Answers
Answer:
c solid metal
Explanation:
it's made of iron and nickel
Answer:
D) solid metal
Explanation:
Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel. The shorthand used for the core's iron-nickel alloys is simply the elements' chemical symbols—NiFe. Elements that dissolve in iron, called siderophiles, are also found in the core.
The inner core is solid because it is made of very dense, or heavy, materials - like iron and nickel. Even though it is very hot, these materials don't "melt" very easily, so they stay solid.
Related Questions
Please help I’ll mark you brainiest if it’s correct. There is 3 answers to this one!
Answers
Answer:
c,e,f
Explanation:
Judging by what i tried to find out about this reaction, it seems that won't take place, though it could be wrong.
A short-lived structure formed during a collision is a(n)
a. reagent.
b. catalyst.
c. activated complex.
d. inhibitor.
Answers
Answer:
c. activated complex
Explanation:
When the equation Al + Br2 → AlBr3 is balanced, the coefficient for Br2 isSingle choice.
Answers
Answer:
The answer should be 2 because to balance the equation you should have to change to equation to this; 2Al + 3Br2 => 2AlBr3, so that there is a total of 2 Aluminums and 6 Bromiums on either side of the equation.
Explanation:
In the given chemical equation, the coefficient of bromine is 2.
Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
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Gold is classified as what type of element?
Answers
How many grams of carbon dioxide are produced when 2.05 moles of octane (C8H18)
combust?
2C3H18 (1) + 2502 (g) --> 16CO2 (g) + 18H20 (g) (balanced)
Answers
Did you ever get the answer
please help me with this answer
Answers
Answer:
1) Hom DOMINANT
2) Hom recessive
3) Hetero DOMINANT
4) Hom DOMINANT
5) Hetero DOMINANT
6) Hom recessive
Explanation:
Need help ASAP
Will mark BRAINLIST and thank you only for correct answers
Answers
not sure but d seems correct
Thank you to anyone who answers correctly ;w; (and if you tried)
What is the Kp for the decomposition of ammonia (if the reaction is at 500°C)?
2 NH3(g) N2(g) + 3 H2(g)
Answers
Answer:
Kp = 4.5 x 10⁻⁹
Explanation:
from equilibrium of gas phase rxns, Kp = Kc(R·T)^-Δn
2NH₃(g) ⇄ 3H₂(g) + N₂(g)
2Vm 3Vm 1Vm
Δn = ∑Vm(products) - ∑Vm(reactants) = (3Vm + 1Vm) - 2Vm = 2Vm = +2
Kc = Kb = [H₂]³[N₂]/[NH₃]² = 1.8 x 10⁻⁵M²
R = 0.08206 L·atm/mol·K
T = 500°C = (500 + 273)K = 773K
Kp = Kb(R·T)^-Δn = 1.8 x 10⁻⁵M²[(0.08206L·atm/mol·K)(773K)]⁻⁽⁺²⁾
= (1.8 x 10⁻⁵mol²/L²)(63.43atm/mol)⁻²
= 4.5 x 10⁻⁹atm
Hope this helps. :-)
A 0.239 gram sample of a gas in a 100-ml flask exerts a pressure of 603 mm Hg at 14 Celsius. What is the gas? (Hint: don’t forget BRINCLHOF)
A) chlorine
B) nitrogen
C) krypton
D) xenon
D) oxygen
Please help me and explain how u got ur answer
Answers
Answer:
A) chlorine
Explanation:
To solve this question we can use:
PV = nRT
In order to solve the moles of the gas. With the moles and the mass we can find the molar mass of the gas to have an idea of its identy:
PV = nRT
PV / RT = n
Where P is pressure: 603mmHg * (1atm / 760mmHg) = 0.7934atm
V = 100mL = 0.100L
R is gas constant = 0.082atmL/molK
T is absolute temperature = 14°C + 273.15 = 287.15K
0.7934atm*0.100L / 0.082atmL/molK*287.15K = n
3.37x10⁻³ moles of the gas
In 0.239g. The molar mass is:
0.239g / 3.37x10⁻³ moles = 70.9g/mol
The gas with this molar mass is Chlorine, Cl₂:
A) chlorineAmmonia (NH3 (g), Delta.Hf = –45.9 kJ/mol ) reacts with oxygen to produce nitrogen and water (H2 O(g), Delta.Hf = –241.8 kJ/mol) according to the equation below. 4 upper N upper H subscript 3 (g) plus 3 upper O subscript 2 (g) right arrow 2 upper N subscript 2 (g) plus 6 upper H subscript 2 upper O (g). What is the enthalpy of the reaction? Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants.. –3,572.1 kJ –1,267.2 kJ 1,267.2 kJ 3,572.1 kJ
Answers
Answer: –1,267.2 kJ
Explanation: B on edge, thank me later ;-)
–1,267.2 kJ is the enthalpy of the given reaction. Therefore, the correct option is option A among all the given options.
