i need help please will give brainliest

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, Jet fuels are produced/designed in such a way that they can absorb cold and become as cold as -47 °C; this is because of the cold temperature in which the jet flies. When the fuel absorbs this coldness, the movement of the molecules in the fuel begins to reduce (just like in every other substance undergoing coolness) and keeps reducing as the temperature keeps dropping. Ordinarily, if this temperature reduces to a particular point (freezing point), the movement of the molecules will stop totally leading to the fuel solidifying/freezing (which has happened sometime before the production of more improved fuel with lower temperature that is been used now).

NOTE: There are some perceived spelling errors in the question. For example, it appears the "moluses" is actually "molecules", "befire tge" is "before the" and "tenoerature" is "temperature".

Answer:

B. Took the test lol

Explanation:

hope this helps

Answer:

temperature differences

Explanation:

Solar heating of the Earth's surface is uneven because land heats faster than water, and this causes air to warm, expand and rise over land while it cools and sinks over the cooler water surfaces. ... Wind is the result of pressure changes in the atmosphere.

Answer:

Physical=Ripping

Chemical=Burning

Explanation:

I may be wrong. But I would say these are the answers.

Answer:

ima just take all your points and roll out tbh peace

Explanation:

Answer:

Atoms can gain, lose, or share electrons during a chemical change. Chemical changes do not affect the nucleus of an atom. For this reason, an atom has the ability to retain its properties or identity even if the number of electrons is different. Therefore, the atom's identity won't change.

Explanation:

Answer:

56 g of glucose

Explanation:

We can find the mass of glucose used as follows:

[tex] \%_{m/m} = \frac{m_{s}}{m_{sol}}\times 100 [/tex]   (1)

Where:

[tex]m_{s}[/tex] is the solute's mass =?    

[tex]m_{sol}[/tex] is the solution's mass = 2000 g  

% (m/m)= 2.8 %

By solving equation (1) for [tex]m_{s}[/tex] we have:

[tex] m_{s} = \frac{\%_{m/m}*m_{sol}}{100} = \frac{2.8*2000 g}{100} = 56 g [/tex]

Therefore, you used 56 g of glucose to make 2000 g of a solution of glucose in water.

I hope it helps you!    

The more polar the molecules, the stronger the force. Hence, option C is correct.

Dipole-Dipole forces are the interaction between molecules of the permanent dipole. It occurs between the partially charged positive molecules and partially charged negative molecules.

Polar molecules align themselves so that the δ– end of one molecule is near the δ+ ends of other molecules.

The molecules are thus attracted to each other. Dipole-dipole forces exist between polar molecules.

The greater the polarity, the stronger the dipole-dipole forces.

Hence, option C is correct.

Learn more about dipole-dipole force here:

https://brainly.com/question/14195217

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Answer: Skin

Explanation: You're body has a temperature, and when it touches something, it transfers to you're skin.

Answer:

Answers:Pollution from mining operations.

A direct result of increased consumption of metals is: C. pollution from mining operations.

Mining can be defined as a process through which minerals and metals are excavated from the planet Earth, especially from a reef, vein, seam, lode or an ore body.

Generally, the above process (mining) results in the pollution of the environment.

Pollution can be defined as the physical degradation (contamination) of the environment through an emission of pollutants or waste materials.

Some examples of pollutants or waste materials that are found in different parts of the world are;

In conclusion, pollution from mining operations is mainly as a result of an increased consumption of metals such as lead, tin, etc. because of the degrading processes associated with them.

Read more: https://brainly.com/question/11068732

Answer:

b and c

Explanation:

Because in a chemical change in order for a substance or matter to change shape it needs to either heat up or cool down

Answer:

(ANSWER CHOICES ORDER MAY BE DIFFERENT FROM YOURS!!)

 A.  

The pollen from one flower is transported by an insect to the ovule of another flower.

 B.  

A potato plant produces a tuber, and the next year, a new plant grows from the tuber.

