check the pair of species where the first member is smaller in diameter than the second member. select one: a. li < be2 b. al < al3 c. f < f- d. be < o

Answer:

10⁻³⁶ s

Explanation:

There is much speculation, but many scientists believe the universe started expanding about 10⁻³⁶ s  after the Big Bang.

The specimen is 150 million years old if the parent-daughter isotopes have a ratio of 1:8.

The half-life of a given radioactive isotope is 100 million years.

A mineral specimen contains 2 parent isotopes for every 14 daughter isotopes.

Assuming no escape of parent or daughter during decay, the specimen is 150 million years old.

How to calculate?

This means that, since the radioactive isotope decays at a constant rate, after 100 million years, only half of the parent material will remain in the sample.

After 200 million years, only a quarter will remain, and so on.

Since the sample has twice as many parent isotopes as daughter isotopes, and since half of the parent isotopes decay every 100 million years, the age of the sample is calculated by multiplying the half-life by the number of half-lives that have occurred.

Therefore, if the sample contains 2 parent isotopes for every 14 daughter isotopes, it has a ratio of parent to daughter isotopes of 2:16, or 1:8.

Every 100 million years, one-half of the parent isotopes decay to become daughter isotopes.

As a result, the ratio of parent to daughter isotopes is reduced by one-half every 100 million years.

This sequence may be summed up as follows:

1: 2 to 14 (or 1:7)

2: 1 to 15 (or 1:15)

3: 1 to 31 (or 1:31) And so on.

The specimen is 150 million years old if the parent-daughter isotopes have a ratio of 1:8.

Learn more about  radioactive isotope from this link:

https://brainly.com/question/8492893

#SPJ11

Solar radiation, temperature, and rainfall are the three main climatic elements that affect how quickly plants grow, develop, and produce food. The buildup of dry materials must occur at the ideal temperature.

Solar radiation, temperature, and rainfall are the three main climatic elements that affect how quickly plants grow, develop, and produce food. The buildup of dry materials must occur at the ideal temperature. The following are some of the ideal circumstances for strong plant growth: Air temperature: 24 °C Day/ 19 °C Day (75F/65F) H2O temperature: cold at 26 °C, hot at 24 °C, not to exceed 25 °C. Minimum of 50 and no more than 70% relative humidity These fundamental resources for the food-producing industry, according to Perrin, include land, water, and other natural resources as well as important aspects like climate and ecological resilience. Environmental elements include air, water, soil, climate, native plants, and landforms. By definition, environmental factors have an impact on daily life and are a significant contributor to the disparities in health that exist between different geographic regions.

Learn more about Solar radiation here:

https://brainly.com/question/23338147

#SPJ4

Answer: The products will be copper and oxygen.

Explanation: Copper electorde is an active electrode so it constantly takes part in the electrolysis. Cathode is a pure copper negative electrode and anode is a impure copper positive electrode. So the copper present in the solution, along with the copper present in the anode will come off and go to the cathode. As a result, cathode gains copper. And the remaining impurities settle down in the bottom.

In the anode, oxygen will be given off because according to the order of discharge, if SO4 is present then the ions will stay in the solution and oxygen will be released. So at the end, solution of SO4 and H2O will be remaining while copper and oxygen is extracted.

The half equations are-

Cathode: Cu2+ + 2e- = Cu

Anode: Cu + 2e- = Cu2+

Something you might not know: The solution in electrolysis turns blue when copper goes to the cathode. So copper electrodes are also used in electroplating.

Answer:

C. WATER VAPOUR

these are gaseous in state so gases have more entropy than other states.

nope it helps

have a nice day

Answer:

The answer according to me.............

Explanation:

The energy of each of the two gamma rays created in a proton-antiproton annihilation is 2.99 x 10⁻¹⁰ J.

The energy of each of the two gamma rays created in a proton-antiproton annihilation can be calculated using the formula E = mc², where E is energy, m is mass, and c is the speed of light.

The total mass of the proton-antiproton system is 2mₙ, where mₙ is the mass of a single proton or antiproton. During annihilation, this mass is completely converted into energy in the form of two gamma rays. Therefore, the energy of each gamma ray is given by:

E = (2mₙ)c² = (2 x 1.67 x 10⁻²⁷ kg)(3.00 x 10⁸ m/s)² = 2.99 x 10⁻¹⁰ J

Thus, the energy of each of the two gamma rays created in a proton-antiproton annihilation is 2.99 x 10⁻¹⁰ J.

