3. How has the HST managed to withstand harsh space conditions and operate for
long period of time?

Answer:

Abiotic factors are the non-living parts of the environment that can often have a major influence on living organisms. Abiotic factors include water, sunlight, oxygen, soil and temperature. ... Without water, animals become weak and confused, and they can die if they do not rehydrate. For example, if a plant is adapted to low temperatures and the specific are where it lives, has a change in its temperature(thanks to global warming!), this plant will die and this area will no longer support life, which is due to the change in abiotic factor (temperature) Many forces influence the communities of living organisms present in different parts of the biosphere (all of the parts of Earth inhabited by life). The biosphere extends into the atmosphere (several kilometers above Earth) and into the depths of the oceans. Despite its apparent vastness to an individual human, the biosphere occupies only a minute space when compared to the known universe. Many abiotic forces influence where life can exist and the types of organisms found in different parts of the biosphere. The abiotic factors influence the distribution of climates, flora, and fauna. so the answer is C

Explanation:

Pls brainlist :) hope I helped.

Image 1

1) There is more proton repulsion in Uranium than in Barium

2) Barium experiences a stronger force holding the nucleons together

3) The repulsion of the neutrons in Uranium makes the nuclide unstable

4) The higher the atomic number, the more likely that the nucleus is radioactive.

5) U-238 has 146 neutrons

6) U - 235 has 143 neutrons

Image 2;

1) You can minimize background radiation by limiting your outdoor exposure.

2) Cosmic radiation is the most difficult to avoid.

The natural radiation that is constantly present in the environment is known as background radiation.

It includes internal radiation found in all living things as well as cosmic radiation, which originates from the sun and stars and terrestrial radiation, which originates from the Earth.

We know that the repulsion of the protons in the Uranium nucleus is more than that of the barium nucleus because there are more neutrons in the Uranium nucleus. It is this repulsion that makes Uranium unstable.

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Answer:

it 3

Explanation:

Answer:

1 s-orbital, 3 p-orbital and 5 d-orbital

Answer:

there are a total of nine orbitals in a third energy level

Explanation:

Explanation:

oh shi sorry I wish I could help but I'm stupid

First convert celcius to Kelvin.

20 + 273 = 293K

31 + 273 = 304K

Now we can set up an equation based on the information we have.

V1 = 5

P1 = 365

T1 = 293

V2 = 5

P1 = x

T2 = 304

The equation be:  \(\frac{(5)(365)}{293} = \frac{5x}{304}\)

Now just solve.

1825/293 = 5x/304

Cross multiply.

554800 = 1465x

Divide both sides by 1465

x = 378.7030717 which can then be rounded to 378.7 mmHg

The volume of acid we will require in this situation is 27000 mL.

We are aware that understanding the reaction equation is necessary because it is the first step in resolving the issue at hand;

Having said that,

CaCO3 + 2HCl → CaCl2 + H2O + CO2

Acid molarity = antilog (-1.55).

The number of base moles;

38 g/100 g/mol

= 0.38 moles

If 2 moles of acid and 1 mole of base combine;

The base responds with 0.38 * 2/1 moles.

= 0.76 moles

Volume = n/M

= 0.76/ 0.028

= 27 L or 27000 mL

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We are going to start with an example:

A reactant; B Product

If we consider just: A ==> B, we have a direct rate. This tells us that A is consumed in the reaction and B is formed as a product.

As we have a reversible reaction, we can have another situation: B ==> A, then we have an indirect rate.

At a certain time and we can say infinite time, there will be no change in the amount of products and reactants. The rates of reaction for the forward (direct) and backward (indirect) reactions are the same which means that the reaction has reached an equilibrium.

----------------------------------------------------

Always remember this: in equilibrium, the amounts of reactants or products no longer change and chemical equilibrium is a dynamic process.

Answer:

Molarity = 1.4 M

Explanation:

Given data:

Mass of LiCl = 15.25 g

Volume of solution = 250 mL (250/1000 = 0.25 L)

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Now we will calculate the number of moles of LiCl.

Number of moles = mass/molar mass

Number of moles = 15.25 g/ 42.39 g/mol

Number of moles = 0.36 mol

Molarity:

Molarity = 0.36 mol / 0.25 L

Molarity = 1.4 M           (M= mol/L)

The water cycle, also known as the hydrologic cycle, is the continuous movement of water on, above, and below the surface of the Earth.

The water cycle involves a series of physical processes, including evaporation, condensation, precipitation, and runoff, that work together to move water from one location to another and to maintain the balance of water on Earth.

