Place the following in order from smallest to largest by atomic radius: Rb, Na, K, Cs, P, He.
Group of answer choices

Cs
P
He


Rb
Cs

Answers

Answer 1

Answer:

He

P

Na

K

Rb

Cs

Explanation:

I am not sure if Na was one of the choices, but if it is this is the order. If not then just take out Na and then it is in the correct order.


Related Questions

A sample of neon has a pressure of 56 atm at 29.5 celcius. at what temp in kelvin would the gas exert 75 atm of pressure on the container

Answers

Explanation:

Refer to pic..........

Given that hotter blackbodies produce more energy than cooler blackbodies, why do cooler red giants have much higher luminosity than much hotter red dwarfs?

Answers

The luminosity of a star is determined by its size (radius) and temperature. A star's luminosity is proportional to its surface area times the fourth power of its temperature (L ∝ R^2 x T^4), according to the Stefan-Boltzmann Law and the relationship between the luminosity and temperature is known as the Hertzsprung-Russell (H-R) diagram.

Red giants are much larger than red dwarfs, which means that they have a much larger surface area and thus emit more energy. Although red giants have cooler surface temperatures than red dwarfs, their larger surface area more than makes up for the lower temperature in terms of total energy output.

The reason why red giants are much larger than red dwarfs has to do with the evolution of the star. Red giants are more evolved stars that have exhausted the hydrogen fuel in their cores, causing the core to contract and heat up, while the outer layers of the star expand and cool down. This expansion increases the star's size and surface area, leading to a higher luminosity.

Red dwarfs, on the other hand, are much smaller and cooler than red giants because they are low-mass stars that burn their fuel at a slower rate. As a result, they have longer lifetimes and remain on the main sequence longer, never undergoing the same expansion that red giants do.

Calculate the initial rate for an experiment where both I2
and OCl2 are initially present at 0.15 mol/L.

Answers

When both I2 и OCl2 are present in 0.15 mol/L at the beginning of the experiment, the starting rate is roughly 0.004 M/s.

Provide a concrete illustration of an experiment.

An experiment is described as "a test under controlled circumstances that is made to explain a known truth, to examine the validity of a theory, or even to determine the efficacy from something yet untried" on the inside of the American Heritage Dictionary on the English Language.

How might an experiment be described?

If you sprinkle a plant with water, will it grow more effectively? Compare the plant's development before and after spraying it to get a sense of how it is developing without it.

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What Mass of h20 reacted?

Answers

The mass of water reacted is 17.67g.

What is STP?

STP stands for standard temperature and pressure. STP refers to a specific pressure and temperature used to report on the properties of matter.

According to IUPAC( International Union of Pure and Applied Chemistry), it is defined as -

Temperature of 0 degree celsius (273K)Pressure of 1 atm

It is generally needed to test and compare physical and chemical processes where temperature and pressure plays an important role as they keep on varying from one place to another.

One mole of a gas under STP conditions occupies a volume of 22.4L.

Given,

Volume of oxygen = 11L

Since 1 mole of a gas occupies 22.4 L of volume at STP.

Moles of oxygen produced = 11 ÷ 22.4

                                              = 0.49 moles

From the reaction,

1 mole of oxygen is produced by 2 moles of water.

Thus, 0.49 moles of oxygen is produced by 0.49 × 2 moles of water

So, moles of water = 0.98 moles

mass = moles × molar mass

          = 0.98 × 18

            = 17.67g

Therefore, mass of water reacted is 17.67g.

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If 25.0 grams of carbon (graphite) and 66.6 grams of oxygen combine to form carbon dioxide, how many grams of carbon dioxide must form?

Answers

According to the question 88.4 grams of carbon dioxide must form.

What is carbon dioxide?

Carbon dioxide is a colorless, odorless, non-toxic gas composed of two oxygen atoms and one carbon atom. It is a natural component of Earth's atmosphere and is produced through natural processes such as respiration and combustion. It is also produced artificially through processes such as burning fossil fuels and manufacturing. Carbon dioxide plays an important role in regulating the Earth's climate.