What is enthalpy?Enthalpy is a thermodynamic system's internal energy total as well as the volume times pressure ratio. Enthalpy is a property or state function that resembles energy; it has the same dimensions as energy and is therefore measured in joules or ergs. The value of enthalpy is solely dependent on the temperature, pressure, as well as composition of the system, not on its history.
The shift in the internal energy equals equivalent to the heat transmitted to, much less than the jobs completed by, the system, in accordance with the principle of energy conservation. The enthalpy change is precisely equal to the heat transmitted to the system if the sole work performed is a change in volume at constant pressure.
ΔH = ΔH for product - ΔH for reactant
= 3,572.1 kJ –1,267.2 kJ
= –1,267.2 kJ
Therefore, the correct option is option A.
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A balloon has a negative charge and a glass rod has a positive charge.
Electromagnetic Forces Review: Mastery Assessment #3: INTEG SCIENCE 7-Jolley
What will happen when the glass rod is brought near the balloon?
Answers
Where would you have to be to see the view shown above? Explain.
Answers
a container contains 5L of nitrogen gas at 25°C. what will be it's volume if the temperature increases by 35°C keeping the pressure constant
Answers
Answer:
5.168 L
Explanation:
Applying Charles Law,
V/T = V'/T'..................... Equation 1
Where V = Initial Volume, T = Initial Temperature in Kelvin, V' = Final Volume, T' = Final Temperature in Kelvin,
Make V' the subject of the equation,
V' = VT'/T................. Equation 2
From the question,
Given: V = 5L, T = 25°C = (25+273) = 298K, T' = 35°C = (35+273) = 308K
Substitute these values into equation 2
V' = (5×308)/298
V' = 5.168 L
Which advantage do multicellular organisms have over unicellule organisms
Answers
Answer:
Multicellular organisms thus have the competitive advantages of an increase in size without its limitations. They can have longer lifespans as they can continue living when individual cells die. Multicellularity also permits increasing complexity by allowing differentiation of cell types within one organism.
How much more acidic is 1 to 9
Answers
Answer:
Number one is the most acidic, the one in the middle is neutral, and number nine is alkaline.
The layer of the Sun's atmosphere that we can see is the photosphere
True
False
Answers
Answer:
Pretty sure its True
Explanation:
I'm taking k12 astronomy
HELP ME PLEASE
Iron is a metal. Which property would you expect it to have?
A. It is a bad conductor of heat.
B. It is a gas at room temperature,
C. It is a good conductor of electricity
D. It has little or no shine
Answers
Answer: it is a good conductor of electriciy tht is what wires are made of and it is a good conductor of heat so it will be able to handle the heat from the electricity
Explanation:
Answer:
Iron is a shiny, bright white metal that is soft, malleable, ductile and strong. Its surface is usually discolored by corrosion, since it combines readily with the oxygen of the air in the presence of moisture. In absolutely dry air, it does not rust
Explanation:
I hope it helps
1. A mixture of 3 gases (A, B, and C) has a total pressure of 240kPa. If the partial pressure of
Gas A is 107 kPa and the partial pressure of Gas B is 55 kPa, what is the partial pressure of
Gas C?
Answers
Answer:
78 kPa
Explanation:
The total pressure is the sum of the partial pressures:
240 = Pa + Pb + Pc
240 = 107 + 55 + Pc
Pc = 78 kPa
Answer:
78 kPa
Explanation:
The difference between sunspots solar flares and prominence
Answers
Answer:
Sunspots are cooler and darker than the rest of the Sun's surface. They are marked by intense magnetic activity. Solar prominences are the plasma loops that connect two sunspots. Solar flares and coronal mass ejections are eruptions of highly energetic particles from the Sun's surface.