C.  

Part of the stem segment of a cactus plant falls off and begins to form a new plant.

D.  

A new shoot emerges from a strawberry plant and produces another plant.

Explanation:

It's "The pollen from one flower is transported by an insect to the ovule of another flower. " because i got it from study island

Answer: NaCN and HBr

Explanation:

Answer:

A. Gravity and Tension

Explanation:

Gravity and Tension would be the only things changing the rising speed of the elevator.

Normal makes no sense not sure why that is an answer.

Gravity effects how much Tension is pulling on the elevator to go down while the elevator is pushing up.

Let me know if you have any other questions.

Answer:

Mendeleev arranged the elements in order of increasing relative atomic mass . When he did this he noted that the chemical properties of the elements and their compounds showed a periodic trend .

Explanation:

Answer:

Types of fronts because meteorologists are able to predict the weather by the looking at the air mass (fronts) in the atmosphere.

Answer:

Types of fronts

Explanation:

Answer:

4 kilograms/liters

Explanation:

Answer:

15.27895 x 10⁶kg of chlorine radical is added to the atmosphere in a year due to 100 million MVACs                                                                                              

Explanation:

Chlorofluorocarbons (CF₂Cl₂) from refrigerants produce chlorine radicals according to the following equation

         CF₂Cl₂ → CF2Cl  + Cl ⁻ .........(1)

From equation 1, one mole of CF₂Cl₂ produces one mole of Chlorine radical

From the question,

The emission rate of CF₂Cl₂ is 59.5mg/hour/MVAC

In one day the emission rate would be 59.5 x 24hours

                                                                  = 1428mg/day

In one year, the emission rate would be 1428mg/day x 365days

                                                                 =  521220mg/year

                                                                   = 521.220g/year/MVAC

Therefore the emission rate for 100 million MVAC using CF₂CL₂ in a year is

                                                                    = 52122 x 10⁶g/year/MVAC

                                                                    = 52122 x 10³kg/year/MVAC

The molar mass of CF₂CL₂                       = 120.913g/mol

No of moles  of CF₂CL₂                              = mass/ molar mass

                                                                     = 52122 x 10⁶g / 120.913g/mol

                                                                      = 431 x 10⁶ moles of CF₂Cl₂

From equation 1,  since one mole of CF₂Cl₂ produces one mole of Chlorine radical, it implies that

431 x 10⁶ moles of CF₂Cl₂ would produce 431 x 10⁶ moles of chlorine radical,

Therefore, to find the mass of chlorine radical produced, we use the formula

No of moles of chlorine radical  = mass/ molar mass

431 x10⁶ moles = mass of chlorine radical /molar mass of chlorine radical

431 x 10⁶ moles = mass/ 35.45g/mol

mass of chlorine =  431 x 10⁶ moles x 35.45 g/mol

                            =    15278.95 x 10⁶ g

In Kg, the mass    =   15,278.95 x 10³kg of cholrine radical

                             =   15.27895 x 10⁶ Kg of chlorine radical

Answer:

For metals it takes a lot less energy to loose 2 electrons then to gain 6. For nonmetals it is easier to gain 2 electrons then to loose 6.

Youre're welcome <3

Answer:

Arsenic, As, has atomic number 33, which is the number of protons in the nuclei of its atoms. A neutral As atom would also have 33 electrons. The electron configuration of a neutral arsenic atom is [Ar]3d104s24p3

Explanation:

Answer:

As you move left to right, the atomic radius gets SMALLER, so atoms hold on to their electrons more tightly and are more reactive. As you move down a group, the atomic radius gets LARGER, so atoms have a weaker hold on their electrons and are less reactive

Explanation:

if this answer is correct make me as brainlelist

Answer:

i think the answer is yess

Answer:

Limes, Lemons, Vinegar, Stomach acid, Batteries, Sour Candy, etc.