The reaction equation for the formation of carbon dioxide is:

C (graphite) + O2 → CO2

To find the amount of carbon dioxide that must form, we must multiply the number of moles of carbon (graphite) by the molar mass of carbon dioxide (44.01 g/mol).

25.0 g C × (1 mol C / 12.01 g C) × (44.01 g CO2 / 1 mol CO2) = 88.4 g CO2

Therefore, 88.4 grams of carbon dioxide must form.

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Which of the following is NOT an accurate way to measure wavelength?

A. crest to trough
B. trough to trough
C. half crest to half crest
D. crest to crest​​

Answers

Answer:

B. trough to trough is NOT an accurate way to measure wavelength.

Explanation:

The correct way to measure wavelength is from crest to crest or from trough to trough, as these are the points of maximum displacement in the wave. Alternatively, one could measure from a point halfway between two crests (or two troughs) to another point halfway between the next two crests (or troughs), which is known as half crest to half crest measurement.

Final answer:

The accurate ways to measure the wavelength of a wave are between two crests (crest to crest), two troughs (trough to trough), or half crest to another half crest. Measuring from a crest to a trough gives half the wavelength. Therefore, option A (crest to trough) is not an accurate way to measure wavelength.

Explanation:

In the context of wave physics, the accurate ways to measure the wavelength of a wave are between two successive crests (crest to crest), or two troughs (trough to trough). The measurement from a half crest to another half crest is also valid, as it essentially represents the same distance as from crest to crest or trough to trough. However, measuring from a crest to a trough does NOT give you the wavelength, but instead it gives you half the wavelength because a complete wave cycle is from crest to crest or trough to trough. Therefore, option A (crest to trough) is NOT an accurate way to measure wavelength.

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Which of the following is not a characteristic of a sonnet?

14 lines
Blank verse
Iambic pentameter
Rhyme scheme ABAB CDCD EFEF GG

Answers

Blank verse is not a characteristic of a sonnet.

What is not a characteristics of a sonnet?

Blank verse is not a characteristic of a sonnet. Sonnets are typically written in iambic pentameter and have 14 lines, and the rhyme scheme varies depending on the type of sonnet. For example, the Shakespearean sonnet typically has the rhyme scheme ABAB CDCD EFEF GG, while the Petrarchan sonnet has the rhyme scheme ABBAABBA CDCDCD or ABBAABBA CDECDE. Blank verse, on the other hand, is unrhymed iambic pentameter and is typically used in longer poems or plays.

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What is pasteurisation

Answers

Castration is the method of storing milk there was discovered by Louis Pasteur

Explanation:

Castration is the method of storing milk there was discovered by Louis Pasteur

Pasteurization is defined as:

the partial sterilization of a product, such as milk or wine, to make it safe for consumption and improve its keeping quality.

each of the following acids: (a) hydroiodic acid, (b) chloric

acid, (c) nitrous acid, (d) H2CO3, (e) HClO4, (f) CH3COOH.

Answers

We are aware that the chemical formula for chloric acid is (ClO3) nitrous acid, HNO2HNO2, carbonic acid, perchloric acid, and acetic acid (HClO4). HCl is another name for hydrochloric acid.

Which category of acid is hydroiodic acid in?

The term hydroiodic acid, or hydriodic acid, refers to an aqueous solution of hydrogen iodide (HI). In an aqueous solution, it is a strong acid that totally ionizes. It lacks color. A HI of 48 to 57 percent is typical for concentrated solutions.

HClO4 (perchloric acid) is what kind of acid?

A strong acid is perchloric acid (HClO4). A strong acid, according to the theories, is one that entirely ionizes or dissolves easily in water. Because it entirely dissolves in water as well, perchloric acid (HClO4) is a potent acid.

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Method for naming ionic compounds

Answers

The cation is mentioned first, followed by the anion, when identifying an ionic compound. Positive and negative charges must be equal. Certain anions with various forms are denoted by Roman numerals.

What procedures are employed while naming ionic compounds?

Ionic compounds, which are neutral substances, are made up of positively charged ions, known as cations, and negatively charged ions, known as anions. substances with binary ions (ionic compounds that contain only two types of elements).

What is a naming guideline for ionic compounds?