The water cycle begins when water from oceans, lakes, rivers, and other bodies of water evaporates into the atmosphere due to the heat from the sun. As water vapor rises into the atmosphere, it cools and condenses into clouds. When the clouds become saturated with water vapor, precipitation occurs in the form of rain, snow, sleet, or hail.

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Answer

Explanation

Ethane has a molecular formula of C₂H₆. Its structural formula is CH₃-CH₃ or

According to the question,4.3 grams  would this oxygen (0₂) weigh in its liquid form.

What is the oxygen ?

Oxygen is an essential element for life. It is a colorless, odorless gas that makes up about 21% of the Earth's atmosphere. Oxygen is a vital component for the production of energy in all living things, as it is necessary for the process of respiration. Without oxygen, all living organisms would suffer, as their cells would not be able to produce the energy they need to survive. Oxygen is also necessary for the combustion of fuels, as it helps to create the conditions required for burning to occur. In addition, oxygen is used in many different industrial and scientific processes, ranging from welding to creating rocket fuel. Oxygen is incredibly important to life on Earth and is essential for the survival of all organisms.

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Yes, Fe(s)+CuSO4→FeSO4(aq)+Cu(s) is a redox reaction. The reducing agent is Fe(s), while the oxidizing agent is CuSO4.

Oxidation-reduction reaction is the type of reaction in which electrons are transferred from one element to another. A compound or an element either gains are looses an electron in redox reactions.

Fe(s)+CuSO4→FeSO4(aq)+Cu(s)

From the equation above, Fe(s) is the reducing agent because it gives away 2 electrons and undergoes oxidation reaction.

From the equation above, CuSO4 is an oxidizing agent because it gives oxygen to Fe(s) and undergoes a reduction reaction.

Therefore, the reducing agent is Fe(s), while the oxidizing agent is CuSO4.

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Answer:

B. Holding a liquid that evaporates fast at room temperature

Explanation:

Beakers are useful as a reaction container or to hold liquid or solid samples. They are also used to catch liquids from titrations and filtrates from filtering operations. Laboratory Burners are sources of heat. Burets are for addition of a precise volume of liquid.

B. Holding a liquid that evaporates fast at room temperature

Structural isomers are molecules with the same molecular formula but with different structural formulae. This means that they have the same number and types of atoms, but they are arranged differently. The following two organic compounds are structural isomers of each other.

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Answer:

1

Explanation:

Mass of

C

a

C

N

2

= 75.0 g

From the equation,

C

a

C

N

2

(

s

)

+

3

H

2

O

(

l

)

→

C

a

C

O

3

(

s

)

+

2

N

H

3

(

g

)

1 mol of

C

a

C

N

2

reacts with 3 moles of water to give calcium carbonate and ammonia.

Number of moles of

C

a

C

N

2

,

n

=

G

i

v

e

n

m

a

s

s

M

o

l

a

r

m

a

s

s

Molar mass of

C

a

C

N

2

= 92.11 g/mol

Therefore,

n

C

a

C

N

2

=

75

g

92

.11

g

/

m

o

l

=

0

.814

m

o

l

Moles of water =Therefore,

n

C

a

C

N

2

=

75

g

92

.11

g

/

m

o

l

=

0

.814

m

o

l

Moles of water =

3

×

0

.814

m

o

l

e

s

=

2

.442

m

o

l

e

s

Mass of water needed;

=

m

o

l

e

s

o

f

w

a

t

e

r

×

m

o

l

a

r

m

a

s

s

o

f

w

a

t

e

r

=

2

.442

m

o

l

×

18

g

/

m

o

l

=

43

.956

g

Thus, 43.96 g of water is needed to react with 75 g of

C

a

C

N

2

.

Answer:

\(E=2.06\times 10^{-19}\ J\)

Explanation:

Given that,

The wavelength of electromagnetic radiation is 963.5 nm.

We need to find the energy of a photon with this wavelength.

The formula used to find the energy of a photon is given by :

\(E=\dfrac{hc}{\lambda}\\\\E=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{963.5\times 10^{-9}}\\\\E=2.06\times 10^{-19}\ J\)

So, the energy of a photon is \(2.06\times 10^{-19}\ J\).

