJ11

To determine how long it will take until both have the same activity, please provide additional information about the two objects or substances being compared.

This could include their initial activity levels, decay rates, or half-lives. Once this information is provided, I can help you calculate the time it takes for both to have the same activity.

The time it takes for them to equalize depends on factors like initial conditions, rates of change, and the specific mathematical models governing the activities.

Without additional details, it is difficult to provide a precise answer.

It is recommended to provide more specific information to estimate the time required for the activities to reach equilibrium.

Read more about Activity.

https://brainly.com/question/32151932

#SPJ11

The correct answer is (a) A precipitate will form because of P > Ksp.

The ion product (IP) is calculated by multiplying the concentrations of the ions involved in the precipitation reaction, raised to the power of their respective stoichiometric coefficients. For the reaction: AgCl(s) ↔ Ag+(aq) + Cl-(aq) , Ionic product can be determined by:

Step 1: Determine the concentrations of the ions after mixing.
[Cl-] = (1.5×10−3 M)(250 mL) / (250 mL + 250 mL) = 7.5×10−4 M
[Ag+] = (2.0×10−7 M)(250 mL) / (250 mL + 250 mL) = 1.0×10−7 M

Step 2: Calculate the reaction quotient (Q) using the ion concentrations.
Q = [Ag+][Cl-] = (1.0×10−7 M)(7.5×10−4 M) = 7.5×10−11

Step 3: Compare Q to Ksp.
If IP > Ksp, a precipitate will form because the ion product exceeds the solubility product, indicating that the solution is supersaturated and the excess ions will form a solid precipitate.

If IP = Ksp, the solution is saturated and at equilibrium, and no precipitate will form.

If IP < Ksp, the solution is unsaturated and no precipitate will form.

Since Q > Ksp (7.5×10−11 > 1.8×10−10), a precipitate will form because P > Ksp.

To know more about Ionic Product:

https://brainly.com/question/31326174

#SPJ11

Answer:

24 hours of thawing it out in the fridge for every 5 pounds

Explanation:

Answer:

Increases by 100 Pa

Explanation:

According to The Ideal Gas Equation,

The balanced nuclear equation for the given reaction is: \(\[\ce{K - > [e^-] Ca}\]\). The potassium atom undergoes beta decay, transforming into a calcium atom by emitting an electron (beta particle).

The balanced nuclear equation for the given reaction is:

\(\[\ce{K - > [e^-] Ca}\]\)

In the given nuclear reaction, the potassium atom undergoes beta decay, where a neutron changes into a proton and an electron (beta particle) is emitted. This results in the formation of a calcium atom. To balance the equation, an electron is added on the right-hand side to ensure the atomic numbers of both elements are equal. Therefore, the balanced nuclear equation is:

\(\[\ce{K - > [e^-] Ca}\]\)

Learn more about potassium

https://brainly.com/question/13321031

#SPJ11

metal ore

i got this question before and answered this one correctly trust me its right

Answer:

metal ore

Explanation:

It takes the Moon approximately 27.3 days to orbit the Earth, and It takes the flag approximately 4 seconds to rotate once in a full circle.

Analyzing the two time intervals, it is clear that the Moon's orbit of the Earth is much longer than the time it takes the flag to rotate in a full circle. This is because the Moon is much farther away from the Earth than the flag is from the ground, so it requires much more time for the Moon to complete one full orbit around the Earth.

The Moon's orbit of the Earth is much longer than the time it takes the flag to rotate in a full circle because the Moon is much farther away from the Earth than the flag is from the ground. This is due to the difference in the gravitational forces that affect the Moon and the flag. The Moon is subject to the gravitational pull of the Earth, which causes it to orbit around the Earth.

Learn more about The Moon's orbit of the Earth:

https://brainly.com/question/11792856

#SPJ4

Answer:

you would more than likely have hot coca.  

Explanation:

Because when its cold out you don't want something cold, its common sense  lol.