The anion is written after the cation in the name. When a formula unit contains two or more of the same polyatomic ion, the subscript is written outside of the parenthesis.

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Which of these is an example of an agricultural use for radiation?

A. making heavy isotopes to find new elements.

B. irradiating wheat to kill fungus.

C. diagnostic procedures that image inside the body, such as a PET scan.

D. locating leaks in a water line in a building. ​

Answers

An example of an agricultural use for radiation is option B which is irradiating wheat to kill fungus is an example of an agricultural use for radiation.

Radiation in agriculture explained.

Radiation in agriculture refers to the use of various forms of ionizing radiation (such as gamma rays, X-rays, and electron beams) for agricultural purposes. This includes using radiation to improve crop yield and quality, preserve food, and control pests and diseases. Radiation can also be used to induce mutations in plants, which can lead to the development of new varieties with desirable traits such as increased yield, disease resistance, and drought tolerance. Additionally, radiation can be used to sterilize soil and agricultural products, such as spices and herbs, to eliminate harmful pathogens and pests. Overall, the use of radiation in agriculture has the potential to improve food safety, increase productivity, and reduce waste in the agricultural industry.

Therefore, radiation can be used to kill harmful organisms such as fungi and bacteria that can cause disease and spoilage in crops, as well as to improve breeding and seed production in plants.

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Which of the following is used to keep track of the heat flow inside a calorimeter?

Answers

Any time a liquid loses or receives energy, the temperature of the liquid changes.To calculate the amount pf energy change, the calorimeter monitors the weight of the fluid as well as the temperature change.

In a calorimeter, what thermometer is used?

The 6000 series calorimeters' control systems serve as the foundation for the 6772 Calorimetric Thermometer, a high precision temperatures measuring device.It is a crucial component of both the 6755 Solution Calorimeter and the 6725 Semi-micro Calorimeter.

What equipment is utilized in calorimetry?

The calorimeter is a piece of equipment used in calorimetry, a procedure for calculating heat capacity and measuring the temperature of chemical processes or other physical changes.Among the most popular kinds are differential scanning operating, thermal micro cathode rays, titration calorimeters, and accelerated rate calorimeters.

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Rank the compounds above based on increasing intermolecular forces. C2H6, CH3F, CH4, NH3

Answers

Answer:

The intermolecular forces increase in the following order:

C2H6 < CH4 < CH3F < NH3

The reasoning behind this order is as follows:

C2H6 (ethane) is a nonpolar molecule with only dispersion forces, which are the weakest intermolecular forces.

CH4 (methane) is also nonpolar and only has dispersion forces, but it has a slightly larger molecular weight than ethane, which leads to stronger dispersion forces.

CH3F (fluoromethane) is polar and has dipole-dipole forces in addition to dispersion forces. The dipole-dipole forces are stronger than the dispersion forces in this case.

NH3 (ammonia) is also polar and has hydrogen bonding, which is a stronger type of dipole-dipole force.

Explanation:

how is the digestive system important to the muscular system

Answers

Answer:

The digestive system is important to the muscular system because it provides the necessary nutrients and energy required for muscle function and growth. The digestive system breaks down food into smaller molecules such as carbohydrates, proteins, and fats, which are then absorbed into the bloodstream and transported to the muscles. The muscles use these nutrients as fuel for energy during muscle contraction and growth. Additionally, the digestive system helps to eliminate waste products that can impair muscle function, such as lactic acid. Therefore, a healthy digestive system is essential for maintaining optimal muscular function and overall physical performance.

Explanation:

How much heat is transferred when the temperature of 36.4g of aluminum
is raised from 32.5°C to 71.6°C?

Answers

The amount of heat transferred would be 1269.67 J.

Heat transfer calculation

To calculate the heat transferred (q), we can use the specific heat capacity (c) of aluminum, which is 0.903 J/g°C, the mass of aluminum (m), and the change in temperature (ΔT):

q = m x c x ΔT

where ΔT = (final temperature - initial temperature)

Substituting the given values, we get:

ΔT = 71.6°C - 32.5°C = 39.1°C

m = 36.4 g

c = 0.903 J/g°C

q = 36.4 g x 0.903 J/g°C x 39.1°C

q = 1269.67 J

Therefore, the heat transferred when the temperature of 36.4g of aluminum is raised from 32.5°C to 71.6°C is 1269.67 J.