Nitric Acid, Chloric Acid, Carbonic Acid, Citric Acid, Perchloric Acid, Flouric Acid, etc.

Hope this helps!

Explanation:

Answer:

False

Explanation:

Answer:

Kc = 50.5

Explanation:

We determine the reaction:

H₂  +  I₂   ⇄   2HI

Initially we have 0.001 molesof H₂

and 0.002 moles of I₂

If we have produced 0.00187 moles of HI in the equilibrium we have to know, how many moles of I₂ and H₂, have reacted.

           H₂     +      I₂      ⇄   2HI

In:     0.001       0.002           -

R:       x                 x                2x

Eq:  0.001-x    0.002-x      0.00187  

x = 0.00187/2 = 9.35×10⁻⁴ moles that have reacted

So in the equilibrium we have:

0.001 - 9.35×10⁻⁴ = 6.5×10⁻⁵  moles of H₂

0.002 - 9.35×10⁻⁴ = 1.065×10⁻³ moles of I₂

Expression for Kc is =  (HI)² / (H₂) . (I₂)

0.00187 ² /  6.5×10⁻⁵ . 1.065×10⁻³ = 50.5

Answer:

Work and Occupations are a fundamental necessity in life. Society depends upon the production of food, machine, various utensils and articles of daily use, newsprint, etc. ... (ii) They Satisfy Man's Social and Psychological Needs Also: Work is not the same thing as physical effort or the expenditure of energy.

Explanation:

Answer:

Shanika should move the orange coaster car to point B. This movement will result in the largest increase in potential energy. This is because the carts are repelling, which means to increase the potential energy you have to go against the magnetic field. Because the carts are being repelled from the centre magnet to go against the magnetic field you would move the cart closer to the magnet. In this case, moving the orange cart to point b would increase the potential energy greater than any other move.

Explanation:

what i meant in the last sentence was that moving the orange cart to b (closer to centre magnet) would end in a greater potential energy change than moving the other, green, cart closer. This is because of the distances between the carts and the centre magnet. Potential energy does not increase linearly meaning that if a cart is one cart is an inch away from the magnet and another is a foot, if you moved both magnets a cm closer to the centre magnet the one an inch away would have a larger potential energy change.

Answer:

increase

Explanation:

dont known reason burr answer is correct

Answer:

When temperature increases ,gas increases ,because of the rise in temperature evaporation will take place.

Explanation:

When you boil water to make coffee/tea the kettle/boiler releases the evaporation caused by the rise in temperature.

Based on the nature of physical change, dissolving sugar in water is a physical change .

A physical change is a change which does not produce new substances and which can be easily reversed.

Physical changes do not alter the chemical composition of a substance.

Examples of physical changes include:

Therefore, dissolving sugar in water is a physical change.

Learn more about physical change at: https://brainly.com/question/960225

Answer: a

Explanation:

Answer:

Mass = 58.96 g

Explanation:

Given data:

Mass of CH₄ = 21.5 g

Mass of O₂ = 387.5 g

Mass of CO₂ formed = ?

Solution:

Chemical equation:

CH₄ + 2O₂       →   CO₂ +  2H₂O

Number of moles of CH₄:

Number of moles = mass / molar mass

Number of moles = 21.5 g/ 16 g/mol

Number of moles = 1.34 mol

Number of moles of O₂ :

Number of moles = mass / molar mass

Number of moles = 387.5 g/ 32 g/mol

Number of moles = 12.1 mol

now we will compare the moles of CO₂  with O₂  and CH₄.

                       O₂             :          CO₂

                          2             :            1

                          12.1          :          1/2×12.1 = 6.05 mol

                        CH₄          :          CO₂

                           1              :            1

                          1.34           :         1.34

Number of moles of CO₂ produced by  CH₄ are less thus it will limiting reactant.

Mass of  CO₂:

Mass = number of moles × molar mass

Mass =  1.34 mol × 44 g/mol

Mass = 58.96 g