When the sun runs out of hydrogen in its core, it will become larger and more luminous because:.

Answers

Answer 1

Answer:

Faster hydrogen burning means the star will grow larger and more luminous to allow the extra energy created to escape

Answer 2

it starts fusing hydrogen in a shell around a helium core.


Related Questions

• Reflect on the importance of stoichiometry and rate of chemical reaction in the design of car airbags

Answers

Answer:

If an insufficient amount of nitrogen were produced, the air bag would under inflate and not provide adequate protection. Clearly, the stoichiometry of the reaction is very important.

What is the wavelength of an electromagnetic wave that has a frequency of 7.80 * 10 ^ 14 Hz in a vacuum? (The speed of light in a vacuum is 3.00 * 10 ^ 8 m/s.)

A. 1.22 * 10 ^ - 15 * m
B. 3.85 * 10 ^ - 7 * m
C. 2.34 * 10 ^ 23 * m
D. 2.60 * 10 ^ 6 * m​

Answers

Answer:

B.) 3.85 x 10⁻⁷ m

Explanation:

To find the wavelength, you can use the following formula:

wavelength = speed of light / frequency

Since you have been given both the speed of light and frequency, you can plug these values into the equation to find wavelength.

wavelength = speed of light / frequency

wavelength = (3.00 x 10⁸ m/s) / (7.80 x 10¹⁴ Hz)

wavelength = 3.85 x 10⁻⁷ m

The chemical formula for a emerald is BeAl2(SiO3)6.
An emerald can be described as

Answers

Emerald  can be described as a transparent, green coloured gem stone made up of mineral beryl together with trace amount of chromium or sometimes vanadium having chemical formula as [tex]Be_3Al_2(SiO_3)_6[/tex] .


What is the significant of Emerald ?

Through time, the emerald has been known as a symbol of truth and love.

In ancient Greece and Rome, emerald was said to be the gemstone of the goddess Venus, purveyor of love and hope.

On the other side of the world, emeralds were revered by the Incas and believed by the Egyptians to be a source of eternal life.

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Match the zone to its characteristics.
Horse latitudes
Subpolar low
Doldrums
?
?
?
Heavy precipitation, little
wind
The trade winds and
westerlies originate here
Lies along the polar jet
stream

Answers

The zone and its characteristics include the following:

Subpolar low: Lies along the polar jetstream.Horse latitudes: The trade winds and westerlies originate here.Doldrums: Heavy precipitation, little wind.

What is Horse latitude zone?

This is referred to regions which is located at about 30 degrees north and south of the equator and forms the basis of westerlies.

The other zones such as doldrums are also found at the equator with their respective features and can be seen above. This therefore makes it the most appropriate choice.

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predict the missing component in the nuclear equation

Answers

The answer is C since both charge and mass have to be balanced on both sides of the equation.

what is the molarity of the NaOH

Answers

the answer is:

40 g/mole

A distillation column with a partial reboiler and a total condenser is being used to separate a mixture of benzene, toluene, and 1,2,3-trimethylbenzene. The feed, 40 mol% benzene, 30 mol% toluene, and 30 mol% 1,2,3-trimethylbenzene, enters the column as a saturated vapor. We desire 95% recovery of the toluene in the distillate and 95% of the 1,2,3-trimethylbenzene in the bottoms. The reflux is returned as a saturated liquid, and constant molar overflow can be assumed. The column operates at a pressure of 1 atm. Find the number of equilibrium stages required at total reflux, and the recovery fraction of benzene in the distillate. Solutions of benzene, toluene, and 1,2,3-trimethylbenzene are ideal.

Answers

Answer:

11.8.4 Distillation Columns

Distillation columns present a hazard in that they contain large inventories of flammable boiling liquid, usually under pressure. There are a number of situations which may lead to loss of containment of this liquid.

The conditions of operation of the equipment associated with the distillation column, particularly the reboiler and bottoms pump, are severe, so that failure is more probable.

The reduction of hazard in distillation columns by the limitation of inventory has been discussed above. A distillation column has a large input of heat at the reboiler and a large output at the condenser. If cooling at the condenser is lost, the column may suffer overpressure. It is necessary to protect against this by higher pressure design, relief valves, or HIPS. On the other hand, loss of steam at the reboiler can cause underpressure in the column. On columns operating at or near atmospheric pressure, full vacuum design, vacuum breakers, or inert gas injection is needed for protection. Deposition of flammable materials on packing surfaces has led to many fires on opening of distillation column for maintenance.

Another hazard is overpressure due to heat radiation from fire. Again pressure relief devices are required to provide protection.

The protection of distillation columns is one of the topics treated in detail in codes for pressure relief such as APIRP 521. Likewise, it is one of the principal applications of trip systems.