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From his experiments, J. J. Thomson concluded that
cathode ray particles can move at very fast speeds.
cathode ray particles can be moved by electric current.
atoms contain small positively charged particles that are called protons.
atoms contain small negatively charged particles that are called electrons.

Answers

J.J Thomson performed some experiments to demonstrates the structure of atom. He discovered the small negatively charged particles later called the electrons. Hence, option d is correct.

What was atomic model by J.J Thomson ?

There were various atomic models to describe the structure and electronic properties of atom. J.J. Thomson conducted the cathode ray experiment where, he he hit the cathode ray to and measured the electric charge with electrometer.  

From this, he concluded that the electric charge and the cathode rays was combined and are the same entity. The negatively charged particles in the atoms then called as electrons. Therefore, option d is correct.

Thomson demonstrated the plum- pudding model of atom, where the negatively charged electrons are randomly located inside the atom as the seeds in the plum-pudding. But later modern atomic models replaced this concept.

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Relative formula mass- Calculate the relative formula mass of the foll
examples:
1) H₂O

Answers

Answer:

The relative formula mass of H₂O can be calculated by adding the atomic masses of two hydrogen atoms and one oxygen atom in the molecule. The atomic mass of hydrogen is 1 and the atomic mass of oxygen is 16. So, the relative formula mass of H₂O is:

(2 x 1) + 16 = 18

Explanation:

To be considered a cognitive psychologist, you typically need what degree?

All cognitive psychologists work in academia performing research. T OR F

If you want to pursue a career in cognitive psychology, it is important to participate in a DIS during your undergraduate career. T or F

Answers

A Ph.D. or Psy.D. in psychology with a cognitive psychology concentration is normally required to be categorized as a cognitive psychologist. Thus, the choice is between a Ph.D. and a Psy.D.

All cognitive psychologists work in academia performing research. T OR F

False. While most cognitive psychologists do their study in academic institutions, some may work in governmental, nonprofit, or commercial organizations.

If you want to pursue a career in cognitive psychology, it is important to participate in a DIS during your undergraduate career. T or F

False. It is not compulsory to pursue a career in cognitive psychology, even though taking part in a Directed Independent Study (DIS) during your undergraduate studies may be advantageous to get research experience in the field. Other options for developing one's research abilities and experience include working in a lab or doing an internship.

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ANSWER THE FOLLOWING:

Answers

I.B
II.C
III.C
IV.B
I worked everything out on paper and i got a %100

A reaction has a rate constant of 0.012s ^ - 1 at 400.0 K and 0.691s ^ - 1 at 450.0 K.

Determine the activation barrier for the reaction.

Answers

Answer:

The rate constant of a reaction is related to the activation energy (Ea) and the temperature (T) by the Arrhenius equation:

k = A * e^(-Ea/RT)

where k is the rate constant, A is the pre-exponential factor, R is the gas constant, and T is the absolute temperature.

Taking the natural logarithm of both sides of the equation, we get:

ln(k) = ln(A) - (Ea/RT)

We can use this equation to determine the activation energy for the reaction by comparing the rate constants at two different temperatures. For example, at 400.0 K and 450.0 K, we have:

ln(k1) = ln(A) - (Ea/RT1)

ln(k2) = ln(A) - (Ea/RT2)

where k1 is the rate constant at 400.0 K, k2 is the rate constant at 450.0 K, and RT1 and RT2 are the product of the gas constant and temperature at each temperature.

Taking the difference between the two equations, we get:

ln(k2/k1) = Ea/R * (1/RT1 - 1/RT2)

Solving for the activation energy (Ea), we get:

Ea = -R * ln(k2/k1) / (1/RT1 - 1/RT2)

Substituting the given values, we get:

Ea = -8.314 J/mol*K * ln(0.691/0.012) / (1/400.0 K - 1/450.0 K)

Ea = 93.8 kJ/mol

Therefore, the activation energy for the reaction is 93.8 kJ/mol.