To know more about proton-antiproton annihilation refer here:

https://brainly.com/question/28555904#

#SPJ11

Answer: 0.135 M

Explanation:

Answer:

10g/ml

Explanation:

d=m/v

=1000/100

=10g/ml

In the given redox reaction, magnesium (Mg) is being oxidized, losing electrons to form Mg²⁺. Copper ion (Cu²⁺) is being reduced, gaining electrons to form copper (Cu).

To balance the redox reaction:

Mg + Cu²⁺ → Cu + Mg²⁺

Split the reaction into two half-reactions, one for oxidation and one for reduction:

Oxidation half-reaction: Mg → Mg² + 2e⁻

Reduction half-reaction: Cu² + 2e⁻ → Cu

Balance the elements other than hydrogen and oxygen in each half-reaction:

Oxidation half-reaction: Mg → Mg²⁺ + 2e⁻

Reduction half-reaction: Cu²⁺ + 2e⁻ → Cu

Balance the charges in each half-reaction by multiplying the oxidation half-reaction by 2:

2Mg → 2Mg²⁺ + 4e⁻

Reduction half-reaction: Cu²⁺ + 2e⁻ → Cu

Combine the two half-reactions:

2Mg + Cu²⁺ → 2Mg²⁺ + Cu

The reactant undergoing oxidation is magnesium (Mg), as it loses electrons and forms Mg²⁺. The reactant undergoing reduction is copper ion (Cu²⁺), as it gains electrons and forms copper (Cu).

To know more about the redox reaction refer here :

https://brainly.com/question/13978139#

#SPJ11

The molarity of the solution is approximately 0.148 M.

To calculate the molarity of a solution, you need to know the moles of solute and the volume of the solution in liters.

First, let's determine the moles of solute (C₆H₁₂O₆) using its mass and molar mass. The molar mass of C₆H₁₂O₆ is calculated by adding the atomic masses of carbon, hydrogen, and oxygen:

C6H12O6:

6 carbon atoms (C) x atomic mass of carbon = 6 * 12.01 g/mol = 72.06 g/mol

12 hydrogen atoms (H) x atomic mass of hydrogen = 12 * 1.01 g/mol = 12.12 g/mol

6 oxygen atoms (O) x atomic mass of oxygen = 6 * 16.00 g/mol = 96.00 g/mol

Total molar mass of C₆H₁₂O₆ = 72.06 g/mol + 12.12 g/mol + 96.00 g/mol = 180.18 g/mol

Next, we can calculate the moles of C₆H₁₂O₆: moles = mass / molar mass = 40.0 g / 180.18 g/mol ≈ 0.222 mol

Now, we need to convert the volume of the solution from milliliters to liters:

volume = 1500 ml = 1500 ml / 1000 ml/L = 1.5 L

Finally, we can calculate the molarity (M) of the solution using the formula:

Molarity = moles of solute / volume of solution in liters

Molarity = 0.222 mol / 1.5 L ≈ 0.148 M

Therefore, the molarity of the solution is approximately 0.148 M.

for more questions on molarity
https://brainly.com/question/30404105
#SPJ8

Chloroform (\(CHCl_{3}\)) is a polar molecule due to its asymmetrical shape.

The asymmetrical shape of the molecule \(CHCl_{3}\) arises from the presence of the chlorine atom, which has a higher electronegativity than the hydrogen atoms.

This results in the chlorine atom having a partial negative charge and the hydrogen atoms having a partial positive charge.

This unequal distribution of charge gives the molecule a permanent dipole moment, making it a polar molecule and hence chloroform is not a nonpolar molecule.

Additionally, due to the large difference in electronegativity between the chlorine and hydrogen atoms, the molecule exhibits significant dipole-dipole intermolecular forces, which further reinforces its polarity.

To learn more about polar, click here:

https://brainly.com/question/30002497

#SPJ4

Answer:

c

Explanation:

QUESTION :WHAT TYPE OF BOND IS CA + AR

ANSWER :

C .

COVALENT.

HOPE IT HELP

THANK ME LATER.

the real gas pressure for above question was 91.4atm

what is van der waals equatio?

The Van der Waals equation (or Van der Waals equation of state) is an equation of state used in chemistry and thermodynamics that extends the ideal gas law to take into account the effects of interactions between molecules in a gas as well as accounting for the finite size of the molecules.

The ideal gas law views gas molecules as point particles that interact only with their surroundings and not with one another, which means that when they collide, they do not occupy any space or change their kinetic energy.

The volume V occupied by n moles of any gas has a pressure P at a temperature T determined by the following relationship, according to the ideal gas law, where R is the gas constant:

PV=nRT

(pxn2a/v2) (v-nb)=nRt

p 10x1.36/2.41x2.41-10x0.0318

p 13.6/2.41x2.092

nRt=p2.69

10x0.08206x300/2.69

=91.4atm

therefore the real gas pressure =91.4atm

to learn more about real gas pressure follow the given link: https://brainly.com/question/13313291

#SPJ4

1. The slope of the best-fit line is 0.838.

2. The y-intercept of the best-fit line is not applicable for calculating AH.

3. The y-intercept of the best-fit line was not provided for calculating AS.

4. The solubility of Borax is expected to increase as temperature increases because as T increases, ΔH/RT becomes smaller, leading to a larger value of K.

5. It was necessary to ensure that some solid was present in the main solution before taking the samples to measure Ksp to ensure the dissolution process was at equilibrium.

To answer the questions, let's complete the calculations and analysis based on the provided data:

Table 2. Calculations

                                                ~60°C trial   ~50°C trial   ~40°C trial   ~30°C trial   ~20°C trial

Vol. of HCl used (mL)                    16.80          9.90          6.38                 3.71            2.20

Moles of HCl used (mol)             0.00840     0.00495    0.00319       0.00186        0.00110

Moles of borate present (mol)   0.00420      0.00124    0.00160       0.000930   0.000550

[Borate] (M)                                     0.833         0.501        0.317                 0.187          0.109

Ksp   2.31

In(Ksp)   0.838

To calculate the enthalpy change (ΔH) and entropy change (ΔS) for dissolving Borax, we need to plot the values of In(Ksp) vs. 1/T and find the slope and y-intercept of the best-fit line. Then, we can use the equation In(K) = -4AS + R, where A is the slope and R is the gas constant, to calculate ΔH and ΔS.

From the given data, we have:

The slope of the best-fit line: A = 0.838

Y-intercept of the best fit line: -4AS + R = -4(0.838)S + R

To calculate ΔH and ΔS, we need the values of R (the gas constant) and the temperature (T). The value of R is 8.314 J/(mol·K), and T is the absolute temperature in Kelvin (K).

1. The slope of the best-fit line is 0.838.

2. To calculate ΔH (AH), we need the y-intercept of the best-fit line. The equation -4AS + R represents In(Ksp), not AH. Therefore, the y-intercept is not related to AH.

3. The y-intercept of the best-fit line is not applicable to calculate AH.

4. To calculate ΔS (AS), we need the y-intercept of the best-fit line (-4AS + R). However, it was not provided in the given information.

Now let's move on to the additional questions:

1. Do you expect the solubility of Borax to increase or decrease as temperature increases? Select the option that best explains why.

  - A. Solubility will increase because as T increases, ΔH/RT becomes smaller, therefore K will get larger.

2. Why was it necessary to make sure that some solid was present in the main solution before taking the samples to measure Ksp? Select the option that best explains why.

  - B. To ensure the dissolution process was at equilibrium. By having some solid present, it ensures that the solution is saturated and at equilibrium with the solid solute.

Learn more about borax at https://brainly.com/question/12970644

#SPJ11

Answer:

just to get points

Explanation:

Answer:

A climograph is a graphical representation of the climate of a particular location over a period of time. It typically shows the average temperature and precipitation for a specific location over the course of a year, with the temperature plotted on the y-axis and the months of the year plotted on the x-axis.

The primary function of a climograph is to provide a visual representation of the climate of a particular location, which can be useful for understanding the weather patterns and temperature ranges that are typical for that location. Climographs can also be useful for comparing the climate of different locations, as they provide a convenient way to see how temperature and precipitation patterns differ from one place to another.

Answer:

what the freak is thisnenejehey

Answer:

sandstone

Explanation:

Answer: iron ore

Explanation: The iron ore deposits are found in sedimentary rocks. They are formed by the chemical reaction of iron and oxygen mixed in the marine and fresh water.

Answer:

I believe your answer should be 1 because filteration is a process of removing solid particuless/ and or gasses of matter from the lake in this interpretation. and filtration is used to allow fluidly bodies through but not matter.

The process of filtration is working to remove residue from the lake water. The correct option is A.

Filtration is basically a physical separation method that utilize a filter medium along with a complex structure through that only fluid can pass to separate solid matter and fluid from a mixture.

Filtration is the process of separating suspended particles from a fluid by passing the fluid through a porous material while retaining the suspended particles.

It is the separation of solids from a fluid (liquid or gas) by passing it through a filtering device.