Another quite different hazard in a distillation column is the ingress of water. The rapid expansion of the water as it flashes to steam can create very damaging overpressures.

What is the independent variable for boiling temperature of water as salt is adddd

Answers

The independent variable is the different amounts of salt that will be added to the water.

What is a variable?

A variable is any characteristic, number, or quantity that can be measured or counted.

The independent variable is the different amounts salt that will be added to the water (what is done by the scientist).

The dependent variable is the boiling temperature of the water (what is being measured).

HYPOTHESIS: If salt is added to water then, the boiling temperature is lowered.

Hence, the independent variable is the different amounts of salt that will be added to the water.

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What is the si unit that refers to the number of particles contained in a substance.

Answers

Answer:

one mole contains exactly 6.022 14076 into 10 23 elementary this number is the fix numerical value of the evandi and the constant and a b where expects in the unit mol - 1 is called the abacation number that amount of substance of a system is measured of the number specific

How many moles FeBr3 are required
to generate 275 g NaBr?

2FeBr3 + 3Na₂S → Fe₂S3 +6NaBr

Answers

Answer:

0.893mol

Explanation:

n = m ÷ M

= 275 ÷ (23 + 80)

= 2.67 mol

* now use the Mol ratio *

NaBr : FeBr3

6 : 2

2.67 : x

5.67 = 6x

n( FeBr3 ) = 0.893 mol

Based on our consumption of fossil fuels today, what can be predicted will eventually occur? Select all that apply

Answers

Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.

What are fossil fuels ?

Fossil fuels are made from decomposing plants and animals.

These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy.

Coal, oil, and natural gas are examples of fossil fuels.

Above given fossil fuels are expected to be used up and a new energy developed to supply energy needs of the world.

Therefore, Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.

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The ideal gas law only approximates the behaviour of real gases. The conditions
under which the ideal gas law is MOST accurate are

Answers

Answer:

I d K

Explanation:

Please help!
Three sections of the periodic table are labeled A, B, and C in the image below.

Which of the following statements is most likely true for an element present in section A?

It is dull and brittle.
It is malleable and ductile.
It is a liquid at room temperature.
It is a poor conductor of electricity.

Answers

Answer:

they are metals so they are:-

-malleable

-ductile

because metallic bonding is the same in all direction throughout the solid

How do you separate a honey and water solution?

Answers

Answer:

Keep it undisturbed for some time and let it settle down. Then use a separating funnel, to separate them both

Explanation:

Describe the reasoning behind using phosphorus and boron in conjunction
with one another.

Answers

defective greatest formerly knows sd ghost;

Which of the following is NOT an example of pseudoscience?
A. Psychics
B. Healing crystals
C. Vaccines
D. Acupuncture

Answers

Answer:

I think its vaccines

Vaccines is the answer

What is the name of this hydrocarbon?
hexane
O heptane
O octane
O pentane
Mark this and return
H H H H H
|||||
H-C-C-C-C-C-H
|||II
H H H H H
Save and Exit
Next
Submit

Answers

Answer:

alkanes alkens alkenes and a bromatic hydrocarbons

Answer:

[tex]\huge\boxed{\sf Pentane}[/tex]

Explanation:

The given compound has:5 carbonsall single bonds

Prefix for 5 carbons = Pent

Suffix for all single bonds = ane (since the compound is alkane)

So, the name of this hydrocarbon is:

Pentane

[tex]\rule[225]{225}{2}[/tex]

Which shows two structures that are made mostly of metal?

Answers

Answer:

The bell and the Eiffel tower

the bell and the eiffel tower

HELP FAST PLEASE! If a reaction takes place and the theoretical yield is 73 g and the actual yield is 62 g, calculate the percent yield.


Choices:

A. 76%

B. 1.16%

C. 116%

D. 85%

Answers

Answer:

A

Explanation:

I think it's A. There are good answer for A.

what are the 3 common gases that give off reactions?

Answers

The 3 common gases that give off reactions are Hydrogen sulfide, Carbon monoxide, Nitrogen oxides.

What are off reactions

Off reactions are defined as chemical reactions that occurs when something burns or during combustion of materials which gives off energy.

Some gases that give off reaction are:

Hydrogen sulfideCarbon monoxideNitrogen oxides

Note that these gases are mostly poisonous.

Therefore, the 3 common gases that give off reactions are Hydrogen sulfide, Carbon monoxide, Nitrogen oxides.

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How many moles of electrons are transferred when 2.0 moles of aluminum metal react with excess copper(II) nitrate in aqueous solution to form Al(NO3)3(aq) and Cu(s)

Answers

Moles of electrons:

The moles of electrons that are transferred are 12F

A balanced equation:

2 moles of Aluminium metal react with excess copper(II) nitrate.