Answer:

Ea ≈ 64.4 kJ/mol

Step by step Explanation:
We can use the Arrhenius equation to relate the rate constant (k) to the activation energy (Ea), the universal gas constant (R), and the temperature (T):

k = Ae^(-Ea/RT)

where A is the pre-exponential factor and R is the gas constant. Taking the natural logarithm of both sides of the equation, we get:

ln(k) = ln(A) - Ea/RT

We can use the given rate constants and temperatures to form two equations:

ln(0.012) = ln(A) - Ea/(R*400.0 K)

ln(0.691) = ln(A) - Ea/(R*450.0 K)

Subtracting the second equation from the first, we can eliminate ln(A) and solve for Ea:

ln(0.012/0.691) = (Ea/R)(1/400.0 K - 1/450.0 K)

Ea = -ln(0.012/0.691) * R/(1/400.0 K - 1/450.0 K)

Using R = 8.314 J/(mol K), we get:

Ea = -ln(0.012/0.691) * 8.314 J/(mol K) / (1/400.0 K - 1/450.0 K)

Ea ≈ 64.4 kJ/mol

Therefore, the activation barrier for the reaction is approximately 64.4 kJ/mol

Provide the electron dot structure, the molecular formula, and the structural formula for the molecular compounds that will form from their respective atoms below.
Phosphorus 1 and Oxygen 4
Nitrogen 1 and Oxygen 1
Ammonia NH3 and Hydrogen ION H+
Boron 1 and Nitrogen 1
Please help this is for a quiz I need soon

Answers

Answer:

Phosphorus 1 and Oxygen 4:

Electron dot structure:

.. .

: P :: O :

.. .

Molecular formula: P4O10

Structural formula:

O

//

O=P-O-P=O

O

Nitrogen 1 and Oxygen 1:

Electron dot structure:

: N :

. .

:O:

. .

Molecular formula: NO

Structural formula:

O

//

N=O

Ammonia NH3 and Hydrogen ION H+:

Molecular formula: NH4+

Structural formula:

H

|

H - N - H

|

H

Boron 1 and Nitrogen 1:

Electron dot structure:

: B :

. .

: N :

. .

Molecular formula: BN

Structural formula:

N

/

B=N

Explanation:

what is the iupac name for the following compound? question 20 options: heptaneA. hexaneB. heptaneC. octaneD. nonane

Answers

Answer:

what is the IUPAC name for the following compound? question 20 options: heptane A. hexane B. heptane C. octane D. nonane

C. Octane

Explanation:

Which observations support the law of conservation of mass for electrolytic decomposition of
water

Answers

Answer:

1. The total masses of the products (hydrogen and oxygen gases) is equal to the mass of the water that was decomposed.

2. The number of atoms of each element in the reactants is equal to the number of atoms of each element in the products.

3. The total charge of the reactants is equal to the total charge of the products.

Explanation: water.

Consider the reaction:
CH4 + 2 O2 → CO2 + 2 H2O
Select the true statement:
1. 4.00 moles of CH4 will react with 2.00
moles of O2.
2. The limiting product is CO2.
3. The limiting reactant is CO2.
4. 8.00 moles of O2 can react to produce 144.0 g of H2O.
5. 4.00 moles of O2 can react to produce 4.00 moles of CO2.
6. 88.01 g of CO2 could be produced upon reaction of 64.00 g of O2.

Answers

5. 4.00 moles of O2 can react to produce 4.00 moles of CO2.

What is the relationship between moles of O2 and moles of CO2?

The balanced chemical equation shows that 1 mole of CH4 reacts with 2 moles of O2 to produce 1 mole of CO2 and 2 moles of H2O.Therefore, 4 moles of CH4 would react with 8 moles of O2 to produce 4 moles of CO2.Since the ratio of O2 to CO2 is 2:1, 4 moles of O2 would react with 2 moles of CH4 to produce 2 moles of CO2.Therefore, statement 5 is true: 4.00 moles of O2 can react to produce 4.00 moles of CO2.

According to the balanced chemical equation, the ratio of moles of O2 to moles of CO2 is 2:1, which means that 4 moles of O2 would react with 2 moles of CH4 to produce 2 moles of CO2. Therefore, statement 5 is true.

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