The even though there are two cubic meters of copper, the one cubic meter of gold has the greater mass.

To determine which has the greatest mass between one cubic meter of gold and two cubic meters of copper, we need to compare their densities, as density is the ratio of mass to volume .

Density of gold :The density of gold is 19.3 g/cm³, so we can convert cubic meters to cubic centimeters and multiply by the density to get the mass of one cubic meter of gold: Density of gold = 19.3 g/cm³1 cubic meter = 1000000 cubic centimeters19.3 g/cm³ x 1000000 cubic centimeters = 19300000 grams or 19300 kg

Density of copper: Copper has a density of 8.96 g/cm³, so we can convert two cubic meters to cubic centimeters and multiply by the density to get the mass of two cubic meters of copper: Density of copper = 8.96 g/cm³2 cubic meters = 2000000 cubic centimeters8.96 g/cm³ x 2000000 cubic centimeters = 17920000 grams or 17920 kg.

To learn more about Density:

https://brainly.com/question/29775886

#SPJ11

Answer:

50kg

Explanation:

Using the formula for potential energy, which is the amount of energy due to position;

P.E = m × g × h

Where;

m = mass (kg)

g = acceleration due to gravity (10m/s²)

h = height (metres)

According to the information provided in this question, m = ?, P.E = 2500J, h = 5m

Using P.E = m × g × h

m = P.E/gh

m = 2500/(5 × 10)

m = 2500/50

m = 50kg

The mass of the man is 50kg.

The partial pressure of N₂ is 3.75 atm, the partial pressure of O₂ is 2.50 atm, and the partial pressure of CO₂ is 1.25 atm in the given mixture at 25 °C and a total pressure of 10.0 atm.

To calculate the partial pressure of each gas in the mixture, we can use the concept of Dalton's law of partial pressures. According to this law, the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas.

First, we need to find the mole fraction of each gas in the mixture. The mole fraction of a gas is the ratio of the number of moles of that gas to the total number of moles in the mixture. We can calculate the mole fraction using the following formula:

Mole fraction (X) = Moles of gas / Total moles of all gases

For N₂:

Mole fraction of N₂ (X_N₂) = 3.00 mol / (3.00 mol + 2.00 mol + 1.00 mol) = 0.375

For O₂:

Mole fraction of O₂ (X_O₂) = 2.00 mol / (3.00 mol + 2.00 mol + 1.00 mol) = 0.250

For CO₂:

Mole fraction of CO₂ (X_CO₂) = 1.00 mol / (3.00 mol + 2.00 mol + 1.00 mol) = 0.125

Next, we can use the mole fractions to calculate the partial pressures of each gas. The partial pressure of a gas is equal to the mole fraction of that gas multiplied by the total pressure of the mixture.

Partial pressure of N₂ (P_N₂) = X_N₂ * Total pressure = 0.375 * 10.0 atm = 3.75 atm

Partial pressure of O₂ (P_O₂) = X_O₂ * Total pressure = 0.250 * 10.0 atm = 2.50 atm

Partial pressure of CO₂ (P_CO₂) = X_CO₂ * Total pressure = 0.125 * 10.0 atm = 1.25 atm

For more such questions on partial pressure visit:

https://brainly.com/question/19813237

#SPJ8

Polonium - 212 when goes through alpha radiation or alpha emission it gives isotope lead - 206 has atomic number 82.

Isotopes are members of a family of an element that all have the exactly same number of protons but they contain different numbers of neutrons in there structure. The number of protons in a nucleus verify  the element's atomic number of the molecule.

Elements having same atomic number but they are differ in mass number are called as isotopes . There are many isotopes present in periodic table. Atomic number is denoted by Z while mass number is denoted by M.

for example ; Carbon have different isotope i.e. C₁₂,C₁₃,C₁₄

Thus , lead - 206 which having atomic number 82 is isotope remains after the decay of alpha radiation of polonium - 212.