[tex]2Al + 3Cu{(NO_3)}_2 \rightarrow 2Al{(NO_3)}_3 +3 Cu[/tex]

Given:

Moles of Aluminium = 2

As Aluminium goes from 0 to +3 oxidation state

[tex]Al \rightarrow Al^{3+} + 3e^-[/tex]

And copper goes from +2 to 0

[tex]Cu^{2+} + 2e^-\rightarrow Cu[/tex]

On balancing the number of electrons we get:

For 1 mole of Al [tex]6e^-[/tex] is required.

Therefore for 2 moles of Al,

Total [tex](2\times6)[/tex]F mole of electrons

Where F= Faraday's constant= 96500 C

So, 12F moles of electrons are transferred.

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Balance the equation in the space below for the reaction of ammonia and oxygen, using the smallest whole number coefficients
NH₂(g) + O₂(g) → N₂(g) + H₂O(g) + energy ​

Answers

The balanced equation of the reaction is:

2 NH₂(g) + O₂(g) → N₂(g) + 2 H₂O(g) + energy

What is a balanced equation of a reaction?

A balanced equation is an equation of a reaction in which the moles of atoms of elements in the reaction are equal on both sides of the equation.

The given equation can be balanced as follows:

2 NH₂(g) + O₂(g) → N₂(g) + 2 H₂O(g) + energy

Therefore, the balanced equation of the reaction is the one in which the moles atoms of reacting elements are equal.

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A can of coke which is 12.0ml and is at a temperature of 18.0°C is placed into a refrigerator freezer. The
can was accidently left over night and the temperature dropped to -1.00°C. What would happen to the
volume of the coke can?

Answers

Answer:

See below

Explanation:

Volume would decrease to temp of approx 4 C  then it would slightly increase to the 1 degree C  point but it would still be a smaller volume than at 18 C .    

  ( this assumes a freezing point of   - 1.11 C for Coke )

The density of lead is 11.3 g/mL. What is the mass of 45 mL of the metal?

Answers

Answer:

510g

Explanation:

45mL..

1mL

_____ = 510g

11.3g

4 Many tourists to China want to see giant pandas. Suggest how this could be used to help to conserve the pandas. ​

Answers

Answer: to protect giant pandas

Explanation:

What does the NaBr + Cl₂ represent
in the reaction?
NaBr + Cl₂ →>>
NaCl + Br₂

Answers

Answer:

The reactants

Explanation:

The molecules on the left side of the reaction are the reactants. Reactants are the molecules which react with one another to form something new.

The molecules on the right side of the reaction are the products. Products are the molecules that form in response to the reaction.

How much energy is required to heat 36. 0 g h2o from a liquid at 65°c to a gas at 115°c? the following physical data may be useful.

Answers

The required energy will be "87752 J".

What is energy?

The definition of energy is "ability to do work," which is the capacity to apply a force that causes an item to move.

Mechanical, heat, chemical, electrical, radiant, nuclear, and sound are the seven types of energy.

The energy will be:

Q1 = 36 × 3.18(100-65)

Q1 = 5267 J

Moles of water = [tex]\frac{36.0}{18}[/tex]

Moles of water = 2

then,

Q2 = 2× 40.7

Q2 = 81.4 KJ

Q2 = 81400 J

Q3 = 36.0 × 2.01(115-100)

Q3 = 1085 J

hence,

Required energy will be= Q1+ Q2+ Q3

Required energy = 5267 + 81400 + 1085

Required energy = 87752 J

hence, 87752 J energy is required to heat 36. 0 g h2o from a liquid at 65°c to gas at 115°c.

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When some water condensed
onto a glass, it released 9.15 Cal
of energy. How many joules of
energy is this?
[?] joules

Answers

When we convert 9.15 Calories to joules, the result obtained is 38.28 Joules

How do i convert 9.15 calories to joules?

From the question given above, the following data were obtained:

Energy (in Calories) = 9.15 caloriesEnergy (in Joules) =?

The conversion scale to convert calories to joules is given below:

1 Calorie = 4.184 Joules

Using the above scale, we can convert 9.15 calories to joules as shown below:

1 Calorie = 4.184 Joules

Therefore,

9.15 Calories = (9.15 Calorie × 4.184 Joules) / 1 Calorie

9.15 Calories = 38.28 Joules

Thus, we can conclude from the above calculation that the energy in joules is 38.28 Joules

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Answer:

38,200J

Explanation:

 9.15 x 4.18 x 1000= 38,247 → 38,200J

anyone? got an answer​

Answers

Hshshshshjshshshshssgsghsgsgshshshshshshs THE ANSWER IS D

Which compound contains only nonpolar covalent bonds?.

Answers

Answer:

02 or oxygen if im not mistaken

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