The various types of filtration are detailed below.

Thus, the correct option is A.

For more details regarding filtration, visit:

https://brainly.com/question/23001513

#SPJ2

At STP, a mole of pure gas is closest in size to a marble. As a tiny, solid material, a gram of gas at the STP is considerably smaller than a marble. D is the correct response.

At Standard Pressure and Temperature, 22.4 L of any gas will be required to hold 1 mole (STP). The Ideal Gas Law and a balanced chemical equation can be used to determine the amount or mass of gas consumed or created in a chemical process. In other words, the gas that has the greatest number of molecules of a certain gas at a given temperature will occupy the largest volume.

Learn more about STP

brainly.com/question/29356493

#SPJ4

Question: From the following items, which is closest in size to one mole of gas at STP?

A) A car

B) An elephant

C) A microwave

D) A marble

Blue = orange/yellow light (wavelengths around 450-500 nm) is absorbed by the solution that appears blue.

Red = green light (wavelengths around 550-600 nm) is absorbed by the solution that appears red.

Orange = blue light (wavelengths around 450-500 nm) is absorbed by the solution that appears orange.

Green = red light (wavelengths around 650-700 nm) is absorbed by the solution that appears green.

Give a short note on absorption.

Color absorption takes place because substances selectively absorb certain wavelengths of visible light, while transmitting or reflecting others. The color that we perceive is the result of the wavelengths of light that are not absorbed, but rather transmitted or reflected, and detected by our eyes. This phenomenon is commonly used in colorimetric analysis and can provide important information about the electronic structure and composition of a substance.

Hence, the answer is,

Blue = orange/yellow light

Red = green light

Orange = blue light

Green = red light

To learn more about absorption, follow the link:

https://brainly.com/question/24228588

#SPJ4

To dilute the triamcinolone injectable suspension from 10mg/ml to 0.125 mg/ml, we need to dilute it 80 times (since 10 ÷ 0.125 = 80). This means that we need to add 1 part of the 10mg/ml suspension to 79 parts of distilled water.

To calculate how much of each we need, we can use the following formula:

C1V1 = C2V2

where C1 is the initial concentration (10mg/ml), V1 is the initial volume (unknown), C2 is the final concentration (0.125mg/ml), and V2 is the final volume (480ml).

First, we can solve for V1:

C1V1 = C2V2

10mg/ml x V1 = 0.125mg/ml x 480ml

V1 = (0.125mg/ml x 480ml) / 10mg/ml

V1 = 6ml

So we need 6ml of the 10mg/ml triamcinolone injectable suspension.

Next, we can calculate how much distilled water we need to add:

Total volume - volume of triamcinolone suspension = volume of distilled water

480ml - 6ml = 474ml

Therefore, we need to add 6ml of the 10mg/ml triamcinolone injectable suspension and 474ml of distilled water to make 480ml of the final product with a concentration of 0.125mg/ml.

Learn more about suspension here:

https://brainly.com/question/17650174

#SPJ4

Solar panels would most successfully serve its purpose in a place that experiences frequent sunny days. Now, let us go into a long answer and explain why solar panels would be the most successful in places with frequent sunny days.A solar panel is a device that is used to capture sunlight and convert it into electricity.

Solar panels have been increasingly popular in recent years due to their eco-friendliness, cost-effectiveness, and independence from the power grid. However, solar panels require sunlight to produce electricity.Therefore, they work best in places where sunlight is abundant, such as in deserts and tropical regions where they receive sunlight for most of the year. Hence, it is in places with frequent sunny days that solar panels would be most successful.

In places with low elevations, such as coastal areas, solar panels may not be as effective due to the frequent cloud cover and fog. In locations with regular monsoons, it might be difficult for solar panels to receive sunlight for long periods, as rain and cloud cover could obscure the sun. In regions with high daily temperatures, solar panels might be less effective as they become less efficient when they get too hot.In conclusion, solar panels work most effectively in places with frequent sunny days, as the more sunlight they receive, the more electricity they can produce.

To know more about tropical regions visit:-

https://brainly.com/question/14517126

#SPJ11

The mass fraction of the pro eutectoid phase is approximately 0, and of the pearlite phase is approximately 1.

In iron-carbon alloy with 0.60 wt% carbon, the pro eutectoid phase is cementite (Fe₃C). To calculate the mass fractions of the pro eutectoid phase and the pearlite phase,  consider the eutectoid reaction.