Answer:

c or d

Explanation:

i tried a and it was wrong. its not B. and i cant see the rest. its the one that looks like a catipillar tho

Answer:

Its not A or B

Explanation:

Answer:

C. air pollution absorbs carbon dioxide

Explanation:

Carbon dioxide's role in the greenhouse effect is a major contributor to air pollution. Radiation and heat emanating from the earth's surface need to be released out into the atmosphere. But because carbon dioxide levels are so high, there is an ozone effect on the ground level.

The north pole of one magnet is near the South pole of the other magnet.

The ends of a magnet are called its poles. One end is called the north pole, the other is called the south pole. If you line up two magnets so that the south pole of one faces the north pole of the other, the magnets will pull toward each other.

Answer:

A). Lewis Acid

Explanation:

deez

The term that best describes the compound that accepts electrons from another substance to form a covalent bond is Lewis acid.

Lewis acid is a compound or ionic species which can accept an electron pair from a donor compound while a Lewis base is a compound such as the OH- ion, that can donate a pair of non-bonding electrons.

According to this question, a compound accepts electrons from another substance to form a covalent bond.

Therefore, the term that best describes the compound that accepts electrons from another substance to form a covalent bond is Lewis acid.

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The fact that hydrogen peroxide slowly decomposes over time without the addition of any other chemical indicates that the hydrogen peroxide solution that can be purchased in stores is not pure and has been stabilized with other chemicals to prevent it from breaking down too quickly. This is common practice, as pure hydrogen peroxide is unstable and can be dangerous to handle.

One potential safety hazard associated with hydrogen peroxide solutions that have been stabilized with other chemicals is that they can sometimes release oxygen gas when they come into contact with other substances. This can cause the solution to bubble and froth, which can make it difficult to measure and handle safely. In extreme cases, the release of oxygen gas can cause the solution to become pressurized and explode. It is important to handle hydrogen peroxide solutions with care and to follow the instructions on the label to avoid potential hazards.

CH3-CH=CH-CH3 is show Isomerism.

What is Isomerism?

Isomorphism is the term used in science to describe the phenomena of molecules having the same chemical formula but various structural forms.

As well as possessing distinct structural formulas, isomers exhibit various physical and chemical characteristics.

When two or more different chemical compounds have the same molecular formula, the phenomenon known as isomerism takes place. Greek words isos, which means "equal," and meros, which means "portion," were combined to create the name. Swedish scholar Jacob Berzelius first introduced the phrase and idea in 1830.

Because the arrangement of the atoms in a molecular formula is flexible, isomers—compounds with different physical and chemical properties—are created.

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Answer:

Ionic bonds are important because they allow the synthesis of specific organic compounds. Scientists can manipulate ionic properties and these interactions in order to form desired products. Covalent bonds are especially important since most carbon molecules interact primarily through covalent bonding

Explanation:

hope this helps!! have a great day!! (can u mark me brailyest plzz) :D

Answer:

my guess is gonna be Yelllow stars

Hope this is right

The energy of stars is mainly due to the nuclear fusion reaction taking place at the center. There are several stars like red, blue, etc. The hottest stars are blue stars.

A massive ball of hot glowing matter inside the space is defined as the star. This glowing matter is called plasma. It is the gravity which holds the stars together. The smallest stars are called red dwarfs.

The stars are classified on the basis of several factors like temperature, spectra and luminosity. It is the blue stars which have high surface temperature of about 10000 K. They appear as blue. They are of types 'O', 'B', and 'A'.

'O' type blue stars are the hottest reaching over 25,000 K. 'B' type has temperature in the range of 11,000-25000 K. 'A' type blue stars have surface temperatures ranging from 7,500 to 11,000 K.

Thus blue stars have high surface temperature.

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The value of Kc for the given reaction is 0.0579 (rounded to four decimal places).

The formula for the equilibrium constant, Kc, of a reaction is given by the ratio of the product of the concentrations of the products raised to their respective stoichiometric coefficients to the product of the concentrations of the reactants raised to their respective stoichiometric coefficients.

The stoichiometric coefficients are the coefficients in the balanced chemical equation.

To determine the value of Kc for the reaction given by the following chemical equation:N2(g) + 3 H2(g) ⇌ 2 NH3(g)

we first need to write the expression for Kc.

The expression for Kc is given by the following formula:Kc = [NH3]² / [N2][H2]³.

We are given the equilibrium concentrations as follows:[N2]eq = 2.66 M[H2]eq = 0.64 M[NH3]eq = 3.34 M

We can substitute these values into the expression for Kc and obtain the following:Kc = (3.34)² / (2.66)(0.64)³ = 0.0579 (rounded to four decimal places).

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