If the atomic number increases then the atomic radius should decrease right? So what’s wrong with my data

Answer:

Oxygen needs access to two electrons to reach a full octet. Each calcium atom has two valence electrons that it prefers to lose to obtain a full octet. Therefore, one oxygen atom and one calcium atom complement each other and form an ionic bond.

Explanation:

The bond between oxygen and calcium must be ionic given the fact that the electronegativity difference between them is about 2.44.

Calcium prefers to loose two electrons while oxygen receives these two electrons hence the both atoms attain the octet structure.

Recall that an ionic bond is formed by the loss and gain of electrons by two bonding atoms (complete transfer of electrons). Thus the bond between each calcium and oxygen atom is ionic.

Answer:

hot

Explanation:

Answer:

The Answer is (Empty)

Because the deep roots of big trees hold the soil and don't let it slip away simply by rain or wind.

Answer:

the roots of the trees keep the soil in place opposed to a barren landscape that has little to no plants to keep the soil in place

hope this helps (╹ڡ╹ )

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{912}{475} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Number of neutrons in the nucleus.

Explanation:

Mass number is protons plus neutrons. Protons do not change from isotope to isotope

To quote the passage: "...a small hot object can have a

higher temperature but less thermal energy than a large cold object."

In other words, a small object can have a high average thermal energy, and therefore a high temperature, but since the object is smaller, the magnitude of thermal energy present in the object is by default less than that in the larger object.  As the passage indicates, every object has thermal energy.  So, despite the fact that the larger object is colder, it still has a greater thermal energy due to the number of molecules that comprise the larger object.

Based on the passage, an object with a lot of thermal energy might be cold but very large.

Answer:physical change

Explanation:

Answer:

There are

0.0642 mol Na

2

CO

3

in

6.80 g

.

Explanation:

The chemical formula of sodium carbonate is

Na

2

CO

3

. The molar mass of sodium carbonate is

105.988439 g/mol

.

Answer:

"Low levels of the hormone epinephrine, also called adrenaline, cause blood vessels to relax and widen. High levels of this same hormone, along with the hormone norepinephrine, cause the blood vessels to narrow and the heart rate to rise, increasing blood pressure."

Explanation:

Answer:

97.78% KCl in the original sample

Explanation:

The % of KCl in the original sample would be as follows:

[tex]97.78[/tex]%

Given that,

Amount of sample of impure Potassium Chloride [tex]= 0.4500 g[/tex]

Amount of Silver Nitrate precipitated [tex]= 0.8402g[/tex]

Now,

Molarity of KCl = [tex]74.5 g/mol[/tex]

Minimum moles required for reaction [tex]= 0.0059 mol[/tex]

Final number of moles  [tex]= 0.0059 mol[/tex]

So,

Concentration = Number of moles * Molarity

[tex]= 0.0059 mol * 0.74.5 g/mol\\= 0.440g[/tex]

Therefore,

% of KCl in the original Sample = Weight of Pure KCl/Weight of Impure KCl

[tex]= 0.440/0.450[/tex] × [tex]100[/tex]

[tex]= 97.78[/tex]%

Thus, [tex]97.78[/tex]% is the correct answer.

Learn more about "Potassium Chloride" here:

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Answer:abiotic .

Explanation:

There is sufficient evidence to show that Apple violated Section 1 of Sherman Act by making publishers raise price of e-books.

Explanation:

Google

Answer:

1.2×10²³ atoms.

Explanation:

Data obtained from the question include:

Mole of propanone = 0.20 mole

Number of atoms of propanone =.?

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.022×10²³ atoms.

This implies that 1 mole of propanone also contains 6.022×10²³ atoms.

Thus, we can obtain the number of atoms in 0.20 mole of propanone as illustrated below:

1 mole of propanone contains 6.022×10²³ atoms.

Therefore, 0.20 mole of propanone will contain = 0.2 × 6.022×10²³ = 1.2×10²³ atoms.

Thus, 0.20 mole of propanone contain

1.2×10²³ atoms.

The total number of atoms in 0.20 mole of propanone is 1.2×10²³, i.e. in given mole 1.2×10²³ atoms of propanone is present.

In one mole of any substance 6.022 × 10²³ atoms of that substance will present, and this number is known by the name of Avogadro's number.

We have given moles of propanone = 0.20 mole

No. of atoms present in 0.20 mole of propanone = 0.20  × 6.022×10²³ = 1.2×10²³.

Hence, 1.2×10²³ atoms are present in given moles.

To know more about Avogadro's number, visit the below link:

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Answer:

Warm and cold ocean currents can affect the climate of an area along the coast if the winds blow in from the ocean. Warm ocean currents heat the air above the water and carry the warm air to the land, increasing the temperature of the coastal region.

Explanation:

Ocean currents are important to coastal regions for a number of reasons.

Distribute heat. Ocean currents distribute heat around the globe, which helps to moderate the climate in coastal regions. For example, the Gulf Stream brings warm water from the Gulf of Mexico to the coasts of Europe, which helps to keep Europe's climate warmer than it would be otherwise.

Transport nutrients. Ocean currents transport nutrients from the ocean's depths to the surface, which supports marine life. For example, the California Current brings nutrients from the deep ocean to the surface, which supports a rich marine ecosystem off the coast of California.

Diversify marine life. Ocean currents help to diversify marine life by transporting different species to different parts of the ocean. For example, the Kuroshio Current brings warm water from the western Pacific Ocean to the eastern Pacific Ocean, which has helped to diversify the marine life in this region.

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Explanation:

i think the answer is first and last

Answer: the answer is biotic because dear are a living factor

Explanation:

Answer:

i think 4

Explanation:

Answer:

i guess number 4

Explanation:

Answer:

Explanation:

It’s D

Answer:

D. Is it wrong to change or control life forms?

Explanation:

edge 2021 :P

Answer:

There are 11 protons in an atom T.

Explanation:

In chemistry, the scientific word for proton is also known as atomic number so the proton number will be 11.

Answer:

11

Explanation:

Answer: 7 neutrons

Explanation: Atomic number refers to the number of protons in the nucleus of the atom. Also you can treat atomic mass as how many particles (protons and neutrons) are in the nucleus of the atom. So for this problem:

14 particles - 7 protons = 7 neutrons (and we know all that's left over is neutrons because we subtracted all the protons)

Answer:

The tempreature???

Explanation:

Colder tempreatures lead to a slower chemical reaction and warmer tempreatures lead to a faster  chemical reaction.

Answer:

CO2

Explanation:

Answer:

D. The study of living things

Explanation:

prefix "bio-" means life, living things

The scientist philosopher Aristotle is known as the father of biology. The best definition of biology is the study of living things. The correct option is D.

The branch of science which deals with the study of living organisms, their origins, anatomy, morphology, and distribution is known as the biology. Biology is a natural science discipline which studies living things.

The study of living things and their important processes is explained in biology. This field deals with all the physiochemical aspects of life. It is sub divided into other branches like botany, physiology and zoology.

Thus the correct option is D.

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Answer:

soluble starch, maltose and various dextrins.

Explanation:

Explanation:

Not sure if ment like an electric type that gives off energy but here is my answer. a good conductor comes off handy in every situation. meaning, without one a machine, or whatever the conductor is being used for could be unstable, or not be able to work perfectly. which would could lead to certain malfunctions. so a good conductor could also give you a better chance of succeeding.

Answer:

red supergiants is the answer

Answer:

go to the website quizlet it will help you!!!!!!!!

Explanation: