How long does it take for 87.5 % of each isotope(Krypton-73, Krypton-74, Krypton-76, and Krypton-81) to decay?

Answers

Answer 1
1st half-life: 100%/2 = 50%
2nd half-life: 50%/2 = 25% + 50% (from first half-life)
3rd half-life: 25%/2 = 12.5% + 75% (from first and second half-lives

I looked it up...

Related Questions

Which of the following would be the best soil for gardening?
A )A soil that is 35 percent sand, 30 percent clay, and 35 percent silt
B) A soil that is 10 percent sand, 80 percent clay, and 10 percent silt
C) A soil that is 5 percent sand, 20 percent clay, and 75 percent silt
D) A soil that is 85 percent sand, 10 percent clay, and 5 percent silt

Answers

Answer:

C

Explanation:

Silt is very benifical for plant growth. So the one with the most silt would be the best for gardening soil.

Answer: C

Explanation:

Why is it important to pasteurize certain liquids?

Answers

Answer:

Pasteurization involves heating liquids at high temperatures for short amounts of time, it can make it better if you wanted hot cocoa but bad for milk

Explanation:

Answer:

Pasteurization kills harmful microbes in milk without affecting the taste or nutritional value

Explanation:

Which particle has no mass and no charge?
O alpha
O beta
gamma
O
neutron

Answers

Answer:

Neutrons

Explanation:

Answer correctly please !!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!

Answers

The ice cube i think is really cold
The picture is showing us how when you put a cold ice cube in a hot cup of water vapor comes out.

What is Zeff of phosphorus

Answers

Answer:

Explanation:

Here is an illustration showing how to "calculate" +5 as the effective nuclear charge (Zeff) for phosphorus. We are not implying that the electrons are in orbits here, this is simply showing inner shell electrons that shield the outer valence electrons from the full nuclear charge.

We have that The effective nuclear charge Z_{eff} of 3p electron in phosphorus atom is discovered to be approximately 4.80

[tex]Z_{eff}=4.8[/tex]

It is important to note that the Z_{eff} of an element can be defined simply as the average positive charge felt by an shell electron in an atom from the various electrons around it

Hence

The effective nuclear charge Z_{eff} of 3p electron in phosphorus atom is discovered to be approximately 4.80

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Where do most earthquakes occur? Where do most volcanoes occur? Why do they occur here?

Answers

Answer:

The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. The majority of Earth's volcanoes and earthquakes take place along the Ring of Fire

Explanation:

google

Answer:

Most earthquakes occur along the edge of the oceanic and continental plates. The belt exists along boundaries of tectonic plates, where plates of mostly oceanic crust are sinking beneath another plate.

Most volcanoes are found along a belt, called the “Ring of Fire” that encircles the Pacific Ocean. As the plates move, they spread apart, collide, or slide past each other. Sixty percent of all active volcanoes occur at the boundaries between tectonic plates.

Determine the number of moles in a sample of calcium that contains 6.34 x 1022
atoms.

Answers

Answer:

0.105 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{6.34 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.105315...[/tex]

We have the final answer as

0.105 moles

Hope this helps you

Which of the following is NOT n intensive property?

A. Magnetism
B. Boiling point
C. Thermal conductivity
D. Volume

Answers

The answer is D Volume. Volume is an extensive property.

Living Things and Energy
1. Identify one reason why all plants need energy.
A. to produce new cells and structures
* B. to absorb sunlight
C. to absorb oxygen
D. to release carbon dioxide
Try Again

Answers

A. to produce new cells and structures
The answer is A. To produce new cells and structures

Nightmare Land Lab I’m very confused please help

Answers

Answer:

I can help and what are you confused about? pls hurry my lunch break will be over

Explanation:

Why does the rate of dissolution for a gas decrease as the temperature of a solvent increases?


more space for the solute to escape


less space for the solute molecules


less space between solvent molecules


more collisions between solute and solvent molecules

Answers

Answer:

As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return back to the gas phase. As a result, the solubility of a gas decreases as the temperature increases.