To learn more about isotope follow the link below;

https://brainly.com/question/11680817

#SPJ6

1.57 moles of ammonia gas can form when 52.4 L of hydrogen gas reacts completely with excess nitrogen at STP.

To answer this question, we first need to write out the balanced chemical equation for the reaction between hydrogen gas and nitrogen gas to form ammonia gas:

3H2(g) + N2(g) → 2NH3(g)

From the balanced equation, we can see that for every 3 moles of hydrogen gas used, 2 moles of ammonia gas will be formed. Therefore, we need to use the given volume of hydrogen gas at STP (standard temperature and pressure) to calculate the number of moles of hydrogen gas present:

52.4 L of H2 gas at STP is equivalent to 2.35 moles of H2 gas (using the molar volume of a gas at STP, which is 22.4 L/mol).

Since there is an excess of nitrogen gas present, we can assume that all of the hydrogen gas will react to form ammonia gas. Therefore, we can use the mole ratio from the balanced equation to calculate the number of moles of ammonia gas formed:

2.35 moles H2 × (2 moles NH3 / 3 moles H2) = 1.57 moles NH3

Therefore, 1.57 moles of ammonia gas can form when 52.4 L of hydrogen gas reacts completely with excess nitrogen at STP.

Visit here to learn more about  chemical equation :  https://brainly.com/question/28792948
#SPJ11

Answer:

A dispose of excese as directed

Answer:

(2) Ammonia I hope you good luck

(1) aluminum

Let's look at all the options first:

Learn more:

brainly.com/question/4481914

Answer:its c

Explanation:

Answer: unsaturated

Explanation: because i just took the test

Answer:

All of the above

Explanation:

Answer: V2= 41.2mL

Explanation:

Givens:

* V1= 20ml

* T1 = -109 ⁰C --> K= ⁰C + 273.15 --> 164.15 K

* V2 = ??

* T2= 338.15 K

Use Charles law V1/T1 = V2/T2

Since we are looking for V2 we can rearrange the formula to

V2= (T2 x V1) /T1

V2= (338.15K x 20mL) / 164.15 K

V2= 41.2mL

NOTE:

Temperature should always be in K not in ⁰C or ⁰F

To convert from C to K use

*K= ⁰C + 273.15

Enter your C value in the ( ⁰C ) and you can get K

Find the critical value Za/2 that corresponds to the given confidence level 93%. Za/2=1.81.

We need to look up the value in a standard normal distribution table or use a calculator. The confidence level of 93% implies that the alpha level is (1 - 0.93) = 0.07, and since the distribution is symmetrical, we split this value into two equal parts, giving us 0.035 for each tail. Looking up this value in a standard normal distribution table or using a calculator, we find that the critical value Za/2 is approximately 1.81 (rounded to two decimal places). Therefore, the critical value Za/2 that corresponds to a 93% confidence level is 1.81.

To know more about critical value , here

brainly.com/question/30168469

#SPJ4

The increasing order of electronegativity from lowest to highest in period 3 is sulfur, argon and chlorine. With highest being of chlorine.

For more information on electronegativity kindly visit to

https://brainly.com/question/17762711

#SPJ1

There are three possible energy transitions, corresponding to the emission of photons with wavelengths of 656.3 nm, 486.1 nm, and 434 nm when the H2 molecule decays from the third excited state to the ground state.

When the H2 molecule decays from the third excited state down to the ground state, there are a total of four possible energy transitions that can occur. These are known as the Balmer series and correspond to the emission of photons with wavelengths of 656.3 nm (H-alpha), 486.1 nm (H-beta), 434.0 nm (H-gamma), and 410.2 nm (H-delta). These transitions involve the movement of electrons from higher energy levels to lower energy levels within the H2 molecule, resulting in the emission of photons with specific wavelengths.

learn more about energy transitions here:

https://brainly.com/question/18156550

#SPJ11