Explanation:
Answer:
Sunspots are dark areas on the surface of the Sun that are cooler than surrounding areas. They appear in groups, vary in size, and cycle in number over an 11-year period. Solar flares are sudden eruptions of energy from a small area of the Sun's surface. They are extremely hot (10 to 20 million degrees Celsius) and extend into the corona. Solar flares occur near sunspots and can disturb radio communications on Earth.
Explanation:
What causes Earth to orbit the sun ?
Answers
Answer:
gravity pulls on the earth and putts it in orbit around the sun
Explanation:
What is the thermal energy needed to vaporize 18.02g of water at 100°C? The Heat of Vaporization for water is 40.650 kJ/mol.
Answers
Answer:
40.7 kJ
Explanation:
Applying,
q = c'n.................. Equation 1
Where q = Thermal Heat, c' = Heat of vaporization of water, n = number of mole of water.
But,
n = mass(m)/Molar mass(m')
n = m/m'............... Equation 2
Substitute equation 2 into equation 1
q = c'(m/m')............. Equation 3
Given: c' = 40.650 KJ/mol, m = 18.02 g
Constant: m' = 18 g/mol
Substitute into equation 3
q = 40.650(18.02/18)
q = 40.695 kJ
q ≈ 40.7 kJ
Even though the same amount of energy was transferred into both substances from the air, the isopropanol evaporated while the water did not. Why do you think the isopropanol changed phase, but the liquid water did not ... Earlier in the lesson, you observed isopropanol and water drops on a paper towel.HELP HELP PLS
Answers
Answer:
The isopropanol evaporated while the water did not because the molecules don't stick together as strongly as the molecules in the water do. The water would need more energy transferred in, in order to evaporate.
Explanation:
The isopropanol evaporates and the water does not because the heat capacity and the latent heat of isopropanol is far lesser than that of water.
The latent heat of vaporization is the amount of heat required by a given amount of substance to change its phase from liquid to gas. The latent heat of vaporization of isopropanol is far less than water, so at the same amount of heat, the isopropanol changes phase as it can easily evaporate even if a small amount of heat is provided. Whereas water requires to absorb a lot of heat energy to change its phase, since its latent heat of vaporization and specific heat capacity is very large as compared to isopropanol.
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Is hc2h3o2 quadraprotic?
Answers
do u mean quadratic either way it’s isn’t.
sorry for not much help xox
Which of the following actions decreases the entropy of a system?
A-mixing baking soda and salt
b- freezing water
c- dissolving salt in water
d-boiling water
Answers
Answer:
b- freezing water
Explanation:
Solid<liquid<gas is the general rule for entropy increase
Freezing water would change the phase from liquid to solid which would lead to less entropy
Grants are money for education that students can use and not pay back. Of those listed, which one is an example of a grant.
A) AID
B) PELL
C) PLUS
D) Stafford and Perkins
Answers
Aid is money given to students for education funding which may not be paid back.
What is aid?The term aid may be used to refer to money given to a person for a particular purpose which the person may not be required to pay back. Often students are given this sort of assitance to fund their education.
Hence, grants given to students to finance their education which they may not pay back are called aid.
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Quicklime is an incredibly caustic substance that has been used during plagues to quickly dissolve diseased corpses. Calcium carbonate can be heated to produce quicklime (CaO) and carbon dioxide gas. What mass of quicklime could be produced from a 4,500g bag of calcium carbonate?
Answers
Answer:I just want points
Explanation:because I need them for future questions
what are 5 reason masks are important for the virus
Answers
They prevent asymptomatic spread. ...
You're protecting others from illness. ...
They're mandated by law in some states. ...
They're good hygiene in general.
Answer:
they reduce viral transmission
They prevent asymptomatic spread
You're protecting others from illness.
They're mandated by law in some states
They're good hygiene in general
Place in order from smallest to largest: planet, galaxy, solar system, star, universe Question 3 options: star, planet, solar system, galaxy, universe universe, galaxy, solar system, star, planet galaxy, universe, solar system, star, planet planet, star, solar system, galaxy, universe
Answers
Answer:
planet, star, solar system, galaxy, universe
plz mark me as brainliest.
plz help me 14 points
Answers
Chemistry Questions
5) What is matter? Mention the characteristic of particles of matter.
Answers
Answer:
As known matter is anything that occupies space and has mass.