Explanation:

“True or False”
Unsaturated solution contains the maximum amount of solute dissolved by a given amount of solvent

Answers

ANSWER- True

EPLANATION

formula for bleaching powder​

Answers

Explanation:

calcium hypo chlorite

Ca(ClO)2

Explanation:

CA(CIO) IS RHE FORMULA FOR BLEACHING POWDER...

kindly mark as brainliest answer

In nuclear fission, when the nucleus is hit the atom will ....what?

Answers

Answer:

When a large, fissile atomic nucleus such as uranium-235 or plutonium-239 absorbs a neutron, it may undergo nuclear fission. The nucleus splits into two or more lighter nuclei, releasing kinetic energy, gamma radiation, and free neutrons.

Explanation:

The __________ system is responsible for bringing oxygen into the lungs and releasing carbon dioxide from the body

Answers

ʕ•ᴥ•ʔ ▼・ᴥ・▼ I think the answer is respiratory system

Answer: ̄ノ゙(。・∀・)ノ゙o(* ̄▽ ̄*)ブ(* ̄3 ̄)╭o(* ̄▽ ̄*)ブ(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭(* ̄3 ̄)╭•)>⌐)↖↗↘↙↜↚↯↟↝↖↔↕↙↘↙↘↘↞↴↯↚↨⇌⇋⇆⇉⇑↶⇋⇋↳¾⁷¼¼⁶⁴⁷⁰⁰⁰⁹⅕⅘⅓⅕⅓⅕⨊⨡⨔⨩⨦⨶⨼⨿⨷⨷⨻⨼⨹₴ The answer is resperitory

Explanation:

Which has a higher frequency: microwaves or blue light? How do you know?​

Answers

Answer:

Microwaves

Explanation:

Microwaves have more energy than blue light

Among microwaves or blue light, blue light has a higher frequency. This is because blue light belongs to the visible region has a short wavelength and produces a higher amount of energy.

What is the relationship between frequency and wavelength?

The frequency of any wave is inversely related to the wavelength. This means that when the frequency of the wave increases, the wavelength decreases. While the relationship between frequency is directly related to the energy.

According to the context of this question, gamma rays have the highest frequency and shorter wavelength, while radiowaves have a shorter frequency and the highest wavelength.

Therefore, blue light has a higher frequency. This is because blue light belongs to the visible region has a short wavelength and produces a higher amount of energy.

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HELP ASAP

1. Where are hurricanes most likely to form?

a Over warm tropical waters


b Over frozen Arctic Waters


c Over a tropical rainforest


d Over cool Atlantic Waters

Answers

Answer:

Hurricanes are the most violent storms on Earth. They form near the equator over warm ocean waters. Actually, the term hurricane is used only for the large storms that form over the Atlantic Ocean or eastern Pacific Ocean. The generic, scientific term for these storms, wherever they occur, is tropical cyclone.

im going to guess the answer is A, sorry if im wrong.

hope this helps.

Why is a synthetic gemstone (made by humans) not considered a mineral?

Answers

Answer:simce it’s manmade, it doesn’t have all the elements it needed if it was natural. It’s basically synthetic or artificial

Explanation:

In a living cell which process uses up atp

Answers

Answer:

Metabolism

Explanation:

because energy change takes place

Why is it important to pasteurize certain liquids?

Answers

Answer:

Pasteurization involves heating liquids at high temperatures for short amounts of time. Pasteurization kills harmful microbes in milk without affecting the taste or nutritional value (sterilization= all bacteria are destroyed).

Explanation:

help me i put max points

Answers

Answer:

D. Catastrophism

Explanation:

Answer:

Catastrophism is the answer :p lol

Explanation:

Which of the following is the correct word equation for the reaction described below?

Calcium hydroxide and hydrogen gas are produced by the reaction of calcium hydride and water.

calcium hydride + hydrogen → calcium hydroxide + water

calcium hydride + water → calcium hydroxide + hydrogen

calcium hydroxide + hydrogen → calcium hydride + water

calcium hydroxide + water → calcium hydride + hydrogen

Answers

Explanation:

calcium hydride + water → calcium hydroxide + hydrogen

hope it helps!