Eutectoid reactions in iron-carbon alloys are usually found at a composition of approximately 0.76 wt% carbon. As the alloy in question contains 0.60 wt% carbon it is hypo-eutectoid (i.e., below the eutectoid composition).

The lever rule will be used to calculate this equation  as follows:

f₁ = \(\frac{C_{0} - C_{e} }{C_{1} - C_{e} }\)

where the values represent here :

f₁ = mass fraction of the pro eutectoid phase (cementite),

Cₒ =carbon content in the alloy (0.60 wt%),

Cₑ =eutectoid composition (0.76 wt%),

C₁ = carbon content in the cementite phase (6.70 wt% carbon).

After substituting the given values into the equation:

f₁ = \(\frac{0.60 - 0.76}{6.70 - 0.76} \\\)

f₁ = \(\frac{0.16}{5.94}\)

f₁ ≈ -0.027

Here the negative value of f₁ shows that there is no pro eutectoid phase present in the alloy. Rather, the entire alloy consists of the pearlite phase.

Hence ,  the mass fraction of the pro-eutectoid phase is approximately 0, and the mass fraction of the pearlite phase is approximately 1.

Learn more about alloy :
brainly.com/question/1759694

#SPJ4

The technique used to separate and collect a precipitate of lead iodide from the solution formed when aqueous solutions of lead nitrate and sodium iodide are mixed is called filtration.

Specifically, vacuum filtration is commonly used in chemistry labs to separate solids from liquids. The precipitate of lead iodide is collected on the filter paper while the liquid passes through and is collected separately.

Lead iodide is a chemical compound composed of lead (Pb) and iodine (I) with the chemical formula PbI2. It is a yellowish, crystalline solid that is insoluble in water. Lead iodide is commonly used as a detector material for gamma radiation and as a pigment in ceramics, glass, and plastics. It can also be used in the production of solar cells and as a component in the manufacture of semiconductors.

Visit here to learn more about lead iodide brainly.com/question/28099104

#SPJ11

The principle of option D. Uniformitarianism states that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the

Option D. Uniformitarianism is the principle stating that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the geologic past. It is based on the idea that the present is the key to the past. In other words, the same natural laws that operate in the universe today have been operating since the beginning of time.

James Hutton was the first to propose this principle in the late 18th century. He suggested that the Earth was shaped by slow-acting geological forces such as erosion, sedimentation, and uplift over long periods of time. He believed that the same processes were still happening today and that they had operated in the past.

This principle is an important concept in geology because it allows scientists to interpret the Earth's history based on the processes that they observe today. By understanding how these processes work and how they have changed over time, scientists can reconstruct the history of the Earth and its environments.

Uniformitarianism has been tested and proven through many observations and experiments. For example, the study of sedimentary rocks has shown that they were formed in the past through the same processes that are observed today, such as deposition of sediment by water, wind, or ice.

Similarly, the study of volcanoes has shown that they are formed by the same processes as today, such as the movement of magma from deep within the Earth.

In conclusion, Uniformitarianism is the principle that allows us to interpret the Earth's history by observing the processes that shape it today. It is a fundamental concept in geology and has been tested and proven through many observations and experiments.

To know more about Uniformitarianism here

https://brainly.com/question/1324266

#SPJ11

The empirical formula of salicylic acid is C2H2O.

The empirical formula of a compound represents the simplest, most reduced ratio of atoms in the compound. To determine the empirical formula of salicylic acid, we need to convert the given mass percent composition of each element into moles and find the ratio of the elements.

Given the mass percent composition, we can assume a 100g sample of salicylic acid. This means that in a 100g sample, there would be 60.87g of carbon, 4.38g of hydrogen, and 34.75g of oxygen.

To find the moles of each element, we divide the given masses by their respective atomic masses:

Moles of carbon (C) = 60.87g / 12.01 g/mol = 5.07 mol

Moles of hydrogen (H) = 4.38g / 1.01 g/mol = 4.34 mol

Moles of oxygen (O) = 34.75g / 16.00 g/mol = 2.17 mol

Next, we divide each element's mole value by the smallest mole value (in this case, oxygen) to get the simplest ratio:

Carbon: 5.07 mol / 2.17 mol = 2.34

Hydrogen: 4.34 mol / 2.17 mol = 2.00

Oxygen: 2.17 mol / 2.17 mol = 1.00

The resulting ratios are approximately 2.34:2.00:1.00, or approximately 2:2:1.

Therefore, the empirical formula of salicylic acid is C2H2O.

Know more about Empirical Formula here:

https://brainly.com/question/32125056

#SPJ11