Answer:

B

Explanation:

got it right on edg

Is zinc radioactive

Answers

Answer:

nu

Explanation:

It has five naturally occurring stable isotopes. The most common stable isotope of zinc is Zn-64. Zn-64 has such a long half-life that it radioactive properties are virtually non-existant. ... Zinc is a hard metal, but becomes very malleable above 100 degrees Celsius.

What is the mass of NaCl produced when 2.0 moles of chlorine gas
are reacted with excess sodium? The equation is given.
2 Na + Cl2 → 2 NaCl

Answers

Answer:

Mass = 234 g

Explanation:

Given data:

Mass of NaCl produced = ?

Moles of chlorine = 2.0 mol

Solution:

Chemical equation:

2Na + Cl₂    →     2NaCl

now we will compare the moles of NaCl with chlorine gas.

           Cl₂           :          NaCl

             1            :           2

            2.0         :         2/1×2.0 = 4.0 mol

Mass of NaCl;

Mass = number of moles × molar mass

Mass = 4.0 mol × 58.5 g/mol

Mass = 234 g

can multiple people use one brainly account at the same time on a computer??

Answers

Answer:

No

Explanation:

...............................

Multiple people cannot use one brainly account at the same time on a computer.

No, multiple people cannot use the same Brainly account at the same time on a computer. Brainly accounts are designed to be used by individual users and are intended for personal use. Each user should have their own separate account to access and interact with the Brainly platform. Sharing an account among multiple people simultaneously can lead to confusion, conflicts, and potential violations of the platform's terms of service. It is recommended that each person creates their own individual account on Brainly for a smooth and personalized experience.

Hence, multiple people can't access brainly at the same time.

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Which are long chains formed by the process of polymerization?
1. subunits
2. ethylenes
3. monomers
4. DNA strands

Answers

Answer:

Monomers are long chains formed by the process of polymerization

Explanation:

Answer:

monomers is the correct answer....(C)

Explanation:

hope this helps, the person above me is correct

Which type of bond will likely form between calcium and iodine?

ionic bond
polar covalent
non polar covalent
metallic

Answers

Answer:

ionic bond

Explanation:

cation calcium looses 2 electrons to bond with two iodine atoms to form CaI2 (Calcium Iodide)

Pan of water sitting outside during a hot sunny day. The temperature of the water goes up. What type of heat transfer causes the temperature to go up?

Answers

Answer: Convection

Explanation:

I hope this helps :D

Answer:

Radiation

Explanation:

It said that was the answer on the test.

 

A pan of water is sitting outside during a hot sunny day. The temperature of the water goes up. What type of heat transfer caused the temperature to go up?

conduction

induction

Incorrect: convection

Correct: radiation

if a substance has a large mass and a small volume what can you conclude about?

A. it has a low density
B. it is very dense
C. it is made out of rock or metal
D. it will float on water​

Answers

Explanation:

this answer is a substance has large MS and small volume that are recover Council cute about his sister and brother it has a low distinguish inside incensed a substance is thick and warm

Which of the following is a possible compound formed from Ca2+ and NO3-1?

F Ca2NO3

G Ca(NO3)2

H Ca3NO2

J CaNO

Answers

Answer:

Ca(NO3)2

           .................

Ca(NO3)2 is a possible compound formed from Ca²+ and NO3-¹.

Ions, which are charged atoms of elements come together to form ionic compounds.

A positively charged ion called cation reacts with a negatively charged ion called anion to form a neutral ionic compound i.e. compound with a charge of 0.

In this question, cation Ca²+ reacts with anion NO3-. The ionic compound formed must have a net charge of 0. This can only happen if 2 moles of NO3- and 1 mole of Ca²+ is present in the compound.

The resulting ionic compound can be chemically represented as Ca(NO3)2.

Therefore, Ca(NO3)2 is a possible compound formed from Ca²+ and NO3-¹.

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